HP dc72 HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit
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- HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 1
service reference guide HP Compaq dc7700 Business PC 1st Edition This document provides information on the removal and replacement of all parts as well as information on troubleshooting, Desktop Management, setup utilities, PATA and SATA drives, safety, routine care, connector pin assignments, POST - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 2
- HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 3
Service Reference Guide HP Compaq dc7700 Business PC dc7700 1st Edition Document Part Number: 433612-001 September 2006 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 4
of life. Ä CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information. Service Reference Guide HP Compaq dc7700 Business PC First Edition (September 2006) Document Part Number: 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 5
Contents 1 Installing the Operating System 1.1 Installing or Upgrading Device Drivers 1-1 1.2 Transferring Files and Settings 1-2 1.3 Creating a Disc Recovery Set 1-2 2 Setup Utilities and Diagnostics Features 2.1 Power-On Self-Test (POST 2-1 2.2 Computer Setup Utilities 2-2 2.2.1 Using - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 6
11 3.4.5 Dual-State Power Button 3-15 3.4.6 HP Web Site Support 3-16 3.4.7 Industry System 3-26 3.6.2 Surge-Tolerant Power Supply 3-26 3.6.3 Thermal Sensor CMT 5-1 5.1.2 Small Form Factor (SFF 5-2 5.1.3 Ultra-Slim Desktop Cleaning the Mouse 5-7 iv 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 7
Contents 5.5 Service Considerations 5-7 5.5.1 Power Supply Fan 5-7 5.5.2 Tools and Software Requirements 5-7 5.5.3 Screws 5-8 5.5.4 Cables and Connectors 5-8 5.5.5 Hard Drives 5-8 5.5.6 Lithium Coin Cell Battery 5-9 6 Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 8
Small Form Factor (SFF) Chassis 7.1 Preparation Cable Connections 7-11 7.8 Memory 7-12 7.9 Vertically Oriented 33 7.16Speaker 7-35 7.17Power Supply 7-36 7.18Chassis Fan 7-38 Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.1 vi 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 9
.2Type 2 Battery Holder 8-28 8.20.3Type 3 Battery Holder 8-29 A Connector Pin Assignments B Power Cord Set Requirements C POST Error Messages D Troubleshooting Without Diagnostics E System Board and Riser Board Reference Designators F Memory Index Service Reference Guide, dc7700 433612-001 vii - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 10
Contents viii 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 11
read and follow the instructions that appear on the support software CD subscription: http://h18000.www1.hp.com/support/files/desktops/us/purchase.html. ✎ If the computer has a writable optical drive, install the appropriate application to be able to write to the drive. Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 12
> HP Backup and Recovery Manager Manual. If Create factory software recovery CDs or DVDs to recover the system is unavailable on the system, the HP Restore Plus CD set can be obtained through product support on http://welcome/country/us/en/contact_us.html. 1-2 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 13
Customer Support. These on all HP products. 2.1 Power-On Self-Test deleting, or bypassing the password. If POST finds an error in the system, an audible and/or visual message occurs. For POST error messages and their solutions refer to Appendix C, "POST Error Messages." Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 14
change the display status of Power-On Self-Test (POST) messages. Post Messages Disabled suppresses most POST messages, such as memory count, product name, and when supported by drive). ■ Enable or disable DriveLock security (when supported by drive). 2-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 15
A choice of five headings appears in the Computer Setup Utilities menu: File, Storage, Security, Power, and Advanced. 5. Use the arrow (left and right) keys to original factory system defaults. Ä CAUTION: Do NOT turn the computer power OFF while the BIOS is saving the F10 Computer Setup changes - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 16
without applying or saving any changes. Save Changes and Saves changes to system configuration or default settings and exits Exit Computer Setup. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 17
emulation options available CD-ROM drive No emulation options available ATAPI LS-120 None (treated as Other). Diskette (treated as diskette drive). ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc7700 433612-001 2-5 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 18
and write requests with DMA data transfers. When "Disable" is selected, the BIOS will service ATA device read and write requests with PIO data transfers. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-6 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 19
with either of these operating systems in AHCI mode without the required device driver, the system will crash (blue screen). SATA 0 and 2 Allows you system. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 20
you to enable/disable the Smart Card to be used in place of the Power-On Password. This option only appears if a Smart Card reader is attached password) ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 21
a subsequent cold-boot sequence. ✎ This selection will only appear when at least one drive that supports the DriveLock feature is attached to the system. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc7700 433612-001 2-9 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 22
the computer off and then back on. Power OS Power Management • Runtime Power Management - Enable/Disable. Allows certain operating controlled. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 23
ready to boot by the time POST is finished. The POST delay also gives you more time to press F10 to enter Computer (F10) Setup. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc7700 433612-001 2-11 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 24
booting to WinNT. Execute Memory Restarts the computer and executes the POST memory test. Test (some models) BIOS Power-On Allows you to and Exit. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-12 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 25
• Printer mode (Bi-Directional, EPP & ECP, Output Only). • Num Lock state at power-on (off/on). • S5 Wake on LAN (enable/disable). • To disable Wake on information. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 26
hard drive. The NIC option ROM takes up memory space below 1MB commonly referred to as DOS Compatibility option ROM enabled. ✎ Support for specific Computer Setup file and stored on a diskette or USB HP Drive Key. Use HP HP Insight Diagnostics. 2-14 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 27
page, click Agree if you agree with the terms. The HP Insight Diagnostics utility launches with the Survey tab displayed. 2.3.2 Survey Memory-Shows information about all memory in the computer. This includes memory slots on the system board and any memory modules installed. Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 28
Utilities and Diagnostics Features Miscellaneous-Shows information obtained from the computer configuration memory (CMOS), system management BIOS data, system board data, and diagnostics to display more detailed information and recommended actions. 2-16 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 29
Help tab contains an HP Insight Diagnostics tab, an Error Codes tab, and a Test Components tab. The HP Insight Diagnostics tab contains help error Message and a Recommended Repair action that should help solve the problem. To find an error code description quickly, enter the code in the - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 30
Select the specific product. 5. Select the OS. 6. Click the Diagnostics link. 7. Select HP Insight Diagnostics Offline Edition. 8. Select the proper language and click Download. ✎ The download includes instructions on how to create the bootable CD. 2-18 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 31
the best deployment method. The Restore Plus! CD, ROM-based setup, and ACPI hardware provide further assistance with recovery of system software, configuration management and troubleshooting, and power management. Service Reference Guide, dc7700 433612-001 3-1 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 32
files to the hard drive, to network drives, or to removable media, such as CDs, DVDs, or flash media. If data or system files are lost, deleted, or corrupted, Backup and Recovery Manager allows you to retrieve data or restore the last good system image. 3-2 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 33
with system management software, it can: ■ Request in-depth client inventory information - Capture detailed information about the processors, hard drives, memory, BIOS, drivers, and sensor information (such as fan speed, voltage, and temperature) Service Reference Guide, dc7700 433612-001 3-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 34
