HP Dc7900 Service Reference Guide: HP Compaq dc7900 Business PC
HP Dc7900 - Compaq Business Desktop Manual
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- HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 1
Service Reference Guide HP Compaq dc7900 Business PC - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 2
HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP . Service Reference Guide Business PCs First Edition (September 2008) Document Part Number: 506592-001 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 3
About This Book WARNING! Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of life. CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information. NOTE: Text set - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 4
iv About This Book - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 5
Installing the Operating System ...1 Installing or Upgrading Device Drivers 1 HP Backup and Recovery Manager ...2 2 Computer Setup (F10 HP Insight Diagnostics 21 Protecting the Software ...21 HP Backup and Recovery Manager 22 4 Desktop Management Initial Configuration and Deployment 23 HP - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 6
USB Flash Media Device 36 Unsupported USB Flash Media Device 37 Dual-State Power Button ...38 HP Web Site Support ...39 Industry Standards ...39 Asset Tracking and Security ...39 Password Security ...43 Establishing a Setup Password Using Computer Setup 43 Establishing a Power-On Password - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 7
Serial Minitower (CMT 54 Small Form Factor (SFF 55 Ultra-Slim Desktop (USDT 55 the Monitor ...60 Cleaning the Mouse ...60 Service Considerations ...60 Power Supply Fan ...60 Tools a Security Lock 66 Cable Lock ...66 Padlock ...67 HP Business PC Security Lock 68 Computer Access Panel ...70 Front - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 8
Desktop Configuration 113 Changing from a Desktop to a Minitower Configuration 115 8 Removal and Replacement Procedures Small Form Factor (SFF HP Business PC Security Lock 123 Front Bezel Security 125 Computer Access Panel ...125 Front Bezel ...126 Bezel Blanks ...127 Installing Additional Memory - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 9
...174 Type 2 Battery Holder ...174 Type 3 Battery Holder ...175 Using the Small Form Factor Computer in a Tower Orientation 176 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis Preparation for Disassembly ...178 External Security Devices ...179 Installing a Security Lock - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 10
Pin Power (for CPU) (CMT, SFF 219 SATA Data and Power ...220 PCI Express ...220 PCI Express ...221 PCI Express Mini Card ...222 DVI Connector ...223 Appendix B Power Cord Set Requirements General Requirements ...224 Japanese Power Cord Requirements 224 Country-Specific Requirements ...225 Appendix - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 11
269 Solving Internet Access Problems ...269 Solving Software Problems ...271 Contacting Customer Support ...272 Appendix E System Board and Riser Board Reference Designators ...273 Appendix F Specifications CMT Specifications ...279 SFF Specifications ...280 USDT Specifications ...281 Index ...283 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 12
xii - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 13
the operating system to the appropriate drivers. Obtain the latest support software, including support software for the operating system from http://www.hp.com/support. Select your country and language, select Download drivers and software (and firmware), enter the model number of the computer, and - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 14
and Recovery Manager Manual. NOTE: You can order a Recovery Disc Set from HP by calling the HP support center. Go to the following Web site, select your region, and click the Technical support after you buy link under the Call HP heading to obtain the support center telephone number for your region - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 15
for processor, graphics, memory, audio, storage, POST messages, such as memory count, product name, and of the mode selected. To manually switch to Post Messages Enabled during Asset Tag or property identification number assigned by the company to including the serial, USB, or parallel ports, audio, - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 16
on a specified ATA hard drive (when supported by drive). ● Enable or disable DriveLock security (when supported by drive). Using Computer Setup (F10) system defaults. CAUTION: Do NOT turn the computer power OFF while the BIOS is saving the Computer Setup (F10) changes because the CMOS could become - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 17
this listed twice) ● Installed memory size/speed, number of channels (single or dual) (if applicable) ● Integrated MAC address for embedded, enabled NIC (if applicable) ● System BIOS (includes family name and version) ● Chassis serial number ● Asset tracking number ● ME firmware version ● Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 18
Support for specific Computer Setup options may vary depending on the hardware configuration. Table 2-3 Computer Setup-Storage Option Description Device Configuration Lists all installed BIOS be used for the device. This enables the BIOS to access disks partitioned and formatted on other systems - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 19
to the Advanced Host Controller Interface (AHCI) and Redundant Array of Independent Disks (RAID) on HP Compaq dc7900 Business PCs white paper at http://www.hp.com for more information. NOTE: RAID is not available on USDT systems. Max eSATA Speed Allows you to choose 1.5 Gbps or 3.0 Gpbs as the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 20
for this one time. Computer Setup-Security NOTE: Support for specific Computer Setup options may vary depending on the hardware certain plug and play settings under Windows. Power-On Password See the Desktop Management Guide for more information. Allows you to set and enable a power-on password - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 21
that the cover has been removed. This feature is supported on some models only. See the Desktop Management Guide for more information. Device Security Allows you to set Device Available/Device Hidden for: ● Serial ports ● Parallel port ● System audio ● Network controllers (some models) ● Legacy - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 22
cold-boot sequence. NOTE: This selection will only appear when at least one drive that supports the DriveLock feature is attached to the system. See the Desktop Management Guide for more information. System Security (some models: these options are hardware dependent) Data Execution Prevention - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 23
. Changing this setting requires turning the computer off and then back on. NOTE: To enable this option, a Setup password must be set. Smart Card BIOS Password Support (some models) (enable/disable) - Allows the user to enable/ disable the Smart Card to be used in place of the Setup and Power-On - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 24
Computer Setup-Power NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. when the processor is idle. ● ACPI S3 Hard Disk Reset-Enabling this causes the BIOS to ensure hard disks are ready to accept commands after resuming from S3 before returning - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 25
Support for specific Computer Setup options may vary depending on the hardware configuration. Table 2-6 Computer Setup-Advanced (for advanced users) Option Heading Power-On Options Allows you to set: ● POST mode (QuickBoot, Clear Memory recovery partition and launch HP Backup and Recovery. The - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 26
the POST memory test. (some models) BIOS Power-On Allows you to set the computer to turn on automatically at a time you specify. Onboard Devices PCI Devices Allows you to set resources for or disable onboard system devices (diskette controller, serial port, or parallel port). ● Lists currently - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 27
PCI Express video is on, Integrated Video must remain disabled. ● Multi-Processor (enable/disable). This option may be used to disable multi-processor support under the OS. ● Internal speaker (some models) (does not affect external speakers). ● Monitor Tracking (enable/disable). Allows BIOS services. - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 28
Table 2-6 Computer Setup-Advanced (for advanced users) (continued) administrator. This option determines if the BIOS will keep the local keyboard enabled or disabled for possible local client interaction. If the local keyboard is disabled, all keyboard input is only accepted - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 29
Support Center. NOTE: Third party devices may not be detected by HP Insight Diagnostics. Accessing HP Insight Diagnostics To access HP Insight the instructions in the wizard to create a Recovery Disc Set. 4. Use Windows Explorer to search the Recovery Disc Set for the CD with the compaq\hpdiags - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 30
about the computer. Architecture-Provides system BIOS and PCI device information. Asset Control-Shows product name, asset tag, system serial number, and processor information. Communication-Shows information about the computer parallel (LPT) and serial (COM) port settings, plus USB and network - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 31
testing of a system. The Custom Test mode allows you to specifically select which devices, tests, and test parameters are run. For executed, either Number of Loops or Total Test Time. When choosing to run the test over a specified number of loops, enter the number of loops to HP Insight Diagnostics 19 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 32
Failed Count is the number of times the device has failed a test. ● The Error Code provides a numerical code for the failure. The error codes are defined in the the problem. To find an error code description quickly, enter the code in the box at the top of the tab and click the Find Error Codes - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 33
not supported. hp.com. 2. Click the Software & Drivers link. 3. Select Download drivers and software (and firmware). 4. Enter your product number (for example, dc7900) in the text box and press the Enter key. 5. Select your specific instructions on making backup copies of data files. Protecting the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 34
and Recovery Manager Manual. NOTE: You can order a Recovery Disc Set from HP by calling the HP support center. Go to the following Web site, select your region, and click the Technical support after you buy link under the Call HP heading to obtain the support center telephone number for your region - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 35
of desktop management are: ● Initial configuration and deployment ● Remote system installation ● Software updating and management ● ROM flash ● Hardware option configuration ● Asset tracking and security ● Fault notification and recovery NOTE: Support for specific features described in this guide - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 36
