Compaq dc5850 Service Reference Guide: HP Compaq dc5850 Business PC
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- Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 1
Service Reference Guide HP Compaq dc5850 Business PC - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 2
to change without notice. Microsoft and Windows are trademarks of Microsoft Corporation in the U.S. and other countries. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 4
iv About This Book - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 5
or Upgrading Device Drivers 1 HP Backup and Recovery Manager ...2 2 Computer Setup (F10) Utility Computer Setup (F10) Utilities ...3 Using Computer Setup (F10) Utilities 4 Computer Setup-File ...5 Computer Setup-Storage 6 Computer Setup-Security 9 Computer Setup-Power 12 Computer Setup - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 6
35 Unsupported USB Flash Media Device 37 Dual-State Power Button ...38 HP Web Site Support ...38 Industry Standards ...39 Asset Tracking and Security ...39 Password Security ...41 Establishing a Setup Password Using Computer Setup 41 Establishing a Power-On Password Using Computer Setup 42 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 7
Cable ...50 SATA Power Cable ...50 PATA Device Information ...51 ATA SMART Drives ...51 Hard Drive Capacities ...51 6 Identifying the Chassis, Routine Care, and Disassembly Preparation Chassis Designations ...52 Small Form Factor (SFF 52 Microtower (MT) ...53 Electrostatic Discharge Information - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 8
7 Removal and Replacement Procedures Microtower (MT) Chassis Serial Number Location ...60 Preparation for Disassembly ...61 External Security Devices ...62 Cable Lock ...62 Padlock ...62 HP Business PC Security Lock 63 Front Bezel Security ...65 Computer Access Panel ...66 Front Bezel ...67 Cable - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 9
110 HP Business PC Security Lock 111 Front Bezel Security 113 Computer Access Panel ...114 Front Bezel ...115 Bezel Blanks ...116 Using the Small Form Factor Computer in a Tower Orientation 117 Installing Additional Memory ...119 DIMMs ...119 DDR2-SDRAM DIMMs ...119 Populating DIMM Sockets 120 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 10
POST Diagnostic Front Panel LEDs and Audible Codes 179 Appendix D Troubleshooting Without Diagnostics Safety and Comfort ...182 Before You Call for Technical Support 182 Helpful Hints ...183 Solving General Problems ...185 Solving Power Problems ...189 Solving Diskette Problems ...190 Solving Hard - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 11
Solving Front Panel Component Problems 218 Solving Internet Access Problems ...219 Solving Software Problems ...221 Contacting Customer Support ...222 Appendix E System Board and Riser Board Reference Designators ...223 Appendix F Specifications Microtower Chassis ...229 Small Form Factor Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 12
xii - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 13
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, enter the model number of the computer, and press Enter. Installing - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 14
Backup and Recovery Manager, refer to the HP Backup and Recovery Manager User Guide by selecting Start > HP Backup and Recovery > HP Backup 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 15
password that controls access to Computer Setup (F10) Utility and the settings described in this section. ● Secure integrated I/O functionality, including the serial, USB, or parallel ports, audio, or embedded NIC, so that they cannot be used until they are unsecured. ● Enable or disable removable - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 16
specified ATA hard drive (when supported by drive). ● Enable or disable DriveLock security (when supported by drive). Using Computer Setup (F10) Utilities Computer Setup can be accessed only by turning the computer on or restarting the system. To access the Computer Setup Utilities menu, complete - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 17
Setup-File NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 2-2 Computer Setup-File Option Description System Information Lists: ● Product name ● SKU number (some models) ● Processor type/speed/stepping ● Cache size (L1/L2) (dual - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 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 diskette drive). Hard Disk ● None (prevents BIOS data accesses and disables it as a boot device). ● Hard - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 19
. For more information on RAID, go to 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, supplements, addendums, etc). Under - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 20
attached devices (such as a USB flash media device, diskette drive, hard drive, optical drive, or network interface card) are checked for a bootable device other than the default device specified in Boot Order, restart the computer and press F9 when the monitor light turns green. After POST is - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 21
to change Computer Setup options, flash the ROM, and make changes to certain plug and play settings under Windows. See the Troubleshooting Guide for more information. Power-On Password Allows you to set and enable power-on password. The power-on password prompt appears after a power cycle. If - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 22
of the passwords is successfully provided during a subsequent 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. 10 Chapter 2 Computer Setup (F10 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 23
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 Passwords. This setting - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 24
Computer Setup-Power NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 2-5 Computer Setup-Power Option Description OS Power Management ● ACPI S3 Hard Disk Reset-Enabling this causes the BIOS to ensure hard disks are ready to accept - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 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, FullBoot, or FullBoot every 1-30 days). ● POST messages (enable/disable - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 26
used by the operating system and reduces the power used by the computer in S5. ● Processor cache (enable/disable). ● Multi-Processor (enable/disable). This option may be used to disable multi-processor support under the OS. ● Integrated Graphics Memory Size (Automatic, 32M, 128M, 256M). This allows - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 27
DCH space for additional PCI cards which may need option ROM space. The default will be to have the NIC option-ROM-enabled. ● SATA RAID Option ROM Download (enable/disable). The BIOS contains an embedded SATA RAID option ROM to for RAID support. This can be temporarily disabled to save DCH space - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 28
a call to the Customer Support Center. NOTE: Third party devices may not be detected by HP Insight Diagnostics. Accessing HP Insight Diagnostics To access HP Insight Diagnostics, you must create a Recovery Disc Set then boot to the CD containing the utility. It can also be downloaded from http://www - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 29
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 controller information. Graphics-Shows - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 30
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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 31
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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 32
then remove the CD from the optical drive. Downloading the Latest Version of HP Insight Diagnostics 1. Go to http://www.hp.com. 2. Click the Software & Driver Downloads link. 3. Enter your product number (for example, dc5850) in the text box and press the Enter key. 4. Select your specific computer - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 33
Backup and Recovery Manager, refer to the HP Backup and Recovery Manager User Guide by selecting Start > HP Backup and Recovery > HP Backup 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 34
● 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 may vary by model or software version. Initial Configuration and Deployment The computer comes - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 35