resolve hardware problems Tight integration with HP Instant Support tools reduces hardware troubleshooting time. ■ Diagnostics-remotely run & view reports on HP desktop, notebook, and workstation models ■ System Health Scan-check for known hardware issues in your installed base of HP client systems - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 35
management functionality. It combines: ■ HP Client Manager ■ HP Systems Insight Manager Connector ■ Altiris Migration Suite ■ Altiris Local Recovery Pro For more information about the HP Client Foundation Suite, visit http://www.hp.com/go/easydeploy. Service Reference Guide, dc7700 433612-001 3-5 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 36
alert monitoring ❏ HP hardware driver and BIOS updates ❏ Integration with HP ProtectTools ❏ Free add-on support for Intel Active Management Technology (AMT) ❏ Free version for basic hardware management of HP desktops and notebooks, and software and hardware management for HP Thin Clients. For more - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 37
■ Power management-power on/off, cycle power 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 Service Reference Guide, dc7700 433612-001 3-7 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 38
Desktop Power Control-configure management engine power supports AMT. Enterprise management consoles are available from suppliers such as HP OpenView, Altiris and Microsoft SMS. In SMB mode, the client Bulletins, and Driver alerts for hp.com/subhub.php. 3-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 39
Desktop Management 3.3.11 Subscriber'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 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 40
, FAT16, or FAT32 file system. 3. Turn on the computer. If the system 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. 3-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 41
to enter Computer Setup. Press Enter to bypass the title screen, if necessary. 10. Select File > Replicated Setup > Restore from Removable Media, and follow the instructions on the screen. 11. Restart the computer when the configuration is complete. Service Reference Guide, dc7700 433612-001 3-11 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 42
See "Supported USB File > Replicated Setup > Save to Removable Media. Follow the instructions hp.com, click Software and Driver Downloads, and enter the model number of the computer. 9. On the configuration diskette or USB flash media device, create an autoexec.bat file Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 43
After the system files have been transferred, SYS will return to the A:\ prompt. Go to step 13. 9. Copy any files you want to keep from your USB flash media device to a temporary directory on another drive (for example, the system's internal hard drive). Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 44
Desktop . If you do not want this screen, add a zero-length file named LOGO.SYS to the root directory of the USB flash media drives attached, turn off the computer and unplug the power cord. Ä CAUTION: The power cord MUST be unplugged. 2. Open the computer and remove Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 45
change the power button's configuration, complete the following steps: 1. Left click on the Start Button, then select Control Panel > Power Options. 2. In the Power Options Properties, select the Advanced tab. 3. In the Power Button section, select Stand by. Service Reference Guide, dc7700 433612 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 46
made the task of locating, 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 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 47
Setup Utilities. See the Computer Setup (F10) Utility Guide on the Documentation and Diagnostics CD included with the computer for additional information and instructions on using the Computer Setup Utilities. Some computers also have HP BIOS Configuration for ProtectTools, which is a Windows-based - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 48
least one drive that supports ATA Security is attached to the system. ✎ For more information about Computer Setup, see the Computer Setup (F10) Utility Guide. Support for security features may vary depending on your specific computer configuration. 3-18 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 49
Desktop Management Mechanical Security Features Feature Purpose Memory Change Alerts Detects when memory know the power-on password, HP ProtectTools Security Manager Guide at www.hp instructions on the screen. 4. Before exiting, Select File > Save Changes and Exit. Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 50
Power-On Password and follow the instructions on the screen. 4. Before exiting, select File > Save Changes and Exit. Entering a Power-On Password To enter a power with an embedded security device, refer to the HP ProtectTools Security Manager Guide at www.hp.com. If a setup password has been - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 51
password may also be changed using the Security options in Computer Setup. Deleting a Power-On or Setup Password If the system is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at www.hp.com. 1. Turn on or restart the computer. If you are in Windows - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 52
the computer. Refer to the Troubleshooting Guide on the Documentation and Diagnostics CD for instructions on clearing passwords. If the system only available when hard drives that support the ATA Security command set are detected. DriveLock is intended for HP customers for whom data security is - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 53
Desktop Management Using DriveLock When one or more hard drives that support halt and the user will be instructed to cycle power. DriveLock Applications The most practical , and support. For users with less stringent security requirements, HP does not Service Reference Guide, dc7700 433612-001 3-23 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 54
Desktop and select the desired security level. 4. Before exiting, select File > Save Changes and Exit. Smart Cover Lock The Smart Cover Lock is a software-controllable cover lock featured on some HP computers. This lock prevents unauthorized access to the internal Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 55
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 Ä CAUTION: The Smart Cover FailSafe Key is a specialized tool available from HP. Be prepared; order this key before you need one - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 56
hard drive. Your 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. 3.6.2 Surge-Tolerant Power Supply An integrated surge-tolerant power supply provides greater reliability - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 57
supports a PATA optical drive. No PATA drives are supported on any other model. 4.1 SATA Hard Drives Serial ATA Hard Drive Characteristics Number of pins/conductors in data cable Number of pins in power rules, a POST error message may be displayed. Service Reference Guide, dc7700 433612-001 4-1 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 58
V power P3 V3.3 3.3 V power P4 Ground P5 Ground P6 Ground P7 V5 5 V power P8 V5 5 V power Pin Usage Notes P9 V5 5 V power P10 Ground P11 Ground P12 Ground P13 V 12 12 V power P14 V12 12 V power P15 V12 12 V power 4-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 59
supports a PATA optical drive. No PATA drives are supported on any other model. 4.4 ATA SMART Drives The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP The combination of the file system and the operating /Partition Capacity Limits File System FAT 32 NTFS - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 60
Serial and Parallel ATA Drive Guidelines and Features 4-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 61
an AC power source, voltage is always applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage. 5.1 Chassis Designations 5.1.1 Convertible Minitower (CMT) Service Reference Guide, dc7700 433612 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 62
Identifying the Chassis, Routine Care, and Disassembly Preparation 5.1.2 Small Form Factor (SFF) 5.1.3 Ultra-Slim Desktop (USDT) 5-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 63
provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions. 5.2.1 Generating Static electrostatic-sensitive parts from assemblies in protective packaging or conductive foam. Service Reference Guide, dc7700 433612-001 5-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 64
workstation. ■ Heel straps/Toe straps/Boot straps can be used at standing workstations and work areas. ■ Turn off power and input signals before inserting and . ■ Use field service tools, such as cutters aids ■ Conductive foam ■ Conductive tabletop workstations with ground cord of one-megohm - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 65