Software Agent: 1. Click Start. 2. Click All Programs. 3. Click HP Manageability. 4. Click Radia Management Agent Readme. 5. Review and follow the instructions contained in the Readme file to install the HP Software Agent. The HP Software Agent is a key infrastructure component for enabling all of - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 37
Installation, press F12 when the F12 = Network Service Boot message appears in the lower-right corner of the HP logo screen when the computer is booting up. Follow the instructions on the screen to continue the process. The default boot order is a BIOS configuration setting that can be changed to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 38
how you manage your HP client computers. HP Client Management Interface used in conjunction with system management software can: ● Request in-depth client inventory information-Capture detailed information about the processors, hard drives, memory, BIOS, drivers, including sensor information (such - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 39
: ● The Starter Edition is a free product for managing HP desktops, notebooks and workstations, providing hardware and software inventory, remote control, HP alert monitoring, HP BIOS and driver updates, integration with HP Protect Tools and add-on support for Intel AMT. The Starter Edition also - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 40
drivers and BIOS updates without visiting each PC ● Remotely configure BIOS and security settings ● Automate processes to quickly resolve hardware problems Tight integration with HP Instant Support tools reduces hardware troubleshooting time. ● Diagnostics-remotely run & view reports on HP desktop - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 41
HP business desktops, notebooks and workstations. It can be used in conjunction with the custom inventory and update features of Microsoft products to provide automated driver and patch updates to managed HP client computers. Microsoft products supported by the HP manually. Important files can - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 42
Serial- HP-specific information on Intel vPro technology, see the white papers at http://www.hp.com/ support. Select your country and language, select See support and troubleshooting information, enter the model number of the computer, and press Enter. In the Resources category, click Manuals (guides - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 43
● ASF ASF and AMT may not be configured at the same time, but both are supported. To configure Intel vPro systems for AMT or ASF: 1. Turn on or restart the to access the utility. This hot-key enters the Intel Management Engine BIOS Execution (MEBx) setup utility. This utility allows the user to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 44
's Choice Subscriber's Choice is a client-based service from HP. Based on your profile, HP will supply you with personalized product tips, feature articles, and/or driver and support alerts/notifications. Subscriber's Choice Driver and Support Alerts/Notifications will deliver e-mails notifying you - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 45
want to upgrade the BIOS, you may download the latest BIOS images from the HP driver and support page, http://www.hp.com/support/files. CAUTION: BIOS of individual PCs from a Windows operating system. For more information on HPQFlash, visit http://www.hp.com/support/files and enter the model number - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 46
system BIOS image is detected, the system power LED will blink red 8 times, one blink every second. Simultaneously, the speaker will beep 8 drive or a supported USB flash drive. Copying to Single Computer CAUTION: A setup configuration is model-specific. File system Chapter 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 47
or USB flash media device. 8. Download a BIOS utility for replicating setup (repset.exe) and copy it onto the configuration diskette or USB flash media device. To obtain this utility, go to http://welcome.hp.com/country/us/en/ support.html and enter the model number of the computer. Replicating the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 48
Supported USB Flash Media Device Supported devices have a preinstalled image to simplify the process of making them bootable. All HP or Compaq device, do not proceed. Data loss can occur. Check all USB ports for additional storage devices. If any are found, remove them, reboot 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 49
and unplug the power cord. CAUTION: The power cord MUST be unplugged. 2. Open the computer and remove the PCI cards. 3. Insert the USB flash media device into one of the computer's USB ports and remove all other USB storage devices except USB diskette drives. Close the computer cover. 4. Plug in the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 50
bypass the title screen, if necessary. 15. Go to Advanced > PCI Devices and re-enable the PATA and SATA controllers that were disabled Setup (F10) Utility. Refer to the Computer Setup (F10) Utility for instructions. If you have used a DOS version from Windows 9x, you may see Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 51
loss of data on the hard drive. HP Web Site Support HP engineers rigorously test and debug software developed by HP and third-party suppliers, and develop operating system specific support software, to ensure performance, compatibility, and reliability for HP computers. When making the transition to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 52
serial, or USB ports, or by disabling removable media boot capability, you can protect valuable data assets. Memory Change Guide included with the computer for additional information and instructions on using the Computer Setup Utilities. Some computers also have HP BIOS Chapter 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 53
that the cover has been removed. This feature is supported on some models only. Device Security Allows you to set Device Available/Device Hidden for: ● Serial ports ● Parallel port ● Rear USB ports ● Front USB ports ● Internal USB ports ● System audio ● Network controllers (some models) ● Legacy - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 54
needed to support a virtual Support ● Virtualization Technology ● Virtualization Technology Directed I/O Embedded Security Device Support authentication support authentication support and must be set. Smart Card BIOS Password Support (some models) (enable/disable) system memory exclusively - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 55
is turned on or restarted. The setup password specifically prevents unauthorized access to Computer Setup, and can refer to the HP ProtectTools Security Manager Guide at http://www.hp.com. Establishing , then select Setup Password and follow the instructions on the screen. 4. Before exiting, click - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 56
Security, then Power-On Password and follow the instructions on the screen. 4. Before exiting, click File is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at http://www.hp.com. If a setup password has been established on the 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 57
is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at http://www.hp.com. 1. Turn on or restart the computer. If you Keyboard Delimiter Characters Each keyboard is designed to meet country-specific requirements. The syntax and keys that you use to change - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 58
Troubleshooting Guide for instructions on clearing passwords. If the system is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at http://www.hp more hard drives that support the ATA Security instructed to cycle power. 46 Chapter 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 59
, other asset control functions, and support. For users with less stringent security requirements, HP does not recommend enabling DriveLock. Users more information about Computer Setup, see the Computer Setup (F10) Utility Guide. Setting the Smart Cover Sensor Protection Level To set the Smart Cover - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 60
Smart Cover Lock The Smart Cover Lock is a software-controllable cover lock featured on some HP computers. This lock prevents unauthorized access to the internal components. Computers ship with the Smart failure (such as processor or power supply) ● Forgotten password 48 Chapter 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 61
some HP computers. DPS is designed to help diagnose problems that might result in unwarranted hard drive replacement. When HP computers service provider can use this information to help diagnose conditions that caused you to run the DPS software. Refer to the Troubleshooting Guide for instructions - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 62
before internal components are damaged or data is lost. CAUTION: A high temperature condition can result in damage to the system or data loss. 50 Chapter 4 Desktop Management - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 63
Parallel ATA Drive Guidelines and Features NOTE: Serial ATA = SATA Parallel ATA = PATA SATA Hard Drives Serial ATA Hard Drive Characteristics Number of pins/conductors in data cable Number of pins in power cable Maximum data cable length Data interface voltage differential Drive voltages Jumpers - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 64
compatible with the SATA 1.5 Gb/s drives. Current HP desktop products ship with SATA 3.0 Gb/s hard drives. table, each cable has 3 grounds, and 4 transmit/receive pins. Pin Number Usage P1 Ground P2 A+ P3 A- P4 Ground P5 B- P6 B+ 5 Serial and Parallel ATA Drive Guidelines and Features - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 65
USDT model is the only product that supports a PATA optical drive. No PATA drives are supported on any other model. ATA SMART Drives The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP be subdivided into a number of unique drive partitions computer specification. Drive - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 66
the procedures and precautions described in this chapter is essential for proper service. CAUTION: When the computer is plugged into an AC power system board or component damage. Chassis Designations Convertible Minitower (CMT) Figure 6-1 Convertible Minitower chassis 54 Chapter 6 Identifying the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 67
Small Form Factor (SFF) Figure 6-2 Small Form Factor chassis Ultra-Slim Desktop (USDT) Figure 6-3 Ultra-Slim Desktop chassis Chassis Designations 55 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 68
Electrostatic Discharge Information A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 69
dissipative surfaces. ● Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam. ● Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive. Recommended Materials and Equipment Materials and equipment that are recommended - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 70
table or floor mats with hard tie to ground ● Field service kits ● Static awareness labels ● Wrist straps and footwear straps the keyboard, with the keyboard feet down, directly against the front of the desktop unit as this also restricts airflow. ● Occasionally clean the air vents on all - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 71