and troubleshooting, and power management. NOTE: See HP Backup and Recovery Manager on page 2 for information on creating the Restore Plus! CD. HP Software Agent The management agent used by both HP Client Configuration Manager and HP Configuration Management Solution is pre-loaded on the computer - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 36
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 always attempt to PXE boot. Software Updating and Management HP provides several tools for managing and updating software on desktops - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 37
. To download HP SoftPaq Download Manager, visit http://h20331.www2.hp.com/Hpsub/cache/509658-0-0-225-121.html. HP System Software Manager HP System Software Manager (SSM) is a free utility that automates remote deployment of device drivers and BIOS updates for your networked HP business PCs. When - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 38
editions: ● The Basic 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 Basic Edition also - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 39
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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 40
maintain security and productivity for the managed organization. HP now offers a mechanism to streamline updates for HP systems within a Microsoft System Management Server management infrastructure. The HP Client Catalog for SMS contains software driver and patch information for desktop, mobile and - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 41
. For 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 42
Local Update-local enable/disable management of firmware updates ◦ LAN Controller-enable/disable integrated network controller ◦ ME Features Control-enable AMT, ASF, or none ◦ ME Power Control-configure management engine power policies ● Intel AMT Configuration ◦ Change AMT Password-required - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 43
'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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 44
hp.com/go/ssm/. HPQFlash The HPQFlash utility is used to locally update or restore the system 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 of the computer when prompted. 32 Chapter 4 Desktop - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 45
successfully reprograms the ROM, the system will automatically power off. 4. Remove the removable media used to upgrade the BIOS. 5. Turn the power on to restart the computer. NOTE: BitLocker prevents Windows Vista from booting when a CD containing the BIOS image file is in an optical drive. If - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 46
light turns green to access the utility. 5. If you are using a diskette, insert it now. 6. Click File > Replicated Setup > Save to Removable Media. Follow the instructions on the screen to create the configuration diskette or USB flash media device. 7. Turn off the computer to be configured and - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 47
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. 9. On the configuration - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 48
proceed. Data loss can occur. Check all USB ports for additional storage devices. If any are found, remove them, reboot the computer, and proceed from step 4. If none are found, either the system does not support the USB flash media device or the USB flash media device is defective. DO NOT proceed - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 49
SCSI, ATA RAID or SATA drives attached, turn off the computer 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 50
for instructions. If you have used a DOS version from Windows 9x, you may see a brief Windows logo screen. If you do not want this screen, add a zero-length file named LOGO.SYS to the root directory of the USB flash media device. Return to Copying to Multiple Computers on page 34. Dual-State Power - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 51
accessing, evaluating, and installing the latest support software easier. You can download the software from http://www.hp.com/support. The Web site contains the latest device drivers, utilities, and flashable ROM images needed to run the latest Microsoft Windows operating system on the HP computer - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 52
computer if the sensor detects that the cover has been removed. Embedded Security Allows you to: ● Enable/disable the Embedded Security device. ● Reset the device to Factory Settings. This feature is supported on some models only. See the HP ProtectTools Security Manager Guide at http://www.hp - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 53
Setup (F10) Utility Guide. Support for security features may vary depending on the specific computer configuration. Password Security The power-on password prevents unauthorized use of the computer by requiring entry of a password to access applications or data each time the computer is turned on - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 54
do not press F10 at the appropriate time, you must restart the computer and again press F10 when the monitor light turns green to access the utility. 3. Select Security, then Power-On Password and follow the instructions on the screen. 4. Before exiting, click File > Save Changes and Exit. Entering - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 55
, refer to the HP ProtectTools Security Manager Guide at http://www.hp.com. 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart the Computer. 2. To change the Power-On password, go to step 3. To change the Setup password, as soon as the computer is turned on - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 56
If you forget the password, you cannot access the computer. Refer to the 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.com. DriveLock DriveLock is - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 57
Sensor Protection Levels Level Setting Description Level 0 Disabled Smart Cover Sensor is disabled (default). Level 1 Notify User When the computer is restarted, the screen displays a message indicating that the computer cover or side panel has been removed. Asset Tracking and Security 45 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 58
a message indicating that the computer cover or side panel has been removed. You must enter the setup password to continue. NOTE: These settings can be changed using Computer Setup. For more information about Computer Setup, see the Computer Setup (F10) Utility Guide. Setting the Smart Cover - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 59
enter the password to disable the lock, you will need a Smart Cover FailSafe Key to open the computer cover. You will need the key in any of the following circumstances: ● Power outage ● Startup failure ● PC component failure (such as processor or power supply) ● Forgotten password CAUTION: The - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 60
The 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 on using DPS. Surge-Tolerant Power Supply An integrated surge-tolerant power supply provides greater reliability when the computer is - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 61
drives on these models of computer. The USDT model is the only product that supports a PATA optical drive. No PATA drives are supported on any other model. SATA Hard Drives Serial ATA Hard Drive Characteristics Number of pins/conductors in data cable Number of pins in power cable Maximum data cable - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 62
SATA Hard Drive Cables SATA Data Cable Always use an HP approved SATA 3.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s drives. Current HP desktop products ship with SATA 3.0 Gb/s hard drives. SATA data cables are susceptible to damage if overflexed. Never crease a SATA data - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 63
Information The 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 Personal Computers have built-in drive failure prediction that - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 64
system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage. Chassis Designations The following subsections illustrate the dc5750 chassis designs. Small Form Factor (SFF) 52 Chapter 6 Identifying the Chassis, Routine - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 65