keyboard, with the keyboard feet down, directly against the front of the desktop unit as this also restricts airflow. ■ Occasionally clean the air vents or enable power management functions of the operating system or other software, including sleep states. Service Reference Guide, dc7700 433612 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 66
keys. ■ If you remove a key, use a specially designed key puller to prevent damage to the keys. This tool is available through many electronic supply outlets. Ä CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are improperly removed or installed, the - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 67
Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver) ■ Phillips #2 screwdriver ■ Diagnostics software ■ HP tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or HP tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002) Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 68
If an incorrect screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the part that was removed, that have magnetic fields such as monitors or speakers. 5-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 69
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 Reference Guide, dc7700 433612-001 5-9 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 70
Identifying the Chassis, Routine Care, and Disassembly Preparation 5-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 71
(CMT) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the diagnostics utility to verify that all components operate properly. ✎ Not all features listed in this guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 72
CMT) Chassis 6.2 Unlocking the Smart Cover Lock If you have locked the Smart Cover Lock use Computer Setup to unlock the lock. Refer to the Desktop Management Guide following circumstances: ■ Power outage ■ Startup failure ■ Processor or power supply failure ■ Lost Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 73
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.3 Hood Sensor 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel ( the slot 2. To install the hood sensor, reverse the removal procedure. Service Reference Guide, dc7700 433612-001 6-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 74
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.4 External Security Devices 6.4.1 Cable Lock The cable lock may be used to secure the padlock may also be used with a security cable to secure the computer to a fixed object. 6-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 75
off and that the power cord is disconnected from the electrical outlet. 2. Lift up on the access panel handle 1, slide the access panel back about 2.5 cm (1 inch), then lift it off the unit 2. To install the computer cover, reverse the removal procedure. Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 76
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.6 Front Bezel 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel ( it 2. To reinstall the front bezel, reverse the removal procedure 6-6 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 77
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.7 Front Drive Bezels 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel (Section located at the bottom of the subpanel when properly oriented. Service Reference Guide, dc7700 433612-001 6-7 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 78
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.7.2 Diskette Drive Bezel or Bezel Blank Press up on the two small retaining clips 1 on of the front bezel 3. To install a bezel or a bezel blank, reverse the removal procedure. 6-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 79
CMT) Chassis 6.8 Cable Management Always follow good cable management practices when working inside the computer. ■ Keep cables away from major heat sources like the heatsink. ■ Do not jam cables on top of expansion cards or memory power supply. Service Reference Guide, dc7700 433612-001 6-9 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 80
power 1st ODD or 2nd HDD if no ODD present, SATA1 1st Hard drive, SATA0 PATA/Zip/Media card reader Diskette drive SATA hard/optical drive - Bay 1 only 2nd or 4th HDD if no Odd presenT, SATA2 2nd ODD or 3rd HDD if no ODD present, SATA3 6-10 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 81
on the memory socket. 4. Push the module down into the socket, ensuring that the module is fully inserted and properly seated. Make sure the latches are in the closed position (3). 5. Repeat steps 3 and 4 for any additional modules that you want to install. Service Reference Guide, dc7700 433612 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 82
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis ✎ The computer automatically recognizes the additional memory when the computer is turned on. To reassemble the computer, reverse rotate the expansion card retention latch up. 6-12 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 83
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 5. If you are installing an expansion card in a vacant socket, remove the an installed expansion card, disconnect any cables that may be attached to the expansion card. Service Reference Guide, dc7700 433612-001 6-13 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 84
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 7. If you are removing a PCI Express card from a x16 PCI Express socket with a retention card or expansion slot cover for proper cooling of internal components during operation. 6-14 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 85
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 10. Slide the bracket on the if necessary. Refer to the Computer Setup (F10) Utility Guide on the Documentation and Diagnostics CD for instructions about using Computer Setup. Service Reference Guide, dc7700 433612-001 6-15 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 86
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.11 PCI Retainer Latch 1. Prepare the inside the chassis and rotate the expansion card retention latch up. 5. Use a thin flat blade screwdriver to pry up on the broken plastic latches 1, then complete the removal by pulling - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 87
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6. Slide the pivoting bar to the right 1, then lift the left end 2 to remove it in place on the rotating bar. ✎ The green latches are marked "R" and "L" for your convenience. Service Reference Guide, dc7700 433612-001 6-17 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 88
Replacement Procedures - Convertible Minitower (CMT) Chassis 6.12 Expansion Card Guide 1. Prepare the computer for disassembly guide to the chassis and remove the guide from the chassis 2. To install the expansion card guide, reverse the removal procedure. 6-18 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 89
The computer supports up to six drives that may be installed in various configurations. This Section describes the procedure for replacing or upgrading the storage drives. A Torx T-15 screwdriver is needed to remove and install the guide screws on a drive. Ä CAUTION: Make sure personal files on the - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 90
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.13.2 Hard Drive Ä CAUTION: To prevent loss the computer access panel (Section 6.5). 3. Remove the front bezel (Section 6.6). 4. Disconnect the power 1 and data 2 cables from the back of the drive. ✎ The right-angle data cable - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 91
. The HP-supplied standard screws used on hard drives are silver. 7. Store the removed drive in anti-static packaging. 8. Install the new drive by sliding it into the appropriate drive bay on the front of the chassis. The drivelock automatically secures the drive in the bay. Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 92
CMT 4. Disconnect the power and data cables desktop mode, continue with step 7. If the computer is in the minitower mode, continue with step 8. 6. In the desktop mode, press down on the yellow drivelock mechanism 1 and slide the drive from the drive bay 2. 6-22 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 93
the optical drive. ✎ Extra guide screws are provided on the chassis on the side of the fourth drive bay. Optical drives use M3 metric screws. The HP-supplied metric screws are black. The HP-supplied standard screws, used only for hard drives, are silver. Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 94
Procedures - Convertible Minitower (CMT) Chassis 9. After installing the M3 metric guide screws 1, install the drive cable is required for Windows XP applications. 11. Connect the data and power cables on the to the drive. ✎ Refer to Chapter 4, "Serial 24 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 95
, two on each side of the drive. ✎ Extra guide screws are provided on the side of the drive bay under the access panel. The diskette drive uses M3 metric screws. The HP-supplied metric screws are black. The HP-supplied standard screws, used only for hard drives, are silver. 6. Insert the diskette - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 96