the keyboard body, follow the procedures described in Cleaning the Computer Case on page 59. When cleaning debris from under the keys, review all rules in General Cleaning Safety Precautions on page 59 before following these procedures: CAUTION: Use safety glasses equipped with side shields before - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 72
prevent system board or component damage. Tools and Software Requirements To service the computer, you need the following: ● Torx T-15 screwdriver (HP screwdriver with bits, PN 161946-001) ● Torx T-15 screwdriver with small diameter shank (for certain front bezel removal) ● Flat-bladed screwdriver - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 73
screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the caught or snagged by parts being removed or replaced. CAUTION: When servicing this computer, ensure that cables are placed in their proper location - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 74
and replacement chapter for the chassis you are working on in this guide for instructions on the replacement procedures. WARNING! This computer contains a lithium battery use the public collection system or return them to HP, their authorized partners, or their agents. 62 Chapter 6 Identifying - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 75
described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. NOTE: Not all features listed in this guide are available on all computers. Preparation for - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 76
HP reseller or service provider. Order PN 166527-001 for the wrench-style key or PN 166527-002 for the screwdriver bit key. ● Refer to the HP Web site (http://www.hp.com) for ordering information. ● Call the appropriate number listed in the warranty or in the Support Telephone Numbers guide - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 77
2. Use the Smart Cover FailSafe Key to remove the two tamper-proof screws that secure the Smart Cover Lock to the chassis. Figure 7-1 Removing the Smart Cover Lock Screws You can now remove the access panel. See Computer Access Panel on page 70. To reattach the Smart Cover Lock, secure the lock in - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 78
on the following page can be used to secure the computer. Cable Lock Figure 7-2 Installing a Cable Lock 66 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 79
Padlock Figure 7-3 Installing a Padlock External Security Devices 67 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 80
HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. Figure 7-4 Securing the Cable to a mouse cables through the lock. Figure 7-5 Threading the Keyboard and Mouse Cables 68 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 81
3. Screw the lock to the chassis using the screw provided. Figure 7-6 Attaching the Lock to the Chassis 4. Insert the plug end of the security cable into the lock (1) and push the button in (2) to engage the lock. Use the key provided to disengage the lock. Figure 7-7 Engaging the Lock External - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 82
the unit (2). Figure 7-8 Removing the Computer Access Panel To install the access panel, reverse the removal procedure. 70 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 83
Front Bezel 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel (Computer Access Panel on page 70). 3. Push up on the two release tabs (1), then rotate the front bezel away from the chassis to release it (2). Figure 7-9 Removing the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 84
pins that align it within the front bezel. Figure 7-10 Removing Bezel Blanks from the Subpanel (Desktop Shown) NOTE: When replacing the subpanel, ensure that the aligning pins and any remaining bezel blanks . 72 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 85
when working inside the computer. ● Keep cables away from major heat sources like the heatsink. ● Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them. ● Keep cables clear of sliding or moveable parts to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 86
System board connectors are color-coded to make it easier to USB cable Front I/O audio Internal speaker Serial port Hood lock solenoid Hood sensor Media card reader Flying parallel port header ReadyBoost module Power Supply Cable Connections Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 87
timing) and CAS latency 6 DDR2 800 Mhz (6-6-6 timing) ● contain the mandatory JEDEC SPD information In addition, the computer supports: ● 512-Mbit and 1-Gbit non-ECC memory technologies ● single-sided and double-sided DIMMs ● DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 88
memory channel A. Sockets DIMM3 and DIMM4 operate in memory POST error message indicating that a memory module must be installed in the total memory capacity of the DIMMs in Channel A is equal to the total memory capacity total memory capacity of the DIMMs in Channel A is not equal to the total memory - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 89
computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel (Computer Access Panel on page 70). 3. Locate the memory module sockets on the system board. WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 90
the tab on the memory socket. A DIMM must occupy the black DIMM1 socket. For maximum performance, populate the sockets so that the memory capacity is spread as removed. The computer should automatically recognize the additional memory the next time you turn on the computer. 78 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 91
x16 expansion slot that is downshifted to a x4 slot 3 PCI Express x1 expansion slot 4 PCI expansion slot 5 PCI expansion slot 6 PCI expansion slot NOTE: You can install a PCI Express x1, x8, or x16 expansion card in the PCI Express x16 slots. For dual graphics card configurations, the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 92
chassis. Lift the expansion slot cover from the expansion slot. Figure 7-16 Removing an Expansion Slot Cover 80 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 93
. Lift the card straight up to remove it. Be sure not to scrape the card against other components. Figure 7-17 Removing a Standard PCI Expansion Card c. If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion socket away from the card and carefully rock the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 94
card, if needed. Connect internal cables to the system board, if needed. 11. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for instructions on using Computer Setup. 82 Chapter 7 Removal and Replacement Procedures Convertible Minitower - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 95
If the media card reader has a 1394 port, connect the 1394 cable to the 1394 PCI card. ● The system does not support Parallel ATA (PATA) optical drives or lock in place. HP has provided extra guide screws installed on the chassis. The hard drive uses 6-32 isolation mounting guide screws, four of - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 96
Figure 7-21 Extra Optical Drive M3 Guide Screws Location CAUTION: To prevent loss of work and damage to the computer or drive: If you are protective packaging and label the package "Fragile: Handle With Care." 84 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 97
System Board Drive Connections Refer to the following illustration and table to identify the system board drive connectors. Figure 7-22 System Board Drive Connections Table 7-3 System Board Drive Connections No. System Board Connector System Board Label 1 SATA0 SATA0 2 SATA1 SATA1 3 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 98
Positions Figure 7-23 Desktop and Minitower Drive bays are available from HP. The bottom 5.25-inch drive bay has a shorter depth than the upper two bays. The bottom bay supports a half-height drive Guide for more information. 86 Chapter 7 Removal and Replacement Procedures Convertible Minitower - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 99
Removing a Drive from a Drive Bay CAUTION: All removable media should be taken out of a drive before removing the drive from the computer. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel (Computer Access Panel on page 70). 3. - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 100
you are removing a media card reader, disconnect the USB cable from the system board. If the media card reader has a 1394 port, disconnect the 1394 cable from the PCI card. Figure 7-26 Disconnecting the Media Card Reader USB Cable Figure 7-27 Disconnecting the Media Card Reader 1394 Cable 88 Chapter - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 101
out. Figure 7-28 Removing a 5.25-inch Drive in the Desktop Configuration (Optical Drive shown) ● To remove a 3.5-inch drive or a 5.25-inch drive in the minitower configuration, pull up on the green drivelock mechanism (1) for that specific drive and slide the drive from the drive bay (2). Figure - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 102
from the drive bay (2). Figure 7-30 Removing a Hard Drive 5. Store the removed drive in anti-static packaging. 90 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 103
guide screws location. If you are replacing a drive, transfer the guides screws from the old drive to the new one. Figure 7-31 Installing a 5.25-Inch Drive in a Minitower (top) and Desktop shorter depth than the upper two bays. The bottom bay supports a half-height drive or other device that is no - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 104
following the numbered sequence port, connect the 1394 cable to the 1394 PCI card. Refer to System Board Drive Connections on page 85 for an illustration of the system board drive connectors. 8. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for instructions - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 105
does not support Parallel ATA system, software drivers, and any software applications that were preinstalled Guide Screws NOTE: The hard drive uses 6-32 isolation mounting guide screws. Four extra guide screws are installed on the hard drive bracket under the access panel. The HP-supplied isolation mounting guide - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 106
Drive Bay CAUTION: Make sure the guide screws line up with the guide slots in the drive cage. The connector labeled SATA0 to avoid any hard drive performance problems. If you are adding a second hard drive, Setup (F10) Utility Guide for instructions on using Computer Setup. 94 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 107
a Recovery Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. If you do not have this CD set, select Start > HP Backup and Recovery and create it now. 1. Unlock the hard drive carrier - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 108
the four screws from the bottom of the hard drive carrier. Figure 7-38 Removing the Security Screws 96 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 109
5. Slide the hard drive back to disconnect it from the carrier then lift it up and out of the carrier. Figure 7-39 Removing the Hard Drive 6. Place the new hard drive in the carrier then slide the hard drive back so that it seats in the SATA connector on the carrier's circuit board. Be sure the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 110