Microtower (MT) but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions. worker 400 V Removing DIPs* from plastic tube 400 V Removing DIPs* from vinyl tray 2,000 V Removing DIPs* from Styrofoam 3,500 V Removing bubble pack from - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 66
To avoid hand contact, transport products in static-safe containers such as straps/Boot straps can be used at standing workstations and are compatible with most types of shoes or boots. On conductive floors ● Turn off power and input signals before inserting and removing connectors or test equipment - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 67
dissipative table or floor mats with hard tie to ground ● Field service kits ● Static awareness labels ● Wrist straps and footwear straps against the front of the desktop unit as this also restricts airflow. ● Occasionally clean the air vents on all vented sides of the computer. Lint, dust, and - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 68
with the cover or side panel removed. ● Do not stack computers on top of each other or place computers so near each other that they are subject to each other's re-circulated or preheated air. ● If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 69
the Computer Case on page 56. When cleaning debris from under the keys, review all rules Computer Case on page 56. Service Considerations Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer. Power Supply Fan The power supply - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 70
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 (may sometimes be used in place of the Torx - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 71
computer provides power to the real-time clock and has a minimum lifetime of about three years. See the appropriate removal and replacement chapter for the chassis you are working on in this guide for instructions them to HP, their authorized partners, or their agents. Service Considerations 59 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 72
all computers. Serial Number Location Each computer has a unique serial number and product ID number that are located on the top cover of the computer. Keep these numbers available for use when contacting customer service for assistance. 60 Chapter 7 Removal and Replacement Procedures Microtower (MT - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 73
Exit the operating system. 4. Remove any diskette, compact disc, or media card from the computer. 5. Turn off the computer and any peripheral devices that are connected to it. CAUTION: Turn off the computer before disconnecting any cables. Regardless of the power-on state, voltage is always present - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 74
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. Cable Lock Padlock 62 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 75
HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. 2. Thread the keyboard and mouse cables through the lock. External Security Devices 63 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 76
3. Screw the lock to the chassis using the screw provided. 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. 64 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 77
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) and install it through the chassis frame into the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 78
the captive thumbscrew (1) that secures the access panel to the computer chassis. 3. Slide the access panel back (2) about 1.3 cm (1/2 inch), then lift it off the unit. To install the access panel, reverse the removal procedure. 66 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 79
for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Press outward on the two latches on the right side of (2) to release the top of the bezel. To reinstall the front bezel, reverse the removal procedure. Front Bezel 67 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 80
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 cable could damage the cable and result in a failed power supply. 68 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 81
dynamic random access memory (DDR2SDRAM) dual inline memory modules (DIMMs). The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory support, you can - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 82
B, and socket XMM3 is populated before socket XMM1 in Channel A. ● If a single DIMM is installed, it must be installed in the XMM4 socket. ● In either mode, the maximum operational speed is determined by the slowest DIMM in the system. 70 Chapter 7 Removal and Replacement Procedures Microtower (MT - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 83
on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching. 3. Open both latches of the memory module socket (1), and insert the memory module into the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 84
on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Locate the correct vacant expansion socket on the system board and the corresponding expansion slot on the back of the computer chassis. 72 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 85
the expansion slot cover or the existing expansion card. NOTE: Before removing an installed expansion card, disconnect any cables that may be attached to the expansion card. a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion slot cover on the back of - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 86
frame. Be sure not to scrape the card against the other components. 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. 74 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 87
it snaps securely in place. 10. Connect external cables to the installed 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. Expansion Cards 75 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 88
power supply. The hard drive uses 6-32 isolation mounting guide screws. All other drives use M3 metric screws. The HP-supplied metric guide screws (1) are black. The HP-supplied 6-32 isolation mounting guide screws (2) are silver and blue. Figure 7-2 Extra Guide Screws Location 76 Chapter 7 Removal - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 89
CAUTION: To prevent loss of work and damage to the computer or drive: If you are inserting or removing a drive, shut down the operating system properly, turn off the computer, and unplug the power cord. Do not remove a drive while the computer is on or in standby mode. Before handling a drive, - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 90
No. System Board Connector System Board Label 1 Diskette Drive FLPY 2 Media Card Reader MEDIA 3 SATA0 SATA0 4 SATA1 SATA1 5 SATA2 SATA2 6 SATA3 SATA3 Color black black dark blue white light blue orange 78 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 91
optical drives shown) 2 One 3.5-inch external drive bay for optional drive (media card reader shown) 3 Primary 3.5-inch internal hard drive bay 4 Secondary 3.5-inch internal installed in the computer, run Computer Setup. Refer to the Computer Setup (F10) Utility Guide for more information. Drives 79 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 92
page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the front bezel (Front Bezel on page 67). 4. Disconnect the drive cables, as indicated in the following illustrations. a. If you are removing a 5.25-inch optical drive, disconnect the power cable (1) and data - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 93
card reader, disconnect the USB cable from the system board. 5. A latch drive bracket with release tabs secures the drives in the drive bay. Lift the release tab on the latch drive bracket (1) for the drive you want to remove, then slide the drive from its drive bay (2). 6. Remove the four guide - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 94
each side) that were removed from the old drive into the new drive. The screws help guide the drive into its proper position in the bay. Extra guide screws are provided on the interior of the chassis frame next to the power supply. NOTE: Optical drives, diskette drives, and media card readers use M3 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 95
the drive bay, making sure to align the guide screws with the guide slots, until the drive snaps into place. 4. Connect the power and data cables to the drive as indicated in the following illustrations. a. If you are installing an optical drive, connect the power cable (1) and data cable (2) to the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 96