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.14 Front I/O Device 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel (Section by reinstalling the other parts that had been removed. 6-26 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 97
CMT) Chassis 6.15 Power Switch Assembly 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel (Section 6.5). 3. Remove the front bezel (Section 6.6). 4. Disconnect the power power switch assembly, reverse the removal procedure. ✎ When installing the power switch - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 98
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.16 System Board 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel (Section latching 1, then push the board into its locked position 2. 6-28 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 99
CMT) Chassis 6.17 Battery The 3-volt lithium coin cell battery that comes with this computer provides power or water. ■ Replace the battery only with the HP spare designated for this product. Ä CAUTION: Before instructions to replace the battery: Service Reference Guide, dc7700 433612-001 6-29 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 100
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.17.1 Type 1 Battery Holder 1. Lift the battery out 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 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 101
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.17.2 Type 2 Battery Holder 1. To of the battery. 3. Replace the 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, - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 102
place. 3. Replace the 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. 6-32 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 103
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.18 Heatsink 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel ( fragile and any damage to them may require replacing the system board. Service Reference Guide, dc7700 433612-001 6-33 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 104
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.19 Processor 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel ( bottom of the heatsink and place it in position atop the processor. 6-34 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 105
Procedures - Convertible Minitower (CMT) Chassis 6. Secure the system BIOS can be found on the Web at: http:\\h18000.www1.hp.com/support/files. 6.20 Speaker 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the removal procedures. Service Reference Guide, dc7700 433612-001 6-35 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 106
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.21 Chassis Fan 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel (Section side of the fan housing for proper air flow orientation. 6-36 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 107
(Section 6.5). 2. Disconnect all power cables from the mass storage devices and from the system board. 3. Remove the four screws that connect the power supply to the chassis 1 and slide the chassis forward 2 until it is stopped by the retaining clips. Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 108
(CMT) Chassis 4. With the power supply stopped by the retaining clips 1, lift the power supply to raise it over the clips then slide the power supply forward 2 to remove it from the computer. To install the power supply, reverse the removal procedure. 6-38 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 109
and Replacement Procedures - Convertible Minitower (CMT) Chassis 6.23 Changing from Desktop to Minitower 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel (Section 6.5). 3. Remove the front bezel (Section 6.6). 4. Disconnect all power and data cables from the - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 110
Minitower (CMT) Chassis bay has a shorter depth than the upper two bays. The bottom bay supports a drive that is no more than 17 cm (6.7 inches) in drive bay may result in damage to the drive. 8. Reconnect all power and data cables to the drives in the 5.25-inch drive Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 111
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 11. Reposition the subpanel (rotate it 90°) with the logo at the bottom, then snap Smart Cover Lock, use Computer Setup to relock the lock and enable the Smart Cover Sensor. Service Reference Guide, dc7700 433612-001 6-41 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 112
CMT) Chassis 6.24 Changing from Minitower to Desktop 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer access panel (Section 6.5). 3. Remove the front bezel (Section 6.6). 4. Disconnect all power for each 5.25-inch drive. 6-42 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 113
(CMT) a shorter depth than the upper two bays. The bottom bay supports a drive that is no more than 17 cm (6.7 inches) may result in damage to the drive. 8. Reconnect all power and data cables to the drives in the 5.25-inch desktop configuration. Service Reference Guide, dc7700 433612-001 6-43 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 114
Removal and Replacement Procedures - Convertible Minitower (CMT) Chassis 11. Reposition the subpanel (rotate it 90°) with the logo at the bottom, then snap it back Cover Lock, use Computer Setup to relock the lock and enable the Smart Cover Sensor. 6-44 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 115
(SFF) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. ✎ Not all features listed in this guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 116
SFF) Chassis 7.2 Unlocking the Smart Cover Lock If you have locked the Smart Cover Lock use Computer Setup to unlock the lock. Refer to the Desktop Management Guide following circumstances: ■ Power outage ■ Startup failure ■ Processor or power supply failure ■ Lost Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 117
on the inside of the rear panel with the metal arm 1 wrapped around the air vent grid on the back of the chassis. 2. Use the supplied tamper-resistant screw 2 to secure the Smart Cover Lock to the chassis. Service Reference Guide, dc7700 433612-001 7-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 118
5. Disconnect the hood sensor cable from the system board. 6. Slide the hood sensor switch mounted on the power supply towards the outside of the computer 1 and lower it through the slot 2. To install the hood sensor, reverse the removal procedure. 7-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 119
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.4 External Security Devices 7.4.1 Security Clip A special clip is required to secure the computer the computer to a fixed object. Insert the cable lock in the location shown below. Service Reference Guide, dc7700 433612-001 7-5 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 120
Replacement Procedures- Small Form Factor (SFF) Chassis 7.4.3 Padlock A padlock may be used by itself to secure the computer cover to the computer chassis. A padlock may also be used with a security cable to secure the computer to a fixed object. I 7-6 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 121
SFF) Chassis 7.5 Computer Cover 1. Prepare the computer for disassembly (Section 7.1). Ä CAUTION: Before removing the computer cover, ensure that the computer is turned off and that the power install the computer cover, reverse the removal procedure. Service Reference Guide, dc7700 433612-001 7-7 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 122
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.6 Front Drive Bezels 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer cover . 4. Install a bezel or a bezel blank by pushing the bezel into place. 7-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 123
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis There are three drive bezel inserts that are available. Item 1 2 3 Description Diskette drive bezel Hard drive bezel 3.5" drive bezel Service Reference Guide, dc7700 433612-001 7-9 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 124
Small Form Factor (SFF) Chassis 7.7 Cable memory modules. Printed circuit cards like these are not designed to take excessive pressure on them. ■ Keep cables clear of movable or rotating parts like the power supply in a failed power supply. 7-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 125
Factor (SFF) Chassis 7.7.1 Cable Connections System board connectors are color-coded to make it easier to find the proper connection. Cable To Cable Designator Power Supply System board, 24-pin P1 Power Supply Diskette drive P2 Power Supply CPU power, 6-pin P3 Power Supply 1st SATA - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 126
SFF) Chassis 7.8 Memory Ä CAUTION: The memory module sockets have gold metal contacts. When upgrading the memory, it is important to use memory for more information. Ä CAUTION: When handling a memory module, be careful not to touch any of module with the tab on the memory socket. 5. Push the module - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 127