to the top of the hard drive with the adhesive strip (2). Figure 7-42 Replacing the Thermal Sensor 98 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 111
9. Slide the cover on the carrier (1) and replace the screw on the rear of the carrier to secure the cover in place (2). Figure 7-43 Replacing the Carrier Cover 10. Slide the hard drive carrier into the enclosure on the computer and lock it with the key provided. NOTE: The carrier must be locked for - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 112
wall, and then remove the assembly from the computer. To reinstall the assembly, reverse the removal procedure. 100 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 113
Speaker 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel (Computer Access Panel on page 70). 3. Disconnect the speaker wire from the system board, and remove the wire from the clip on top of the fan shroud. 4. Remove the two screws - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 114
the top tabs snap into place. Be sure to orient the air flow out of the unit. 102 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 115
panel (Computer Access Panel on page 70). 3. Remove the two screws that secure the port to the chassis. 4. Disconnect the cable from the system board 5. Remove the port assembly from the chassis. Figure 7-47 Removing the eSATA port To install the eSATA port, reverse the removal procedure. eSATA - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 116
on the processor. Failure to do so could result in damage that requires replacing the system board. 104 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 117
Fan Shroud 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel (Computer Access Panel on page 70). 3. Remove the heatsink (Heatsink on page 104). 4. Pull up on all four shroud tabs simultaneously and slide the shroud from the heatsink - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 118
. 4. Clean the bottom of the heatsink with the provided alcohol pad and place it atop the processor. 106 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 119
board, always update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files. Front Chassis Fan 1. Prepare the computer for disassembly (Preparation for Disassembly on page - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 120
lift the power supply out of the chassis. To install the power supply, reverse the removal procedure. 108 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 121
removed from the defective system board and installed on the replacement system board: ● Memory modules ● Expansion boards ● Processor 3. Remove the computer access panel (Computer Access Panel replacing the system board, you must also change the chassis serial number in the BIOS. System Board 109 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 122
water. Replace the battery only with the HP spare designated for this product. CAUTION: Guide for information on backing up the CMOS settings. NOTE: HP encourages customers to recycle used electronic hardware, HP http://www.hp.com/ instructions to replace the battery: 110 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 123
on power to the computer. 6. Reset the date and time and any special system setups using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 2 Battery Holder 1. To release the battery from its holder, squeeze the metal clamp (1) that extends above one edge of the battery. When the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 124
time and any special system setups using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 3 Battery Holder 1. Pull back on the clip (1) that holds the battery in place the Computer Setup (F10) Utility Guide. 112 Chapter 7 Removal and Replacement Procedures Convertible Minitower - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 125
Changing from a Minitower to a Desktop Configuration 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access Figure 7-58 Releasing the 5.25-inch Drives from the Drive Bays (Minitower) Changing from a Minitower to a Desktop Configuration 113 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 126
Figure 7-59 Installing a Drive in the Desktop Configuration 7. Gently slide the drive into a shorter depth than the upper two bays. The bottom bay supports a half-height drive or other device that is no more desktop configuration. 114 Chapter 7 Removal and Replacement Procedures Convertible Minitower - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 127
with the logo at the bottom, then snap it back into the bezel. Figure 7-60 Changing from a Minitower to a Desktop Configuration Changing from a Desktop to a Minitower Configuration 1. Prepare the computer for disassembly (Preparation for Disassembly on page 63). 2. Remove the computer access panel - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 128
CAUTION: The bottom 5.25-inch drive bay has a shorter depth than the upper two bays. The bottom bay supports a half-height drive or other device that is no more than 14.5 cm (5.7 inches) in depth. Do configuration. 116 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 129
11. Reposition the subpanel (rotate it 90º) with the logo at the bottom, then snap it back into the bezel. Figure 7-63 Changing from a Desktop to a Minitower Configuration Changing from a Desktop to a Minitower Configuration 117 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 130
8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 131
HP reseller or service provider. Order PN 166527-001 for the wrench-style key or PN 166527-002 for the screwdriver bit key. ● Refer to the HP Web site (http://www.hp.com) for ordering information. ● Call the appropriate number listed in the warranty or in the Support Telephone Numbers guide - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 132
on page 125. To reattach the Smart Cover Lock, secure the lock in place with the tamper-proof screw. 120 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 133
External Security Devices The following security devices are used to prevent unauthorized access to the internal components of the computer and/or secure the computer to a fixed object. Installing a Security Lock The security locks displayed below and on the following pages can be used to secure the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 134
Padlock Figure 8-3 Installing a Padlock 122 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 135
HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. Figure 8-4 Securing the Cable to a Fixed Object 2. Thread the keyboard and mouse cables through the lock. Figure 8-5 Threading the Keyboard and Mouse Cables External Security Devices 123 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 136
the button in (2) to engage the lock. Use the key provided to disengage the lock. Figure 8-7 Engaging the Lock 124 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 137
Front Bezel Security The front bezel can be locked in place by installing a security screw provided by HP. The security screw is located on the fan duct inside the chassis. To lock the front bezel, remove the security screw from the fan duct (1) - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 138
by the left side. Figure 8-10 Removing the Front Bezel To install the front bezel, reverse the removal procedure. 126 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 139
Bezel Blanks On some models, there are bezel blanks covering the 3.5-inch and 5.25-inch external drive bays that need to be removed before installing a drive. To remove a bezel blank: 1. Remove the front bezel (Front Bezel on page 126).. 2. To remove the 3.5-inch bezel blank, push the two retaining - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 140
memory technologies ● single-sided and double-sided DIMMs ● DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not supported NOTE: The system will not operate properly if you install unsupported DIMMs. 128 Chapter 8 Removal and Replacement Procedures Small Form Factor - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 141
4 DIMM4 socket, Channel B White NOTE: A DIMM must occupy the black DIMM1 socket. Otherwise, the system will display a POST error message indicating that a memory module must be installed in the black socket. The system will automatically operate in single channel mode, dual channel mode, or flex - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 142
drive bay housing and the power supply to access the memory module sockets on the system board. WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching. 130 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 143
installed in only one way. Match the notch on the module with the tab on the memory socket. A DIMM must occupy the black DIMM1 socket. For maximum performance, populate the sockets so that the memory capacity is spread as equally as possible between Channel A and Channel B. 5. Push the module down - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 144
x4 slot. NOTE: The PCI and PCI Express slots support only low profile cards. An optional PCI riser card with two full height standard PCI slots is available from HP. Figure 8-15 Expansion Slot of the computer chassis. 132 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 145
4. Release the slot cover retention latch that secures the PCI slot covers by lifting the green tab on the latch and rotating the latch to the open position. Figure 8-16 Opening the Expansion Slot Retainer 5. - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 146
inside of the chassis to release it from the chassis frame. Be sure not to scrape the card against the other components. Figure 8-19 Removing a PCI Express x16 Expansion Card 134 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 147
6. Store the removed card in anti-static packaging. 7. If you are not installing a new expansion card, install an expansion slot cover to close the open slot. CAUTION: After removing an expansion card, you must replace it with a new card or expansion slot cover for proper cooling of internal - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 148
card, if needed. Connect internal cables to the system board, if needed. 11. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for instructions on using Computer Setup. 136 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 149
Cable Management The Small Form Factor chassis is a very compact computer and proper routing of from major heat sources like the heatsink. ● Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them. ● Keep - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 150
color-coded to Serial port 1st HDD 1st ODD or 2nd HDD if no HDD present 2nd HDD if ODD present eSATA port or extra ODD/ HDD connector Hood lock solenoid Hood sensor Media card reader Flying parallel port header ReadyBoost module 138 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 151
T-15 screwdriver is needed to remove and install the guide screws on a drive. CAUTION: Make sure personal files the primary hard drive, you will need to run the Restore Plus! CD to load the HP factory-installed files. Drive Positions Figure 8-23 Drive Positions Table 8-3 Drive Positions 1 3.5-inch - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 152
hard drive, you must remove the four silver and blue 6-32 isolation mounting guide screws from the old hard drive and install them in the new hard drive. Figure 8-24 Secondary Hard Drive 6-32 Guide Screws Location 140 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 153