and power card reader, connect the USB cable from the media card reader to the USB connector on the system board labeled MEDIA. Refer to System Board Drive Connections on page 78 for an illustration of the system board drive connectors. 84 Chapter 7 Removal and Replacement Procedures Microtower (MT - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 97
select Start > HP Backup and Recovery and create it now. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the front bezel (Front Bezel on page 67). 4. Disconnect the power cable (1) and - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 98
The hard drive uses 6-32 isolation mounting guide screws. Four extra guide screws are installed on the interior of the chassis frame next to the power supply. The HP-supplied isolation mounting guide screws are silver and blue. Refer to Installing and Removing Drives on page 130 for an illustration - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 99
panel. 7. Reconnect the power cord and any external devices, then turn on the computer. 8. Lock any security devices that were disengaged when the access panel was removed. NOTE: If you are replacing the primary hard drive, use the Recovery Disc Set to restore the operating system, software drivers - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 100
, make sure you have created 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 with the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 101
4. Remove the four screws from the bottom of the hard drive carrier. 5. Slide the hard drive back to disconnect it from the carrier then lift it up and out of the carrier. Drives 89 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 102
connector on the carrier's circuit board. 7. Replace the four screws in the bottom of the carrier to hold the drive securely in place. 90 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 103
the screw on the rear of the carrier to secure the cover in place (2). 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 power to be supplied to the hard drive. Drives 91 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 104
the card. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect the main power cable from the system board and push it aside. 4. Use tweezers or a small needle-nose pliers to compress - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 105
Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the hard drive cable from the and out of the chassis. To reinstall the processor baffle, reverse the removal procedure. When reinstalling the processor baffle, first insert the two tabs on the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 106
Remove the computer access panel (Computer Access Panel on page 66). 3. Unplug the fan cable from the system board (CHFAN, P9). 4. Remove the processor baffle. 5. Remove the baffle. To reinstall the fan/air baffle, reverse the removal procedure. When reinstalling the baffle, be sure to thread the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 107
(Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the front bezel (Front Bezel on page 67). 4. Disconnect the front I/O cable from the blue system board connector (P6) and the USB cable from the yellow system board connector - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 108
Power Switch/LED Assembly 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the front bezel (Front Bezel on page 67). 4. Remove of the chassis. 8. Remove the assembly from the chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 109
1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). the pins on the socket are very fragile and any damage to them may require replacing the system board. 5. Remove the heatsink from the processor - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 110
the computer access panel (Computer Access Panel on page 66). 3. Remove the heatsink (Heatsink on page 97). 4. Rotate the locking lever to its full open position (1). 5. Raise and rotate the microprocessor retainer to its fully open position (2). 6. Carefully lift the processor from the socket - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 111
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. Speaker 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 112
for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect the fan control cable from the system board (P11, POWER FAN). 4. Remove the four silver Phillips screws that secure the fan to the chassis. 5. Lift the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 113
is installed in an expansion card slot, and you can use expansion card removal and replacement procedures to remove and install it. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 114
Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect all power cables from the drives and from the system board. 4. Remove the four silver T15 screws that connect the power supply to the chassis. 102 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 115
supply that holds it in place. 6. Slide the power supply toward the front of the computer, rotate toward the fan so the power supply clears the lip on the top of the chassis, and then lift the power supply out of the chassis. To install the power supply, reverse the removal procedure. Power Supply - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 116
, first insert the I/O panel back into the slots in the rear of the chassis, and then align the board with the chassis screw holes. NOTE: When replacing the system board, you must change the chassis serial number in the BIOS. 104 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 117
programs, go to http://www.hp.com/ recycle. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). NOTE: It may be necessary to remove an expansion card to gain access to the battery. 3. Locate the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 118
the battery in the proper position. 4. Replace the computer access panel. 5. Plug in the computer and turn 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 119
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 position the clip back in place. 3. Replace the computer access panel. 4. Plug in the computer and turn on power to the computer. 5. Reset the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 120
remove it, noting its position and routing. Keep all screws with the units removed. CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit. 108 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 121
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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 122
Padlock 110 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 123
HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. 2. Thread the keyboard and mouse cables through the lock. External Security Devices 111 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 124
3. Screw the lock to the chassis using the screw provided. 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. 112 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 125
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) and install it through the chassis frame into the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 126
). 2. Press the buttons on the left and right sides of the computer (1) then slide the access panel back until it stops and lift it up and off the chassis (2). To install the access panel, reverse the removal procedure. 114 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 127
for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Lift up the green latch behind the upper right side the chassis (2), followed by the left side. To replace the front bezel, reverse the removal procedures. Front Bezel 115 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 128
5. To remove the 5.25-inch bezel blank, push the two retaining tabs that hold the bezel blank in place towards the outer left edge of the bezel (1) and pull the bezel blank inwards to remove it (2). 6. Replace the front bezel. 116 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 129
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 61). 2. Remove the computer access panel (Computer Access Panel - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 130
the computer in a tower orientation, HP recommends the use of the optional tower stand. NOTE: Ensure at least 10.2 centimeters (4 inches) of space on all sides of the computer remains clear and free of obstructions. 118 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 131