- Small Form Factor (SFF) Chassis ✎ The computer automatically recognizes the additional memory when the computer is turn off any external devices. 3. Disconnect the power cord from the power outlet and disconnect any external devices. 4. Remove . Service Reference Guide, dc7700 433612-001 7-13 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 128
and rotating the latch to the full open position 1. 7. Remove the slot cover by sliding it up and out of the computer 2. 7-14 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 129
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 8. Install the expansion card by sliding the card under the slot cover retention either an expansion card or slot cover for proper cooling of internal components during operation. Service Reference Guide, dc7700 433612-001 7-15 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 130
and Replacement Procedures- Small Form Factor (SFF) Chassis 7.9.3 PCI Express Expansion Card system, then turn off any external devices. 3. Disconnect the power cord from the power outlet and disconnect any external devices. 4. Remove the computer cover 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 131
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.10 PCI Riser Card Assembly and Backwall 1. (Section 7.4.1), rotate the power supply to its full upright position 1, then lift the power supply straight up and out of the chassis 2. Service Reference Guide, dc7700 433612-001 7- - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 132
SFF) Chassis 7. Remove the SmartCover lock from the backwall of the chassis using the special security wrench and disconnect its cable from the system board. (Section 7.2) 8. Disconnect the data and power ). 11. Remove the chassis fan (Section 7.18) 7-18 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 133
Factor (SFF) Chassis 12. Remove the long mounting screw that secures the system board tray to the chassis. 13. Slide the system board tray assembly towards the front of the chassis about 6 cm (1/4 inch) and lift the system board up and out of the chassis. Service Reference Guide, dc7700 433612 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 134
chassis 1, then slide the backwall assembly a few millimeters/inches toward the space vacated by the power supply and lift out(2. 15. Slide the new backwall onto the rear chassis 1. Secure it with the three screws removed from the old backwall 2. 7-20 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 135
Small Form Factor (SFF) Chassis 16. Install proper cable handling and placement precautions. 20. Install the power supply. Rotate it to its normal operating position. Be sure cage assembly on the new backwall by aligning the cage with the guide rails on the backwall. Press down firmly on the cage to - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 136
Factor (SFF) Chassis is needed to remove and install the guide screws on a drive. Ä CAUTION: Make sure personal files on the hard drive are backed up the Restore Plus! CD to load the HP factory-installed files. 7.11.1 Drive Positions Drive Positions Item Description Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 137
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.11.2 Optical Drive Ä CAUTION: All removable media upright position by pulling on the green-tabbed lip. 5. Disconnect the power and data cables from the rear of the optical drive. Service Reference Guide, dc7700 433612-001 7-23 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 138
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 6. Rotate the drive cage down to its normal position before trying to the place of drive rails. Ä CAUTION: Use only 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive. 7-24 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 139
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.11.3 External 3.5-inch Drive 1. If you to its upright position by pulling on the green-tabbed lip. 6. Disconnect the signal 1 and power 2 cables from the drive. The other end of the cables should remain connected to the system - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 140
SFF) Chassis 8. Press the green drive retention latch 1 located on the side of the diskette drive to disengage the drive from the drive cage and slide the diskette drive forward approximately 6mm (1/4 inch) 2. 9. Lift the rear of the drive up so that the rear guide Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 141
SFF) Chassis 7.11.4 Primary Hard Drive A Torx T-15 screwdriver is needed to remove and install the guide screws on a hard drive. Ä CAUTION: Make sure personal files Restore Plus! CD to load the HP factory-installed files. Ä CAUTION: To prevent loss of Service Reference Guide, dc7700 433612-001 7-27 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 142
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 5. Remove the security clip that secures the backwall to the power supply. 6. Rotate the power supply to its full upright position. 7-28 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 143
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7. Disconnect the power and data cables from the back of the hard drive. 8. Pull the tab the dark blue connector labeled SATA0 first to avoid any hard drive performance problems. Service Reference Guide, dc7700 433612-001 7-29 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 144
the primary hard drive, insert the Restore Plus! CD to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. Follow the instructions in the guide included with the Restore Plus! CD. When the restore process has completed, reinstall any - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 145
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.13 Front I/O Devices 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer the chassis. To reinstall the front I/O device, reverse the removal procedure. Service Reference Guide, dc7700 433612-001 7-31 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 146
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.14 Heatsink 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer cover (Section 7.5). 3. to install the fan shroud may cause the computer to overheat. 7-32 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 147
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.15 Processor 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer cover (Section existing heatsink, go to step 3. If using a new heatsink, go to step 6. Service Reference Guide, dc7700 433612-001 7-33 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 148
latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http:\\h18000.www1.hp.com/support/files. 7-34 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 149
SFF) Chassis 7.16 Speaker 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer cover (Section 7.5). 3. Remove the fan shroud (Section 7.12). 4. Remove any memory 2. To install the speaker, reverse the removal procedures. Service Reference Guide, dc7700 433612-001 7-35 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 150
board. 6. Release the power supply cable from the cable retaining clips on the bottom of the chassis under the drive cage. 7. Disconnect the hood sensor from the system board and remove the sensor from the power supply if required (Section 7.3). 7-36 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 151
chassis 2. To install the power supply, reverse the removal procedure. Ä CAUTION: When installing the power supply cables, make sure they are properly positioned so they are not cut by the drive cage and are not pinched by the rotating power supply. Service Reference Guide, dc7700 433612-001 7-37 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 152
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.18 Chassis Fan 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer cover (Section 7.5). 3. on the chassis fan should face the inside of the chassis. 7-38 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 153
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.19 System Board 1. Prepare the computer for disassembly 7.4.1) and rotate the power supply to its full upright position. 8. Disconnect all data and power cables from the system board. Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 154
Procedures- Small Form Factor (SFF) Chassis 9. Disconnect the serial port from the system board. 10. Disconnect the balance of the cables from the system board. 11. Remove the long mounting screw that secures the system board tray to the chassis. 7-40 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 155
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 12. Slide the system board tray assembly towards the front of the chassis, about 6 they be positioned so they do not interfere with the rotation of the drive cage or power supply. Service Reference Guide, dc7700 433612-001 7-41 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 156
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.20 Drive Clutch Components 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the computer cover ( be careful not to damage the wires that are threaded through it. 7-42 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 157