Figure 8-25 Extra Optical Drive M3 Guide Screws Location CAUTION: To prevent loss of work and damage to the computer or drive: If you are inserting or removing a drive, shut down the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 154
SATA2 4 eSATA ESATA 5 Diskette Drive FLOPPY 6 Media Card Reader MEDIA Color dark blue white light blue black black black 142 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 155
Removing an Optical Drive CAUTION: All removable media should be taken out of a drive before removing the drive from the computer. To remove an optical drive: 1. Prepare the computer for disassembly (Preparation for Disassembly on page 118). 2. Remove the access panel (Computer Access Panel on page - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 156
: To replace the optical drive, reverse the removal procedure. When replacing a drive, transfer the four guide screws from the old drive to the new one. Installing an Optical Drive into the 5.25-inch more information. 144 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 157
in the lower holes on each side of the drive. HP has provided four extra M3 metric guide screws on the front of the chassis, under the front bezel. The M3 metric guide screws are black. Refer to Installing and Removing Drives on page 140 for an illustration of the extra M3 metric - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 158
data cable is routed through these guides before connecting it to the optical drive. 9. Connect the power cable (1) and data cable (2) to the rear of the optical drive. Figure 8-34 Connecting the Power and Data Cables 146 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 159
10. Rotate the drive cage back down to its normal position. CAUTION: Be careful not to pinch any cables or wires when rotating the drive cage down. Figure 8-35 Rotating the Drive Cage Down 11. Lock any security devices that were disengaged when the access panel was removed. The system automatically - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 160
the data cable (1) and power cable (2) from the back of the drive. Figure 8-36 Disconnecting the Diskette Drive Cables 148 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 161
you are removing a media card reader, disconnect the USB cable from the system board. If the media card reader has a 1394 port, disconnect the 1394 cable from the PCI card. Figure 8-37 Disconnecting the Media Card Reader USB Cable Figure 8-38 Disconnecting the Media Card Reader 1394 Cable Drives 149 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 162
into the 3.5-inch bay: NOTE: Install guide screws to ensure the drive will line up correctly in the drive cage and lock in place. HP has provided extra guide screws for the external drive bays (four more information. 150 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 163
guide available (unpopulated) SATA connector on the system board by following the numbered sequence of the connectors. c. If installing a media card reader, . If the media card reader includes a 1394 port, connect the 1394 cable to the 1394 PCI card. NOTE: Refer to System Board Drive Connections - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 164
NOTE: The system does not support Parallel ATA (PATA) hard restore the operating system, software drivers, and any software applications that were preinstalled on the computer. do not have this CD set, select Start > HP Backup and Recovery and create it now. The preinstalled Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 165
4. Rotate the power supply to its upright position. The hard drive is located beneath the power supply. CAUTION: If the computer has a Smart Cover Lock installed next to the drive cage, carefully route all cables around the Smart Cover Lock assembly as you raise the power supply to avoid damage to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 166
44 Removing the Hard Drive 7. To install a hard drive, you must transfer the silver and blue isolation mounting guide screws from the old hard drive to the new hard drive. Figure 8-45 Installing Hard Drive Guide Screws 154 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 167
route the SATA and power cables through the cable guide on the bottom of the chassis frame behind the hard on the system board to avoid any hard drive performance problems. If you are adding a second hard drive, connect drivers, and any software applications that were preinstalled on the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 168
Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. If you do not have this CD set, select Start > HP Backup and Recovery and create it now. 1. Unlock the hard Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 169
3. Remove the adhesive strip that secures the thermal sensor to the top of the hard drive (1) and move the thermal sensor away from the carrier (2). Figure 8-48 Removing the Thermal Sensor 4. Remove the four screws from the bottom of the hard drive carrier. Figure 8-49 Removing the Security Screws - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 170
is pressed all the way into the connector on the carrier's circuit board. Figure 8-51 Replacing the Hard Drive 158 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 171
7. Replace the four screws in the bottom of the carrier to hold the drive securely in place. Figure 8-52 Replacing the Security Screws 8. Place the thermal sensor on top of the hard drive in a position that does not cover the label (1) and attach the thermal sensor to the top of the hard drive with - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 172
with the key provided. NOTE: The carrier must be locked for power to be supplied to the hard drive. 160 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 173
Fan Shroud 1. Prepare the computer for disassembly (Preparation for Disassembly on page 118). 2. Remove the access panel (Computer Access Panel on page 125). 3. Lift the fan shroud straight up out of the chassis. Figure 8-55 Removing the fan shroud To install the fan shroud, reverse the removal - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 174
To install the chassis fan, reverse the removal procedure. Be sure to orient the air flow into the unit. 162 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 175
Hood Sensor The hood sensor is installed in the top of the baffle that is attached to the chassis fan. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 118). 2. Remove the access panel (Computer Access Panel on page 125). 3. Remove the front bezel (Front Bezel on page 126 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 176
LED. When installing the power switch, you may need to first insert one clip and the power button, then use a flat-blade screwdriver to help guide the other clip into its slot. 164 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 177
system board. 7. Remove the screw that secures the front I/O device to the chassis. 8. Pull the device forward, away from the chassis, and then guide the cables through the hole to remove them from the chassis. Figure 8-59 Removing the front I/O device To reinstall the front I/O device, reverse the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 178
the computer. Figure 8-61 Removing the Smart Cover Lock To install the Smart Cover Lock, reverse the removal procedure 166 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 179
Heatsink 1. Prepare the computer for disassembly (Preparation for Disassembly on page 118). 2. Remove the access panel (Computer Access Panel on page 125). 3. Remove the fan shroud (Fan Shroud on page 161). 4. Remove the chassis fan (Front Fan Assembly on page 162). 5. Loosen the four captive screws - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 180
has evaporated, apply thermal grease to the top of the processor from the syringe supplied in the spares kit. 168 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 181
system board, always update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files. Power Supply WARNING! Voltage is always present on the system board when the computer - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 182
positioned so they are not cut by the drive cage and are not pinched by the rotating power supply. 170 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 183
Panel on page 125). 3. Remove all PCI and PCI Express expansion boards (Expansion Cards on page the system board. 9. If applicable, disconnect the serial port from the system board. 10. Disconnect the balance you must also change the chassis serial number in the BIOS. NOTE: The heatsink should be - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 184
lift it out of the chassis (2). Figure 8-67 Removing the backwall To replace the backwall, reverse the removal procedures. 172 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 185
Computer Setup (F10) Utility Guide for information on backing up the CMOS settings. NOTE: HP encourages customers to recycle used electronic hardware, HP original print cartridges, and type of battery holder on your system board, complete the following instructions to replace the battery: Battery 173 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 186
and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 2 Battery Holder 1. To release the battery from its holder, squeeze the metal clamp that computer access panel. 174 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 187
computer. 5. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 3 Battery Holder 1. Pull back on the clip (1) that holds the battery in place, then remove the battery (2). 2. Insert the new battery and - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 188
Using the Small Form Factor Computer in a Tower Orientation The Small Form Factor computer can be used in a tower orientation. The HP logo plate on the front bezel is adjustable for either desktop or tower orientation. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 118 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 189
right side is facing down. Figure 8-72 Changing from Desktop to Tower Orientation NOTE: To stabilize the computer in a tower orientation, HP recommends the use of the optional tower stand. 9. remains clear and free of obstructions. Using the Small Form Factor Computer in a Tower Orientation 177 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 190
9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 191
computer. The slot next to the thumbscrew should be used when there is no port cover. The slot on the far right should be used when a port cover is installed. Figure 9-1 Installing a Cable Lock with No Port Cover Figure 9-2 Installing a Cable with a Port Cover Installed External Security Devices 179 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 192
Padlock Figure 9-3 Installing a Padlock HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. Figure 9-4 Securing the Cable to a Fixed Object 180 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 193
2. Thread the keyboard and mouse cables through the lock. Figure 9-5 Threading the Keyboard and Mouse Cables 3. Screw the lock to the chassis using the screw provided. Figure 9-6 Attaching the Lock to the Chassis External Security Devices 181 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 194