Installing Additional Memory The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2SDRAM) dual inline memory modules (DIMMs). DIMMs The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 132
. Supported configurations consist of any combination of one, two, three, or four DIMMs as long as socket XMM4 is populated before socket XMM2 in Channel B, and socket XMM3 is populated before socket XMM1 in Channel A. 120 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 133
for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Rotate up the external 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 134
Make sure the latches are in the closed position (3). 6. Repeat steps 4 and 5 to install any additional modules. The computer should automatically recognize the additional memory the next time you turn on the computer. 122 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 135
x16 expansion slot. To install an expansion card: 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Locate the correct vacant expansion socket on the system board and the corresponding expansion - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 136
the expansion card. a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion slot cover on the back of the chassis. Pull the slot cover straight up then away from the inside of the chassis. 124 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 137
it from the chassis frame. Be sure not to scrape the card against the other components. 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 card back and forth until the connectors pull free from the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 138
: When installing an expansion card, press firmly on the card so that the whole connector seats properly in the expansion card slot. 9. Rotate the slot cover retention latch back in place to secure the expansion card. 126 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 139
cables to the installed 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. Cable Management The Small Form Factor chassis is very compact - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 140
coded to make it easier to find the proper connection. Cable Power Supply Power Supply Power Supply Power Supply Power Supply Power Supply To System board, 24-pin CPU power (Black) P9, CHFAN (red) P150, MEDIA (black) 128 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 141
remove and install the guide screws on a drive. CAUTION: Make sure personal files on the hard drive are backed up to an external storage device before removing HP factory-installed files. Drive Positions 1 3.5-inch internal hard drive bay 2 3.5-inch external drive bay for optional drives (media card - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 142
HP-supplied standard screws are silver. If you are replacing the primary 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. 130 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 143
CAUTION: To prevent loss of work and damage to the computer or drive: If you are inserting or removing a drive, shut down the operating system properly, turn off the computer, and unplug the power cord. Do not remove a drive while the computer is on or in standby mode. Before handling a drive, - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 144
No. System Board Connector 1 Diskette Drive 2 Media Card Reader 3 SATA0 4 SATA1 5 SATA2 6 SATA3 System Board Label FLPY MEDIA SATA0 SATA1 SATA2 SATA3 Color black black dark blue white light blue orange 132 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 145
before removing the drive from the computer. To remove an optical drive: 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Rotate the drive cage to its upright position. 4. Disconnect the power cable - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 146
Access Panel on page 114). 3. If you are installing a drive in a bay covered by a bezel blank, remove the front bezel then remove the bezel blank. See Front Bezel on page 115 and Bezel Blanks on page 116 for more information. 134 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 147
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 130 for an illustration of the extra M3 metric guide screws location. CAUTION: Use only - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 148
frame under the drive cage. Ensure that the 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. 136 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 149
the external 3.5-inch drive. 1. Follow the procedure in Removing an Optical Drive on page 133 to remove the optical drive and access the 3.5-inch drive. CAUTION: Ensure that the computer is turned off and that the power cord is disconnected from the electrical outlet before proceeding. Drives - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 150
: a. If you are removing a diskette drive, disconnect the data cable (1) and power cable (2) from the back of the drive. b. If you are removing a media card reader, disconnect the USB cable from the system board. 138 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 151
on page 130 for illustrations of the guide screw locations. 1. Follow the procedure in Removing an Optical Drive on page 133to remove the optical drive and access the 3.5-inch drive bay. CAUTION: Ensure that the computer is turned off and that the power cord is disconnected from the electrical - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 152
media card reader to the USB connector on the system board labeled MEDIA. NOTE: Refer to System Board Drive Connections on page 132 for an illustration of the system board drive connectors. 5. Replace the optical drive. 140 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 153
Start > HP Backup and Recovery and create it now. The preinstalled 3.5-inch hard drive is located under the power supply. To remove and replace the hard drive: 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 154
4. Rotate the power supply to its upright position. The hard drive is located beneath the power supply. 5. Disconnect the power cable (1) and data cable (2) from the back of the hard drive. 142 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 155
it stops, then lift the drive up and out of the bay (2). 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. Drives 143 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 156
normal positions. NOTE: If you are replacing the primary hard drive, use the Recovery Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. 144 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 157
can be quickly and easily removed from the drive bay. To remove and replace a drive in the carrier: NOTE: Before you remove the old hard drive, be , 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 158
4. Remove the four screws from the bottom of the hard drive carrier. 5. Slide the hard drive back to disconnect it from the carrier then lift it up and out of the carrier. 146 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 159
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 connector on the hard drive is pressed all the way into the connector on the carrier's circuit board. 7. Replace the four screws in the bottom - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 160
to secure the cover in place (2). 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 power to be supplied to the hard drive. 148 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 161
Cable Routing When servicing the computer, please note the original locations of the cables and how they are routed in the chassis base. Make sure to replace all cables to their proper locations when reassembling the computer. The image below illustrates proper cable routing. Cable Routing 149 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 162
Remove the access panel (Computer Access Panel on page 114). 3. Unplug the ReadyBoost cable from the system board, and then lift the card assembly from the chassis. To install the ReadyBoost card, reverse the removal procedure. 150 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 163
on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Lift the inner baffle straight up out of the chassis. To install the inner baffle, reverse the removal procedure. When reinstalling the inner baffle, be careful of the location of the power switch wire. Inner Baffle - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 164