two screws that secure the clutch finger assembly to the drive cage. ✎ The clutch finger assembly doe not have to be removed to remove the power switch. To replace the drive clutch components, reverse the removal procedure. Service Reference Guide, dc7700 433612-001 7-43 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 158
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.21 Power Switch Assembly 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the of the chassis. To install the power switch and LEDs, reverse the removal procedure. 7-44 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 159
(SFF) Chassis 7.22 Battery The battery that comes with this computer provides power to fire or water. ■ Replace the battery only with the HP spare designated for this product. Ä CAUTION: Before replacing the instructions to replace the battery: Service Reference Guide, dc7700 433612-001 7-45 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 160
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.22.1 Type 1 Battery Holder 1. Lift the battery out 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 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 161
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.22.2 Type 2 Battery Holder 1. To of the battery. 3. Replace the 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 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 162
place. 3. Replace the 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. 7-48 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 163
Slim Desktop (USDT) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. "Standby," or "Suspend" modes. The power cord should always be disconnected before servicing a unit. 6. Disconnect the power cord from the electrical outlet and then from - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 164
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8. If the PC is mounted in the accessory mounting stand, loosen the thumbscrew that secures the lift the computer off the stand 2 and lay the computer down on its rubber feet. 8-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 165
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.2 External Security Devices 8.2.1 Installing a Cable Lock The cable lock may be used to A padlock may also be used with a security cable to secure the computer to a fixed object. Service Reference Guide, dc7700 433612-001 8-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 166
Desktop (USDT) Chassis 8.3 Computer Access Panel 1. Prepare the computer for disassembly (Section 8.1). Ä CAUTION: Before removing the computer access panel, ensure that the computer is turned off and that the power , reverse the removal procedure. 8-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 167
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.4 Optical Drive Ä CAUTION: The flat ribbon cable at the back of the optical through the front bezel 2. 4. Disconnect the flat ribbon cable from the back of the optical drive. Service Reference Guide, dc7700 433612-001 8-5 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 168
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis Before the new optical drive can be used, the release latch must be attached. 1. Peel latch securely to the optical drive. To install the optical drive, reverse the removal steps. 8-6 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 169
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.5 Front Panel Assembly 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the the chassis 2. To reinstall the front panel assembly, reverse the removal procedure. Service Reference Guide, dc7700 433612-001 8-7 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 170
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.6 Front Bezel 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the computer access panel 3. To reinstall the front bezel, reverse the removal procedures. 8-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 171
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.7 Chassis Fan 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the computer access panel ( top of the assembly nearest the center of the front panel assembly. Service Reference Guide, dc7700 433612-001 8-9 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 172
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.8 Speaker 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the computer access panel (Section speaker 2. To install the speaker, reverse the removal procedure. 8-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 173
it straight up 2. Ä CAUTION: Always pull the connector - NEVER pull on the cable. Pulling on the cable could damage the cable and result in a failed power supply. Service Reference Guide, dc7700 433612-001 8-11 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 174
, (blue) Speaker P6, SPKR Serial port A P54, COM A Parallel connector P126, PAR Hood sensor P125, HSENSE SATA hard drive P60, SATA0, (dark blue) Power Supply Connections Connector ID P1 P2 P3 Main power Hard drive CPU power Description 8-12 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 175
seated. Make sure the latches are in the closed position 3. ✎ A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket. 4. Repeat step 3 for any additional modules that you want to install. Service Reference Guide, dc7700 433612-001 8-13 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 176
Desktop (USDT) Chassis ✎ The computer automatically recognizes the additional memory when the computer is turned on. To reassemble the computer, reverse the removal procedure. 8.11 Expansion Card Cage The computer supports support guides on the chassis and press it firmly into place. 8-14 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 177
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.12 Expansion Card 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the card or expansion slot cover for proper cooling of internal components during operation. Service Reference Guide, dc7700 433612-001 8-15 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 178
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 7. For a PCI Express expansion necessary. Refer to the Computer Setup (F10) Utility Guide on the Documentation and Diagnostics CD for instructions about using Computer Setup. 8-16 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 179
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.13 Expansion Card Retaining then rotate the latch out of the way 2. 5. Use a thin, flat-blade screwdriver to pry the damaged locking lever off the expansion card cage 3. 6. Service Reference Guide, dc7700 433612-001 8-17 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 180
Desktop (USDT) Chassis 8.14 Hard Drive A Torx T-15 screwdriver is needed to remove and install the guide screws on a hard drive. Ä CAUTION: Make sure personal files load the HP factory-installed files. Ä power and data cables from the hard drive. 8-18 433612-001 Service Reference Guide, - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 181
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 7. Pull the drive release lever away from the hard drive 1, then lift the removal procedure. Ä CAUTION: When installing the hard drive, ensure that cable are not cut or pinched. Service Reference Guide, dc7700 433612-001 8-19 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 182
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.15 Front I/O Device 1. attach it to the front I/O board. 2. Attach the front USB cable and the power switch/LED cable to the front I/O board. 3. Attach the front I/O board to 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 183
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.16 Heatsink Assembly 1. Prepare the computer for disassembly (Section 8.1). 2. Remove the computer access control cable and the thermal sensor cable to the system board. Service Reference Guide, dc7700 433612-001 8-21 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 184
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis Ä CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an reusing the existing heatsink, go to step 3. If using a new heatsink, go to step 5. 8-22 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 185
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 3. If reusing the existing heatsink, clean bottom of the heatsink and apply computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files. Service Reference Guide, dc7700 433612-001 8-23 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 186
the removal procedure. Make sure the power supply engages the clips on the chassis when sliding it into place. ✎ When installing the power supply make sure the cables are routed properly and do not interfere with the access panel installation. 8-24 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 187
Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.19 memory modules (Section 8.10). 7. Remove the expansion card cage (Section 8.11). 8. Remove the hard drive (Section 8.14). 9. Remove the heatsink (Section 8.16). 10. Remove the power supply Service Reference Guide, dc7700 433612-001 8-25 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 188
■ Replace the battery only with the HP spare designated for this product. Ä CAUTION power supply to access the battery (Section 8.18). 6. Depending on the type of battery holder on the system board, complete the following instructions to replace the battery: 8-26 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 189
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.20.1 Type 1 Battery Holder 1. Lift the battery has been replaced, reverse the disassembly procedure. 5. Plug in the computer and turn on power to the computer. 6. Reset the date and time, your passwords, and any special system - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 190
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.20.2 Type 2 Battery Holder 1. battery has been replaced, reverse the disassembly procedure. 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 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 191
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8.20.3 Type 3 Battery Holder 1. Pull battery has been replaced, reverse the disassembly procedure. 4. Plug in the computer and turn on power to the computer. 5. Reset the date and time, your passwords, and any special system - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 192
Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis 8-30 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 193
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 Ethernet BNC Connector and Icon Pin 1 (Center) 2 (Shield) Signal Data Ground Service Reference Guide, dc7700 433612-001 A-1 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 194
Busy 12 Paper End Pin 13 14 15 16 17 18-25 Signal Select Auto Linefeed Error Initialize Printer Select IN Signal Ground A-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 195
Ready Signal Ground Data Set Ready Request to Send Clear to Send Ring Indicator (5V if powered) USB Connector and Icon Pin Signal 1 +5 VDC 2 - Data 3 + Data 1 23 Pin 1 (Tip) 2 (Ring) 3 (Shield) Signal Audio_In_Left Audio_In_Right Ground Service Reference Guide, dc7700 433612-001 A-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 196
9 +5V (fused) 10 Ground Pin Signal 11 Not used 12 DDC Serial Data 13 Horizontal Sync 14 Vertical Sync 15 DDC Serial Clock A-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 197
Signal 40 +5V 41 +5V 42 +5V 43 GND 44 GND 45 GND 46 GND 47 CSEL 48 GND 49 Vendor-specific 50 Vendor-specific Service Reference Guide, dc7700 433612-001 A-5 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 198
20 open 21 +5 V 22 +5 V 23 +5 V 24 GND 24-Pin MicroFit Power (USDT, SFF, and ST models) Connector 24 13 Pin Signal 1 +5 Vaux 2 GND 3 +5 Power (for CPU) (MT and CMT models) Connector and Icon Pin 1 2 3 4 CMT and MT Signal GND GND +12 V CPU -12 V CPU A-6 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 199
Signal S1 Ground S5 B- S2 A+ S6 B+ P1 V 3.3 P5 Ground P9 V 5 P13 V 12 P2 V 3.3 P6 Ground P10 Ground P14 V 12 *S = Data, P = Power Pin Signal S3 AS7 Ground P3 V 3.3 P7 V 5 P11 Reserved P15 V 12 Pin Signal S4 Ground P4 Ground P8 V 5 P12 Ground Service Reference Guide, dc7700 433612-001 A-7 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 200
GND 25 PERp2 46 GND 47 PERp7 48 PERn7 49 GND 50 RSVD 71 GND 72 PERp13 73 PERn13 74 GND 75 GND A-8 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 201
PETp2 24 PETn2 25 GND 46 PETn7 47 GND 48 PRSNT2# 49 GND 50 PETp8 71 PETn13 72 GND 73 GND 74 PETp14 75 PETn14 Service Reference Guide, dc7700 433612-001 A-9 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 202
Clock 7 DDC Data 8 No Connect 9 T.M.D.S. Data110 T.M.D.S. Data1+ 11 T.M.D.S. 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 Plug Detect 17 T.M.D.S. Data018 T.M.D.S. Data0+ 19 T.M.D.S. Data0/5 Shield 20 T.M.D.S. Data5- 21 T.M.D.S. Data5+ 22 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 203
the power cord set is damaged in any manner, replace it immediately. Japanese Power Cord Requirements For use in Japan, use only the power cord received with this product. Ä CAUTION: Do not use the power cord received with this product on any other products. Service Reference Guide, dc7700 433612 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 204
The flexible cord must be Type HO5VV-F, 3-conductor, 0.75mm2 conductor size. Power cord set fittings (appliance coupler and wall plug) must bear the certification mark of the with a Japanese Industrial Standard C8303 (7A, 125V) configuration. B-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 205
if the Power-On Self-Test (POST) encounters a problem. This test memory for an expansion card's option ROM. Internal PXE option ROM is used for booting from the NIC to a PXE server. 3. Ensure that the ACPI/USB Buffers @ Top of Memory setting in Computer Setup is enabled. Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 206
problem memory modules, replace the system board. 1. Verify proper memory module type. 2. Try another memory socket. 3. Replace memory with a module conforming to the SPD standard. Rearrange the DIMMS so that each channel has the same amount of memory. C-2 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 207
Recommended Action 1. If additional memory was recently added, remove it to see if the problem remains. 2. Check product documentation for memory support information. 1. Reconnect keyboard applicable). Reflash the system ROM with the latest BIOS image Service Reference Guide, dc7700 433612-001 C-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 208
in Advanced > Onboard Devices. Replace system board if minimal graphics degrading is an issue. No action required. Reconnect or replace front audio harness. C-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 209
Front USB harness has been detached or unseated from system board. There is an incompatibility/problem with this device and the system or PCI Express Link could not be retrained to an Computer Setup and reset the IRQ in Advanced > Onboard Devices. Service Reference Guide, dc7700 433612-001 C-5 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 210
power cord, re-seat the memory modules, and reboot the computer. 3. If the memory configuration was recently changed, unplug the computer, restore the original memory configuration, and reboot the computer. 4. If the error persists, replace the system board. C-6 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 211
power cord, restore the original memory configuration, and reboot the computer. 4. If the error persists, replace the system board. 1. Reboot the computer. 2. If the error persists, update to the latest BIOS version. 3. If the error still persists, replace the system board. Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 212
will not boot without fan. Parity RAM failure. CPU fan not installed serial number to be entered, download from http://www.hp.com and run SP5572.EXE (SNZERO.EXE). 2. Run utilities. 1. Remove the computer cover, press the power button, and see if the processor fan spins Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 213
every two seconds. Red Power LED flashes two times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Beeps None None 2 Possible Cause Recommended Action Computer on. None Computer in Suspend to RAM mode (some models - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 214
unplug the computer power cord before attempting to reseat, install, or remove a DIMM module. 1. Reseat DIMMs. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. C-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 215
Power LED flashes six times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power of the Desktop Management Guide on the Documentation and Diagnostics CD. 2. Replace the system board. Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 216
stop after fifth iteration but LEDs continue until problem is solved. Beeps 9 10 Possible Cause System powers on but is unable to boot. Bad option card. Recommended Action 1. Check that the voltage selector, located on the rear of the power supply (some models), is set to the appropriate voltage - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 217
on, then replace the power button harness. 5. If the 5 V_aux light on the system board is not turned on, remove the expansion cards one at a time until the 5 V_aux light on the system board turns on. If the problem persists, replace the power supply. Service Reference Guide, dc7700 433612-001 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 218
POST Error Messages C-14 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 219
guidelines for troubleshooting the computer Is the computer turned on? ■ Is the green power light illuminated? ■ Is the monitor turned on? ■ all of the necessary device drivers installed? ■ Have all printer drivers been installed for each application? Service Reference Guide, dc7700 433612-001 D-1 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 220