4. Insert the plug end of the security cable into the lock (1) and push the button in (2) to engage the lock. Use the key provided to disengage the lock. Figure 9-7 Engaging the Lock 182 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 195
Computer Access Panel To access internal components, you must remove the access panel: 1. Prepare the computer for disassembly (Preparation for Disassembly on page 178). 2. Loosen the thumbscrew on the rear of the computer (1), slide the access panel toward the front of the computer, and then lift - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 196
(2). Figure 9-10 Removing the Front Bezel 5. Replace the fan shroud. To install the front bezel, reverse the removal procedure. 184 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 197
Bezel Blank On some models, there is a bezel blank covering the external drive bay that needs to be removed before installing a drive. To remove a bezel blank: 1. Remove the computer access panel (Front Bezel on page 184). 2. Push the two retaining tabs that hold the bezel blank in place towards the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 198
supported NOTE: The system will not operate properly if you install unsupported SODIMMs. Refer to the Computer Setup (F10) Utility Guide for information on how to determine the processor bus frequency of a specific computer. 186 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 199
socket, Channel B White NOTE: A SODIMM must occupy the black DIMM1 socket. Otherwise, the system will display a POST error message indicating that a memory module must be installed in the black socket. The system will automatically operate in single channel mode, dual channel mode, or flex mode - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 200
2. Remove the computer access panel (Computer Access Panel on page 183). 3. Locate the memory module sockets on the system board. WARNING! To reduce risk of personal injury from hot (2). Figure 9-13 Removing a SODIMM 188 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 201
can be installed in only one way. Match the notch on the module with the tab on the memory socket. A SODIMM must occupy the DIMM1 (top) socket. 6. Replace the SODIMM in the DIMM1 socket if it was removed. 7. Replace the access panel. 8. If the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 202
major heat sources like the heatsink. ● Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them. ● Keep from its connector 190 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 203
Cable Connections System board connectors are color-coded to make it easier to find the proper connection. sensor ReadyBoost module Optical power Optical power Replacing the Optical Drive The Ultra-Slim Desktop uses a slimline Serial ATA (SATA) optical drive. Removing the Existing Optical Drive 1. - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 204
entire release latch firmly to fasten the latch securely to the optical drive. Figure 9-17 Aligning the Release Latch 192 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 205
Installing the New Optical Drive NOTE: If you are installing an optical drive in a bay that did not previously have a drive in it, you must remove the access panel and the bezel blank covering the opening of the bay before proceeding. Follow the procedures in Computer Access Panel on page 183 and - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 206
5. Pull the connector straight up to disconnect it from the system board. Figure 9-19 Removing the optical drive connector To install the optical drive connector, reverse the removal procedures. 194 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 207
Ultra-Slim Desktop supports only 2.5-inch Serial ATA (SATA) internal hard drives; parallel ATA (PATA) internal hard drives are not supported software drivers, and any software applications that were set, select Start > HP Backup and Recovery and Optical Drive on page 191 for instructions. 4. Press in the release - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 208
of the chassis. Figure 9-21 Removing the Hard Drive Carrier 6. To remove the hard drive from the carrier, remove the guide screw from the front left side of the carrier. Figure 9-22 Removing the Hard Drive Guide Screw 196 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 209
7. Slide the carrier back and remove the hard drive. Figure 9-23 Removing the Hard Drive 8. Transfer the three remaining guide screws (two on the right and one on the rear left) from the old drive to the new drive. Figure 9-24 Transferring the Guide Screws Hard Drive 197 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 210
Hard Drive in the Carrier 10. To place the hard drive carrier back in the chassis, align the guide screws with the slots on the drive bay, drop the carrier straight down into the drive bay (1), panel was removed. 198 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 211
hard drive, use the Recovery Disc Set that you created when you initially set up the computer to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. When the restore process has completed, reinstall any personal files that you backed - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 212
is secured in place by a retention lever just inside the port cover opening. To remove the port cover, pull the lever back towards the port cover opening (1), then slide the cover to the left and off the computer (2). 200 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 213
Figure 9-29 Removing a Port Cover Front Fan 1. Prepare the computer for disassembly (Preparation for Disassembly on page 178). 2. Remove the computer access panel (Computer Access Panel on page 183). 3. - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 214
to remove it from the chassis. Figure 9-31 Removing the speaker To install the speaker, reverse the removal procedure. 202 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 215
Rear Fan 1. Prepare the computer for disassembly (Preparation for Disassembly on page 178). 2. Remove the computer access panel (Computer Access Panel on page 183). 3. Disconnect the fan control cable from the system board. 4. Remove the four screws that secure the fan to the chassis (1), slide the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 216
with the 4 captive screws and attach the heatsink control cable and the thermal sensor cable to the system board. 204 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 217
CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an X) to evenly seat the heatsink on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system board. Processor 1. Prepare - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 218
BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files Existing Optical Drive on page 191). 4. Remove the memory modules (Installing Additional Memory on page 186). 5. Remove the hard drive (Hard Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 219
board from the chassis. To install the system board, reverse the removal procedure. NOTE: When replacing the system board, you must also change the chassis serial number in the BIOS. System Board 207 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 220
a live AC wall socket. The lithium battery is only used when the computer is NOT connected to AC power. 208 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 221
CMOS settings will be cleared. Refer to the Computer Setup (F10) Utility Guide for information on backing up the CMOS settings. NOTE: HP encourages customers to recycle used electronic hardware, HP original print cartridges, and rechargeable batteries. For more information about recycling programs - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 222
the logo plate from the bezel (1). 5. Rotate the plate 90 degrees (2) then press the logo plate back into the bezel. Figure 9-39 Rotating the HP Logo Plate 6. Replace the front bezel. 7. Replace the access panel. 210 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 223
when the computer cover or access panel was removed. To change from the tower configuration to the desktop configuration, reverse the previous steps. NOTE: An optional Quick Release mounting bracket is available from HP for mounting the computer to a wall, desk, or swing arm. Changing from - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 224
pin assignments for many computer and workstation connectors. Some of these connectors may not be used on the product being serviced. Keyboard Connector and Icon Pin Signal 1 Data 2 Unused 3 Ground 4 +5 VDC 5 Clock 6 Unused Mouse Connector and Icon Pin Signal 1 Data 2 Unused - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 225
Ethernet RJ-45 Connector and Icon Ethernet AUI Connector and Icon Pin Signal 1 Ground 2 Negative AUI Differential Collision 3 Positive AUI Differential Collision 4 Negative AUI Differential Transmit 5 Positive AUI Differential Transmit 6 Ground 7 Ground 8 Negative AUI Differential - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 226
11 Busy 12 Paper End 13 Select 14 Auto Linefeed 15 Error 16 Initialize Printer 17 Select IN 18-25 Signal Ground Serial Interface, Powered and Non-Powered Connector and Icon Pin Signal 1 Carrier Detect (12V if powered) 2 Receive Data 3 Transmit Data 4 Data Terminal Ready - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 227
USB Connector and Icon Microphone Connector and Icon (1/8" miniphone) 1 23 Headphone Connector and Icon (1/8" miniphone) 1 23 Line-in Audio Connector and Icon (1/8" miniphone) 1 23 Line-out Audio Connector and Icon (1/8" miniphone) 1 23 Pin Signal 1 +5 VDC 2 - Data 3 + Data 4 Ground Pin 1 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 228
Pin Signal 1 Red Analog 2 Green Analog 3 Blue Analog 4 Not used 5 Ground 6 Ground 7 Ground 8 Ground Pin Signal 9 +5V (fused) 10 Ground 11 Not used 12 DDC Serial Data 13 Horizontal Sync 14 Vertical Sync 15 DDC - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 229
ATA/ATAPI (IDE) Standard Drive Cable Connector Pin Signal 1 Reset 2 Ground 3 DD7 4 DD8 5 DD6 6 DD9 7 DD5 8 DD10 9 DD4 10 DD11 11 DD3 12 DD12 13 DD2 14 DD13 Pin Signal 15 DD1 16 DD14 17 DD0 18 DD15 19 Ground 20 (Key) 21 DMARQ 22 Ground 23 DIOW 24 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 230
A Connector Pin Assignments Pin Signal 40 +5V 41 +5V 42 +5V 43 GND 44 GND 45 GND 46 GND 47 CSEL 48 GND 49 Vendor-specific 50 Vendor-specific Pin Signal 19 GND 20 open 21 +5V 22 +5V 23 +5V 24 GND - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 231
24-Pin MicroFit Power (CMT, SFF) Connector 24 12 Pin Signal 1 +5 Vaux 2 GND 3 +5V 4 +5V 5 PS_ON 6 1 GND 2 GND 3 +12V CPU 4 -12V CPU 6-Pin Power (for CPU) (CMT, SFF) Connector and Icon 4 6 Pin Signal 1 GND 2 GND 3 GND 4 12V CPU 5 12V CPU 6 +12V 24-Pin - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 232
S1 Ground S5 BP1 Ground P5 BP9 V 5 P13 V 12 S = Data, P = Power Pin Signal S2 A+ S6 B+ P2 V 3.3 P6 Ground P10 Ground P14 V12 PCI Express x1, x4, x8, and x16 PCI Express Connector Pin Signal S3 AS7 Ground P3 V 3.3 P7 V 5 P11 Reserved P15 V 12 Pin Signal S4 Ground P4 Ground P8 V 5 P12 Ground - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 233
PERp15 NOTE: x1 PCI Express uses pins 1-18 x4 PCI Express uses pins 1-32 x8 PCI Express uses pins 1-49 x16 PCI Express uses pins 1-8 62 GND 63 GND 64 PERp11 65 PERn11 PCI Express x1, x4, x8, and x16 PCI Express Connector 67 46 PETn7 47 GND 48 PRSNT2# 49 GND 50 PETp8 71 PETn13 PCI Express 221 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 234