loosen the tabs (2) from the front of the chassis, and then lift the assembly from the chassis. To install the fan/outer baffle, reverse the removal procedure. Be careful of the power switch wires when reinstalling. 152 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 165
Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Remove the front bezel (Front Bezel on page 115). 4. Remove the fan/outer baffle (Fan/Outer Baffle on page 152). 5. Rotate the drive cage to the upright position. 6. Unplug the power switch cable from the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 166
I/O device, reverse the removal procedure. When reinstalling the front I/O device, be sure to guide the cables through the opening in the drive cage directly behind the front I/O device slot in the front of the chassis. 154 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 167
. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 168
thermal grease to the top of the processor from the syringe supplied in the spares kit. 4. Apply the thermal grease provided in the spares kit to the top of the processor and install the heatsink atop the processor. 156 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 169
being used on the computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files. Speaker 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Remove the front bezel - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 170
the power supply brackets. 3. Push the power supply all the way down, and then press toward the rear of the unit until it snaps into place. The top of a properly installed power supply will set flush with the top of the chassis. 158 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 171
). 2. Remove the access panel (Computer Access Panel on page 114). 3. Remove all PCI and PCI Express expansion boards (Expansion Cards on page 123). 4. Remove the fan shroud from the chassis (Inner Baffle on page 151). 5. Rotate the drive cage to its upright position. 6. Rotate the power supply to - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 172
card to gain access to the battery. 3. Locate the battery and battery holder on the system board. 4. Depending on the type of battery holder on your system board, complete the following instructions to replace the battery: 160 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 173
the proper position. 4. Replace the computer access panel. 5. Plug in the computer and turn on power to the computer. 6. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 2 Battery Holder 1. To release - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 174
computer access panel. 4. Plug in the computer and turn on power to the 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. 162 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 175
A Connector Pin Assignments This appendix contains the 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 176
Data 4 Data Terminal Ready 5 Signal Ground 6 Data Set Ready 7 Request to Send 8 Clear to Send 9 Ring Indicator (5V if powered) USB Connector and Icon Pin Signal 1 +5 VDC 2 - Data 3 + Data 4 Ground Microphone Connector and Icon (1/8" miniphone) 1 23 Pin 1 (Tip) 2 (Ring - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 177
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 External Infrared Transceiver Connector and Icon 3 (Shield) Ground Pin 1 (Tip) 2 (Ring) 3 (Shield) Signal Audio_left Power_Right - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 178
Monitor Connector and Icon 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 Serial Clock 166 Appendix A - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 179
ATAPI (IDE) Standard Drive Cable Connector Pin Signal 1 Reset 2 Ground 3 DD7 4 DD8 5 DD6 6 PDIAG (cable detect) 35 DA0 36 DA2 37 CS1FX 38 CS3FX 39 DASP 40 Ground 24-Pin Power (CMT and MT models) Connector 24 12 Pin Signal 1 +3.3V 2 +3.3V 3 GND 4 +5V 5 GND - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 180
Signal 19 GND 20 +3.3V 21 Sense 22 +3.3V 23 +3.3V 24 GND -12V 4-Pin Power (for CPU) (MT and CMT models) Connector and Icon Pin Signal 1 GND 2 GND 3 +12V CPU 4 -12V CPU 6-Pin Power (for CPU) (USDT, SFF, and ST models) Connector and Icon 4 6 Pin Signal 1 GND 2 GND 3 GND 4 12V - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 181
Drive Connector Pin Signal 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 GND 24 GND 25 PERp2 46 GND 47 PERp7 48 PERn7 49 GND 50 RSVD 71 GND SATA Data and Power 169 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 182
52 PERp8 57 PERn9 53 PERN8 58 GND 54 GND 59 GND 55 GND 60 PERp10 76 PERp14 81 PERn15 77 PERn14 82 GND 78 GND 79 GND 80 PERp15 Pin B information is on the next page 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 183
Express uses pins 1-8 61 GND 62 PETp11 63 PETn11 64 GND 65 GND DVI Connector Connector and Icon 66 PETp12 67 PETn12 68 GND 69 GND 70 PETp13 Data1/3 Shield 12 T.M.D.S. Data3- Pin Signal 13 T.M.D.S. Data3+ 14 +5V Power 15 Ground (for +5V) 16 Hot Pug Detect 17 T.M.D.S. Data0- 18 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 184
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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 185
Additional requirements specific to a be Type HO5VV-F, 3-conductor, 0.75mm2 conductor size. Power cord set fittings (appliance coupler and wall plug) 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 186
sequences that you may encounter during Power-On Self-Test (POST) or computer restart, the probable source of the problem, and steps you can take to resolve the error condition. POST Message Disabled suppresses most system messages during POST, such as memory count and non-error text messages - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 187
was recently added, remove it to see if the problem remains. 2. In Computer Setup, set Advanced > Device Options > NIC PXE Option ROM Download to DISABLE to prevent PXE option ROM for the internal NIC from being downloaded during POST to free more memory for an expansion card's option ROM. Internal - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 188
3. If third-party memory has been added, test using HP-only memory. 4. Verify proper memory module type. 201-Memory Error RAM failure. 1. Run Computer Setup or Windows utilities. 2. Ensure memory modules are correctly installed. 3. Verify proper memory module type. 4. Remove and replace the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 189
3. Verify monitor is attached and turned on. 4. Replace the graphics card (if 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 malfunctioned - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 190
is missing. Enter the correct serial number in Computer Setup. Memory Parity Error Parity RAM failure. Run Computer Setup and Diagnostic utilities. Third-party graphics card may be causing a Remove third-party graphics card to see if the problem. problem goes away. Network Server Mode Active - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 191
system still has power. Power off the computer and remove the power cord before proceeding. NOTE: If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes. Recommended actions in - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 192
memory with HP memory. 4. Replace the system board. Red Power LED flashes six 6 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Pre-video graphics error. For systems with a graphics card: 1. Reseat the graphics - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 193
the system board. 5. If the 5V_aux light on the system board is not turned on, remove the expansion cards one at a time until the 5V_aux light on the system board turns on. It the problem persists, replace the power supply. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 181 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 194
, optical drive, graphics, audio, memory, and software problems. If you encounter problems with the computer, refer to the tables in this chapter for probable causes and recommended solutions. NOTE: For information on specific error messages that may appear on the screen during Power-On Self-Test - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 195
is handled properly: ● Be in front of your computer when you call. ● Write down the computer serial number and product ID number, and the monitor serial number before calling. ● Spend time troubleshooting the problem with the service technician. ● Remove any hardware that was recently added to your - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 196