82 RSVD 78 PETp15 79 PETn15 80 GND NOTE: x1 PCI Express uses pins 1-18 x4 PCI Express uses pins 1-32 x8 PCI Express uses pins 1-49 x16 PCI Express uses pins 1-8 62 PETp11 63 PETn11 64 GND 65 GND PCI Express Mini Card PCI Express Mini Card Connector 67 PETn12 68 GND 69 GND 70 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 235
34 GND 40 GND 46 LED_WPAN# 36 GND 41 Reserved* 47 Reserved* 36 USB_D- 42 LED_WWAN# 48 +1.5V NOTE: *Reserved for future second PCI Express LAN (if needed) **Reserved for future wireless coexistence control interface (if needed) ***Reserved for future UIM interface (if needed) 49 Reserved - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 236
B Power Cord Set Requirements The power supplies on some computers have external power switches. The voltage select switch feature on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. Power supplies on those computers that do not have external power - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 237
Requirements Additional requirements specific to a country are shown in parentheses and explained configuration. 3. Appliance coupler, flexible cord, and wall plug must bear a "T" mark and registration number in accordance with the Japanese Dentori Law. Flexible cord must be Type VCT or VCTF, 3- - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 238
the error condition. POST Message Disabled suppresses most system messages during POST, such as memory count and non-error text messages. If a POST error occurs, the screen will display the error message. To manually switch to the POST Messages Enabled mode during POST, press any key (except F10 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 239
time or date in configuration memory. RTC (real-time clock) battery may need to be replaced. Reset the date and time under Control Panel (Computer Setup can also be used). If the problem persists, replace the RTC battery. See the Hardware Reference Guide for instructions on installing a new battery - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 240
has the same amount of memory. 219-ECC Memory Module Detected ECC Modules not supported on this Platform Recently added memory module(s) support 1. If additional memory was recently ECC memory error correction. added, remove it to see if the problem remains. 2. Check product documentation for - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 241
possible). 510-Flash Screen Image Corrupted Flash Screen image has errors. Reflash the system ROM with the latest BIOS image. 511-CPU, CPUA, or CPUB Fan not Detected CPU fan is not connected or may have Reconnect or replace front USB harness. POST Numeric Codes and Text Messages 229 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 242
problem with this Try rebooting the system. If the error device and the system or PCI Express Link reoccurs, the device may not work with this could not be retrained to an x1. system 1151-Serial Port at http://www.hp.com/support.) 3. Back up supported by ROM BIOS. 1. Upgrade BIOS to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 243
Table C-1 Numeric Codes and Text Messages (continued) Control panel message Description Recommended action 2200-PMM Allocation Error during MEBx Download Memory error during POST execution of the 1. Management Engine (ME) BIOS Extensions option ROM. 2. Reboot the computer. Unplug the power - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 244
latest BIOS version. 3. If the error still persists, replace the system board. 2211-Memory not configured correctly for proper MEBx execution. DIMM1 is not installed. Make sure there is a memory module in the black DIMM1 socket and that it is properly seated. Invalid Electronic Serial Number - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 245
determine the front panel LED codes. Recommended actions in the following table are Beeps stop after fifth iteration but LEDs continue until problem is solved. Computer on. None Computer in Suspend to RAM . 4. Contact an authorized reseller or service provider. Processor not installed (not an - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 246
. Replace the power supply adapter with the HP-supplied USDT power supply adapter. Red Power LED flashes five 5 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Pre-video memory error. CAUTION: To avoid damage to - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 247
by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Invalid ROM based on bad 1. checksum. Reflash the system ROM with the latest BIOS image. See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide for more information - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 248
Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4. Check to see if the 5V_aux light on the system board is turned on. If it is turned on, then replace the power button harness. If the problem persists, replace the system board. 5. If - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 249
, try the appropriate solutions below to try to isolate the exact problem before calling for technical support. ● Run the HP diagnostic tool. ● Run the hard drive self-test in Computer Setup. Refer to the Computer Setup (F10) Utility Guide for more information. ● Check the Power LED on the front of - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 250
: ● Be in front of your computer when you call. ● Write down the computer serial number, product ID number, and monitor serial number before calling. ● Spend time troubleshooting the problem with the service technician. ● Remove any hardware that was recently added to your system. ● Remove any - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 251
. See Solving Hardware Installation Problems on page 259 for instructions. ● Be sure that all the needed device drivers have been installed. For example sure that it is supported on the system. ● If the system has multiple video sources (embedded, PCI, or PCI-Express adapters) installed (embedded - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 252
used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Hardware Reference Guide for instructions on installing a new battery, or contact an authorized dealer can be disabled (or enabled) in Computer Setup. 240 Appendix D Troubleshooting Without Diagnostics - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 253
Problems (continued) There is no sound or sound volume is too low. Cause System volume may be set low or muted. Solution 1. Check the F10 BIOS for manually disabling the Smart Cover Lock, is available from HP. memory. Hard drive fragmented. Program previously accessed did not release reserved memory - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 254
Problems application. 2. Add more memory. 3. Upgrade the graphics second pause, and the computer beeps two times. (Beeps stop after fifth iteration but heatsink/fan assembly. 4. Contact an authorized reseller or service provider. System does not power on and the Troubleshooting Without Diagnostics - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 255
once every second, followed by a two second pause, and the computer beeps two times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Processor thermal protection heatsink/fan assembly. 4. Contact an authorized reseller or service provider. Solving Power Problems 243 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 256
with the HP-supplied USDT power supply adapter. Solving Diskette Problems Common causes and solutions for diskette problems are listed Solving Hardware Installation Problems on page 259 for instructions. Table D-3 Solving Diskette Problems Diskette drive light Troubleshooting Without Diagnostics - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 257
Table D-3 Solving Diskette Problems (continued) Drive not found. Cause Cable is loose. Removable drive is not seated properly. The device has been the locking device on the diskette. Enter Computer Setup and enable Legacy Diskette Write in Storage > Storage Options. Solving Diskette Problems 245 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 258
occurred with a disk transaction. Cause Solution The directory structure is bad, or there is a problem with a file. In Microsoft Windows XP, right-click Start, click Explore, and select a drive Network Server Mode in Security > Password Options. 246 Appendix D Troubleshooting Without Diagnostics - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 259
it is listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed drive, Device Available Computer Setup. is selected for the device's SATA port in Security > Device Security. Drive responds slowly immediately after - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 260
Drive Problems (continued . Cause Solution The device is attached to a SATA port that has been hidden in Run the Computer Setup utility to determine possible causes for the blinking red and beep codes. See the Worldwide Limited Warranty for terms and conditions Troubleshooting Without Diagnostics - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 261
properly seated in the carrier. The removable hard drive enclosure is beeping and the green LED is flashing. Cause Solution Fan failure alarm on contact HP for a replacement been activated. enclosure. Solving Media Card Reader Problems Table D-5 Solving Media Card Reader Problems Media - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 262
Problems (continued) A write-protected or locked error occurs when attempting to write to the media card. Cause Solution Media card is locked. Locking the media card is a safety feature that prevents writing to and deleting from an SD/Memory not supported. ports, and then recognize the PC - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 263
media card during the boot process. Solving Display Problems If you encounter display problems, see the documentation that came with the monitor and beeps). Reflash the system ROM with the latest BIOS image. See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 264
to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Blank screen and the power LED flashes Red six times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 265
Solving Display Problems (continued) the correct graphics Install the video drivers included in the upgrade kit. drivers may not be loaded. Monitor monitor. Refer to the documentation that came with the monitor for instructions. Image is not centered. Cause Position may need adjustment. Solution - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 266
Problems (continued) "Out of Range" displays on screen. Cause Solution Video resolution and refresh rate are set higher than what the Restart the computer and enter Safe Mode. Change the monitor supports. settings to a supported Manually www.hp.com/support Graphics not support that particular - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 267
correct. Cause Solution Tools > Character Map. You can copy the symbol from the Character Map into a document. Solving Audio Problems If the computer has audio features and you encounter audio problems, see the common causes and solutions listed in the following table. Table D-7 Solving Audio - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 268
Problems driver or application In the audio driver or application software, reconfigure the jack software. or set the jack to its default value. Solving Printer Problems If you encounter printer problems following table. Table D-8 Solving Printer Problems Printer will not print. Cause Solution - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 269
Solving Printer Problems (continued) Printer will not print. Cause Solution The correct printer drivers for the application are not installed. 1. Install the correct printer driver for the application. 2. Try printing using the MS-DOS command: DIR C:\ > [printer port] where [printer port] is - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 270
connected. 1. On the Windows XP Desktop, click Start > Shut Down. On the Windows Vista Desktop, click Start, click the arrow disabled (or enabled) in Computer Setup. Table D-10 Solving Mouse Problems Mouse does not respond to movement or is too slow. Cause Troubleshooting Without Diagnostics - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 271
mouse cleaning kit available from most computer stores. Solving Hardware Installation Problems You may need to reconfigure the computer when you add or remove of changes to the configuration, Reboot the computer and follow the instructions for accepting you did not accept them. the changes. A - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 272
correct memory modules and to verify the proper installation. NOTE: DIMM 1 must always be installed. 2. Observe the beeps and LED lights on the front of the computer. Beeps and flashing LEDs are codes for specific problems. 3. If you still cannot resolve the issue, contact Customer Support. Power - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 273
Table D-11 Solving Hardware Installation Problems (continued) Power LED flashes Red six times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution For systems with integrated graphics, - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 274
Problems (continued) Wake-on-LAN feature is not functioning. Cause Solution 6. Click the Configure button. 7. Click the Power Management tab, then select the check box to Allow this device to wake the computer. Network driver driver or obtain the latest driver driver There is a problem with the - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 275
an authorized service provider. New network card will not boot. Cause Solution New network card may be defective or may not meet industry- Install a working, industry-standard NIC, or change the boot standard specifications. sequence to boot from another source. Solving Network Problems 263 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 276
Remote System Installation Server contains the NIC drivers for your NIC. System setup utility reports unprogrammed EEPROM. Cause Unprogrammed EEPROM. Solution Contact an authorized service provider. Solving Memory Problems If you encounter memory problems, some common causes and solutions are - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 277
pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Memory is installed incorrectly or third-party memory with HP memory. 4. Replace the system board. Solving Processor Problems If you encounter processor problems, common - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 278
does not support a feature Problems If you encounter CD-ROM or DVD problems Problems System will not boot from CD-ROM or DVD drive. Cause Solution The device is attached to a SATA port SATA port in Problems driver problem. If it is not listed, the probable cause is a hardware problem SATA port in - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 279
Solving CD-ROM and DVD Problems (continued) CD-ROM or DVD devices are not detected or driver is not loaded. Cause Solution the device. 2. Restart the computer and let Windows detect the CD or DVD driver. Recording or copying CDs is difficult or impossible. Cause Wrong or poor quality media - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 280
Device: Supported USB Flash Media Device" section of the Service Reference Guide. The computer boots to DOS after making a bootable flash drive. Cause Solution Flash drive is bootable. Install the flash drive only after the operating system boots. 268 Appendix D Troubleshooting Without - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 281
Turn off the computer. The device does not have power. The correct device driver is not installed. The cable from the device to the computer does not enable the USB ports. Solving Internet Access Problems If you encounter Internet access problems, consult your Internet Service Provider (ISP) or - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 282
small piece of information that a Web server can store temporarily with the Web browser. This is useful for having the browser remember some specific Device Manager button. 5. Double-click Modems. 6. Double-click Agere Systems PCI-SV92PP Soft Modem. 7. On the General tab, click Diagnostics. 8. Click - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 283
. ● Be sure that all the needed device drivers have been installed. ● If you have installed an operating system other than the factory-installed operating system, check to be sure it is supported on the system. If you encounter software problems, see the applicable solutions listed in the following - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 284
Solving Software Problems (continued) hp.com. NOTE: If you take the computer to an authorized reseller, dealer, or service provider for service, remember to provide the setup and power-on passwords if they are set. Refer to the number listed in the warranty or in the Support Telephone Numbers guide - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 285
Board Reference Designators These reference designators are used on most but not all HP system and riser boards. Designator BAT CR1 CR2 CR3 CR4 E14 E15 E16 Second IEEE 1394 connector SPDIF input SPDIF output PCI slots PCI extender slot (male) PCI Express X1 slots PCI Express x16 graphics slot 273 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 286
JP49/E49 L1 L2 PCI Express x4 graphics slot First parallel port Second parallel port Double-stacked parallel port, Top = Port B, Bottom = Port A Parallel port over single Serial Port Parallel port over Serial Port and Video Port Parallel port over dual VGA ports Display port connector DVI connector - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 287
Header for front panel USB P25 Internal USB connector 1 P26 Internal USB connector 2 P27 MultiBay header P29 SCSI LED connector P30 PCI extender slot (female) P40 Blade PC graphics connector (outboard) P41 Blade PC graphics connector (inboard) P52 Second serial port connector 275 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 288
P150 P151 P160 P216 SW2 SW50 Primary serial port/Connector for first serial port Double stack serial port, Top = Serial B, Bottom = Serial A Riser edge connector (male-mates with J30) Primary Serial ATA (SATA) connector Second Serial ATA (SATA) connector Third Serial ATA (SATA) connector Fourth - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 289
Parallel port diode array First serial port transceiver Second serial port transceiver TPM controller VRD controller USB front port power switch First USB rear port power switch Second USB rear port power switch Third USB rear port power switch Battery socket Memory slot Following memory slots - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 290
Y1 Y2 Y3 Y4 Y5/H5 Y6 L1-5 Primary (TH) system clock crystal Secondary (SMT) system clock crystal Primary NIC clock crystal Secondary NIC clock crystal RTC clock crystal/tie-down SATA-to-PATA crystal USB chokes 278 Appendix E System Board and Riser Board Reference Designators - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 291
CMT Specifications Table F-1 Specifications Desktop Dimensions Height 7.0 in 17.8 cm Width 17.63 in 44.8 cm Depth 17.8 in 45.2 cm Tower Dimensions Height 17.63 in 44.8 cm Width 7.0 in 17.8 cm Depth 17.8 in 45.2 cm Approximate Weight 26.4 lb 12.0 kg Weight Supported number - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 292
factor corrected power supply also has the added benefit of not requiring an input voltage range select switch. SFF Specifications Table F-2 Specifications Desktop Dimensions (in the desktop limit may be limited by the type and number of options installed. Relative Humidity (noncondensing) - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 293
USDT Specifications Table F-3 Specifications Desktop Dimensions (in the desktop position) Height Width Depth 2.60 in 9.90 in 10.00 in 6.6 cm 25.1 cm 25.4 cm (depth will increase if the computer is equipped with a port security bracket) Approximate Weight 6.95 lb Weight Supported and number of - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 294
2.2A @ 100VAC 1.1A @ 200VAC 1 This system utilizes an active power factor corrected external power supply. This allows the system to pass the CE mark power factor corrected power supply also has the added benefit of not requiring an input voltage range select switch. 282 Appendix F Specifications - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 295
assignments 217 audible codes 233 audio problems 255 B Backup and Recovery Manager 29 backwall, SFF removal and replacement 172 battery CMT removal and replacement 110 disposal 62 SFF removal and replacement 173 USDT removal and replacement 208 beep codes 233 bezel, removing 184 BIOS HPQFlash 33 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 296
, table 45 deployment tools, software 23 desktop conversion 113 diagnostic tool for hard drives 49 diagnostics utility 17 DIMMs. See memory disassembly preparation CMT 63 SFF 118 USDT 178 diskette drive installing 91, 150 removing 87, 147 diskette problems 244 drive installing optical drive 193 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 297
125 HP Business PC Security Lock 68, 123, 180 padlock 67, 122, 180 Smart Cover Lock 64, 119 M Management Technology 30 media card reader installing 91, 150 removing 87, 147 Media Card Reader problems 249 memory installing 75, 77, 128 populating sockets 76, 129 specifications 75, 128 memory module - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 298
memory 264 monitor 251 mouse 258 network 261 power 243 printer 256 processor 265 software 271 processor CMT removal and replacement 106 SFF removal and replacement 168 USDT removal and replacement 205 processor problems drive 143, 191 PCI card 81, 134 PCI Express card 81, 134 port cover 200 Smart - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 299
24 servicing computer 60 updating and management tools 25 Verdiem Surveyor 32 spare part number tamper-resistant wrench 61 Torx T-15 screwdriver 60 speaker CMT removal and replacement 101 SFF removal and replacement 165 USDT removal and replacement 202 specifications computer 279, 280, 281 memory 75 - HP Dc7900 | Service Reference Guide: HP Compaq dc7900 Business PC - Page 300
USDT BIOS download 33 Configuration Management 24 HP Business PC Security 27 HP Client Automation Center 28 HP Client Catalog for Microsoft SMS 29 HP Client Management Interface 26 HP Client Management Solutions 24 HP Client Manager from Symantec 29 HP Softpaq Download Manager 26 HP Support 30 HP
Service Reference Guide
HP Compaq dc7900 Business PC