not restart, press the power button to start the computer. ● Reconfigure the computer after installing a non-plug and play expansion board or other option. See Solving Hardware Installation Problems on page 207 for instructions. ● Be sure that all the needed device drivers have been installed. For - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 197
prolongs the life of the RTC battery. First, reset the date and time under Control Panel (Computer Setup can also be 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 198
to the correct jack on the rear of the computer. rear of the computer. Poor performance is experienced. Cause Processor is hot. Hard drive is full. Low on memory. Hard drive fragmented. Program previously accessed did not release reserved memory back to the system. Virus resident on the hard - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 199
more memory. 3. Upgrade the graphics solution. Cause unknown. Restart the computer. Computer powered off automatically and the Power LED of the power supply on some models, is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Remove the expansion cards one at - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 200
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. 5. If the 5V_aux light on the system board is off, then replace the power supply. 6. Replace the system board. 188 Appendix D Troubleshooting Without Diagnostics - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 201
Open the hood and ensure the 4- or 6-wire power supply cable is seated into the connector on the system board. 2. Check if a device is causing the problem by removing ALL attached devices (such as hard, diskette, or optical drives, and expansion cards). Power on the system. If the system enters the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 202
computer when you add or remove hardware, such as an additional diskette drive. See Solving Hardware Installation Problems on page 207 for instructions. Table D-3 Solving Diskette Problems are disabled in Computer Setup. Diskette is damaged. Solution Format the diskette. 1. From Windows Explorer - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 203
files needed to start When drive activity stops, remove the diskette and press the the computer has been inserted in the drive. Spacebar. The computer should start up. Diskette error has occurred. Restart the computer by pressing the power button. Cannot Boot to Diskette. Cause Diskette is - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 204
Options > Removable Media Boot. NOTE: Both steps should be used as the Removable Media Boot function in Computer Setup overrides the Boot Order enable command. Run Computer Setup and disable Network Server Mode in Security > Password Options. 192 Appendix D Troubleshooting Without Diagnostics - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 205
is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed drive, run the Computer Setup utility and try adding a POST delay under Advanced > Power-On Options. The device is attached to a SATA port that has been disabled Run the Computer Setup - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 206
accessed. 3. Install system files for the appropriate operating system. 4. Restore the system to a recovery point in HP Backup and Recovery Manager. Refer to the HP Backup and Recovery Manager User Guide in the Windows Start menu for more information. Hard drive boot has been disabled in Computer - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 207
seated in the carrier. The removable hard drive enclosure is beeping and the green LED is flashing. Cause Solution Fan failure alarm on the removable hard drive enclosure has Shut down the computer and contact HP for a replacement been activated. enclosure. Solving Hard Drive Problems 195 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 208
eject the card. Solution Open My Computer (Windows XP) or Computer (Windows Vista), right-click on the corresponding drive icon, and select Eject. Then pull the card out of the slot. NOTE: Never remove the card when the green LED is flashing. 196 Appendix D Troubleshooting Without Diagnostics - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 209
Table D-5 Solving Media Card Reader Problems (continued) After installing the media card reader and booting to Windows, the reader and the inserted cards are not recognized by the computer. Cause Solution The operating system needs time to recognize the device if the Wait a few seconds so that - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 210
select the Settings tab. In Windows Vista Control Panel, under Appearance and Personalization, select Adjust screen resolution. 2. Use the sliding control to reset the resolution. Cannot enable integrated graphics after installing a PCI Express x16 graphics card. Cause Solution On systems with - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 211
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 flashing.) Cause Solution Pre-video graphics error. For - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 212
If the graphics controller was upgraded, the correct graphics Install the video drivers included in the upgrade kit. drivers may not be loaded. Monitor is not capable of displaying requested resolution. Change requested resolution. Graphics card is bad. Replace the graphics card. The picture - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 213
menu. Manually synchronize the Clock and Clock Phase onscreen display functions. To download a SoftPaq that will assist you with the synchronization, go to the following Web site, select the appropriate monitor, and download either SP32347 or SP32202: http://www.hp.com/support Graphics card is not - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 214
Audio Problems Sound cuts in and out. Cause Solution Processor resources are being used by other open applications. Direct sound latency, common in many media player applications. Shut down all open processor-intensive applications. In Windows XP only: 1. From the Control Panel, select Sounds - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 215
Audio Problems (continued) Sound does not come out of the speaker or headphones. Cause Solution CAUTION: When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data. Sound - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 216
following table. Table D-8 Solving Printer Problems Printer will not print. Cause Solution power cord and electrical outlet. Printer prints garbled information. Cause The correct printer driver for the application is not installed. The cables may not be connected properly. Printer memory - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 217
Problems Keyboard commands and typing are not recognized by the computer. Cause Solution Keyboard connector is not properly connected. 1. On the Windows XP Desktop The Num Lock key can be disabled (or enabled) in Computer Setup. Table D-10 Solving Mouse Problems Mouse does not respond to - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 218
, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will Remove roller ball cover from the bottom of the mouse and clean the internal components with a mouse cleaning kit available from most computer stores. 206 Appendix D Troubleshooting - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 219
correct memory modules and to verify the proper installation. 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. Solving Hardware Installation Problems 207 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 220
Replace third-party memory with HP memory. 4. Replace the system board. 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 Graphics card is not seated - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 221
Configure button. 7. Click the Power Management tab, then select the check box to Allow this device to wake the computer. Network driver does not detect network controller. Cause Network controller is disabled. Incorrect network driver. Solution 1. Run Computer Setup and enable network controller - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 222
Windows, such as Device Manager for driver load and the Network Connections applet within Windows for link status. Network controller is disabled. 1. Run Computer that the cable is attached to the correct connector. There is a problem with the cable or a device at the other end Ensure that the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 223
an expansion board was added to the computer. Cause Solution The network controller requires drivers. Verify that the drivers were not accidentally deleted when the drivers for a new expansion board were installed. The expansion board installed is a network card (NIC) and conflicts with the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 224
unplug the computer power cord before attempting to reseat, install, or remove a DIMM module. For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the computer will not boot the operating system. Table D-13 Solving Memory Problems System will - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 225
Table D-13 Solving Memory Problems (continued) Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Memory is installed incorrectly or is bad. 1. - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 226
, common causes and solutions are listed in the following table. Table D-14 Solving Processor Problems Poor performance is experienced. Cause Solution Processor is hot. 1. Make sure the airflow to the computer is not blocked. 2. Make sure the fans are connected and working properly (some fans - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 227
is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed drive, run the Computer Setup utility and try adding a POST delay under Advanced > Power-On Options. The device is attached to a SATA port that has been disabled Run the Computer Setup - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 228
and DVD Problems (continued to determine the type of media played, such as audio or video. Wait at least 30 seconds to let Device Manager to remove or uninstall the device. 2. Restart the computer and let Windows detect the CD or DVD driver. Recording or copying Troubleshooting Without Diagnostics - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 229
table. Table D-16 Solving Drive Key Problems USB Drive Key is not seen as a drive letter in Windows. Cause Solution The drive letter after the Setup: Creating a Bootable Device: Supported USB Flash Media Device" section of the Service Reference Guide. The computer boots to DOS after making - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 230
table. Table D-17 Solving Front Panel Component Problems A USB device, headphone, or microphone is not recognized by the computer. Cause Solution Device is not properly connected. 1. Turn off the computer. The device does not have power. The correct device driver is not installed. The cable - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 231
corrupted. (A "cookie" is a 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 information that the Web server can later retrieve.) Windows Vista 1. Select Start > Control Panel. 2. Click Network and - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 232
Table D-18 Solving Internet Access Problems (continued) Internet takes too long to download Web sites. Cause Solution Modem is not set up properly. Verify that the modem is connected and communicating properly. Windows XP 1. Select Start > Control Panel. 2. Double-click System. 3. Click the - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 233
solutions listed in the following table. Table D-19 Solving Software Problems Computer will not continue and no HP logo screen has appeared. Cause Solution POST error has occurred. Observe the beeps and LED lights on the front of the computer. See Appendix A, POST Error Messages on page 174 to - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 234
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 for technical assistance. 222 Appendix D Troubleshooting Without - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 235
Battery socket/Battery LED - 5V_Aux (on) Health-LED UID LED Power LED Hard drive activity LED Boot block header/jumper Boot block recovery header ROM recovery header CPLD programming header Clear Password header/jumper Clear CMOS header RJ45 jack Stacked RJ45/Dual USB Quad stacked USB First - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 236
and Video Port Parallel port over dual VGA ports DVI connector Keyboard connector, PS/2 (Closest to power supply) Mouse connector, PS/2 Stacked mouse (Top)/keyboard (Bottom) connector Video connector, VGA Primary single USB connector Secondary single USB port Microphone jack Line-in jack Line-out - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 237
Header for front panel audio P24 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 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 238
Serial ATA (SATA) connector VSFF expansion connector Graphics option connector Fifth Serial ATA (SATA) connector ATA (SATA) connector Primary (CPU) fan header for fansink Secondary CPU fan header for fansink Primary fan header Security hood switch on riser card Clear CMOS switch/push button Single - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 239
USB front port power switch First USB rear port power switch Second USB rear port power switch Third USB rear port power switch Battery retainer Memory slot. DIMM1 or RIMM1 populated and tested Following memory slots Primary processor socket Secondary processor socket System ROM and Socket (Socket - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 240
Y4 Y5/H5 Secondary NIC clock crystal RTC clock crystal/tie-down 228 Appendix E System Board and Riser Board Reference Designators - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 241
This chapter provides specifications for the microtower and small form factor chassis. Microtower Chassis Desktop Dimensions Height 19.94 in 50.65 cm Width 6.98 in 17.73 cm Depth 16.88 in 42.87 cm Approximate Weight 23.5 lb 10.66 kg Temperature Range Operating 50° to 95 - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 242
(maximum)1 Standard PS 8A @ 100 VAC 4A @ 200 VAC 80 Plus PS 4A @ 100VAC 2A @ 200VAC 1 This system utilizes a passive power factor corrected power supply. The power factor correction is present in the 230V operating mode only. This allows the system to pass the CE mark requirements for use in - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 243
Small Form Factor Chassis Desktop Dimensions Height 3.95 in 10.0 cm Width 13.3 in 33.8 cm Depth 14.9 in 37.8 cm Approximate Weight 19 lb 8.6 kg Weight Supported (maximum distributed load in desktop position) 77 lb 35 kg Temperature Range Operating 50° to 95°F 10° to 35°C - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 244
vPro-branded PCs with 29 Altiris AClient 23 Deployment Solution Agent 23 asset tracking 39 ATA/ATAPI (IDE) drive cable pin assignments 167 audible codes 179 audio problems 202 B battery disposal 59 SFF removal and replacement 160 beep codes 179 bezel blanks SFF removal and replacement 116 BIOS Boot - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 245
drive 82, 139 hard drive 86, 141 media card reader 82, 139 memory 119 optical drive 82, 134 removable hard drive 88, 145 Intel vPro-branded PCs with Active Management Technology 29 internal temperature of computer 48 Internet access problems 219 Internet addresses. See Web sites K keyboard cleaning - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 246
Card Reader problems 196 memory installing 119 MT removal and replacement 69 populating sockets 120 specifications 119 memory problems 212 microphone pin assignments 164 monitor pin assignments 166 monitor problems 198 mouse pin assignments 163 mouse cleaning 57 mouse problems 205 MT access panel - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 247
USB panel 95 MT heatsink 97 MT memory 69 MT power supply 102 MT power switch/LED assembly 96 MT processor 98 MT ReadyBoost card 92 MT rear chassis fan 100 MT serial port 101 MT speaker 99 MT system board 104 SFF battery 160 SFF bezel blanks 116 SFF cable routing 149 SFF computer access panel 114 SFF - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 248
24 spare part number tamper-resistent wrench 58 Torx T-15 screwdriver 58 speaker MT removal and replacement 99 SFF removal and replacement 157 specifications computer 229 memory 119 MT memory 69 static electricity 53 Subscriber's Choice 31 surge-tolerant power supply 48 system board MT removal and - Compaq dc5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 249
Subscriber's Choice 31 System Software Manager download 26 white papers 29 Index 237
Service Reference Guide
HP Compaq dc5850 Business PC