Troubleshooting Without Diagnostics Solving Minor Problems Solving Minor Problems Problem Cause Computer appears locked up and will not turn off when the power button is pressed. Software control of the power Network driver is power button for at least four seconds until power powered - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 221
Troubleshooting Without Diagnostics Solving Minor Problems (Continued) Problem Cause Cannot remove computer cover or access panel. Smart Cover Lock, featured on some computers, is locked. Poor performance is experienced. Processor is hot. Hard drive is full. Low on memory. Hard drive - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 222
board. 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. D-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 223
Troubleshooting Without Diagnostics Solving Power Supply Problems Solving Power Supply Problems Problem Cause Power supply shuts down intermittently. Voltage selector switch on rear of computer chassis (some models) is not switched to correct line voltage (115V or 230V). Power supply will not - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 224
Troubleshooting Without Diagnostics Solving Power Supply Problems (Continued) Problem Cause Solution Power LED flashes Red, four times, once every all devices are functioning properly. 4. Replace the power supply. 5. Replace the system board. D-6 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 225
Troubleshooting Without Diagnostics Solving Diskette Problems Solving Diskette Problems Problem power cable. Ensure that all four pins are connected. Reseat diskette drive data and power another diskette. 2. Delete unneeded files from diskette. Enter Service Reference Guide, dc7700 433612-001 D-7 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 226
Troubleshooting Without Diagnostics Solving Diskette Problems (Continued) Problem Cause Cannot format diskette. (continued) Legacy diskette writes are disabled in Computer Setup. A problem has occurred with a disk transaction. The directory structure is bad, or there is a problem with a file. - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 227
Troubleshooting Without Diagnostics Solving Hard Drive Problems Solving Hard Drive Problems Problem Cause Hard drive error occurs. Hard disk has bad sectors or has failed. Disk transaction problem. Either the directory structure is bad or there is a problem with a file. Drive not found ( - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 228
Troubleshooting Without Diagnostics Solving Hard Drive Problems (Continued) Problem Cause Nonsystem disk/NTLDR missing message (continued) System is trying to start from the hard drive, but the hard drive may have been damaged. System files . D-10 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 229
that the lock tab located on the bottom of the Memory Stick/PRO card is not in the locked position. Check the manufacturer's documentation included with your card to see if it writable. Refer to the previous section for a list of compatible cards. Service Reference Guide, dc7700 433612-001 D-11 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 230
Troubleshooting Without Diagnostics Solving Media Card Reader Problems Unable to access data on the media card after inserting it into a slot. The media card is not inserted properly, is inserted in the wrong slot, or is not supported supported on the HP Desktop Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 231
Troubleshooting Without Diagnostics Solving Display Problems Solving Display Problems Problem Cause Block Emergency Recovery Mode (indicated by eight red blinks from the power LED and eight simultaneous beeps). Fixed-sync monitor will not sync Service Reference Guide, dc7700 433612-001 D-13 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 232
with HP memory. 4. Replace the system board. For systems with a graphics card: 1. Reseat the graphics card. Power on the system. 2. Replace the graphics card. 3. Replace the system board. For systems with integrated graphics, replace the system board. D-14 433612-001 Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 233
Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem Cause Blank screen and the power to the graphics card and the monitor. Install the video drivers included in the upgrade kit. Change requested resolution. Replace Service Reference Guide, dc7700 433612-001 D-15 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 234
Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem supports. Vibrating or rattling noise coming from inside a CRT monitor when powered Manually hp.com/support 1. Reseat the graphics card. 2. Replace the graphics card. D-16 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 235
Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem Cause Certain typed symbols do not appear correct. The font you are using does not support that particular Device Security >Audio. Turn on the external speakers. Service Reference Guide, dc7700 433612-001 D-17 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 236
to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and any unsaved data will be lost. Plug the headphones into the headphone connector on the front of the computer. D-18 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 237
hard disk. You can also try recording the audio file in a compressed format. Solving Printer Problems Solving Printer Problems Problem Cause Printer will not print. Printer is not turned on and online. The correct printer driver for the application are not installed. Printer will not turn - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 238
Troubleshooting Without Diagnostics Solving Keyboard and Mouse Problems Solving Keyboard and Mouse Problems Problem may be on. Solution 1. On the Windows Desktop, click Start. 2. Click Shut Down. The and keyboard. Press the power button to resume from standby mode Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 239
Troubleshooting Without Diagnostics Solving Keyboard and Mouse Problems (Continued) Problem . 3. Reset receiver and mouse. Press the power button to resume from standby mode. Mouse will resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 240
Troubleshooting Without Diagnostics Solving Hardware Installation Problems power. Power off the computer and remove the power cord before proceeding. Solving Hardware Installation Problems Problem the computer and follow the instructions for accepting the changes. Use Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 241
the problem is resolved Bad option card. 1. Check each option card by removing the cards one at time (if multiple cards), then power on the system to see if fault goes away. 2. Once bad card is identified, remove and replace bad option card. 3. Replace the system board. Service Reference Guide - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 242
Troubleshooting Without Diagnostics Solving Network Problems These guidelines do not discuss the process of debugging the network cabling. Solving Network Problems Problem Cause Wake-on-LAN feature is not functioning. Wake-on-LAN is not enabled. Network driver does not detect network - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 243
correct network client and protocol is installed. Select the Network icon in the Control Panel and configure the network controller. Under the Computer Setup Advanced menu, change the resource settings for the board. Verify that the drivers were not accidentally deleted when the drivers for a new - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 244
Troubleshooting Without Diagnostics Solving Network Problems (Continued) Problem Cause Network controller stops working without apparent cause. ( and that the Remote System Installation Server contains the NIC drivers for your NIC. Flash the ROM. D-26 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 245
Troubleshooting Without Diagnostics Solving Memory Problems Ä CAUTION: Power may still be supplied to the DIMMs when the computer is turned off (depending on the Management Engine (ME) settings). To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 246
-party memory with HP memory. 4. Replace the system board. Solving Processor Problems . Solving Processor Problems Problem Cause Poor performance is experienced. Processor is hot. Power LED the processor is present. 2. Reseat the processor. D-28 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 247
If it is listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed drive, run in Advanced > Power-On Options. See the documentation that came with the optional device. Service Reference Guide, dc7700 433612-001 D-29 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 248
Troubleshooting Without Diagnostics Solving CD-ROM and DVD Problems (Continued) Problem Cause Solution Movie will not play in the DVD drive. Movie may be regionalized for a the system board. Disconnect the drive cable from the system board. D-30 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 249
Troubleshooting Without Diagnostics Solving Drive Key Problems Solving Drive Key Problems Problem Drive Key. The device was not properly seated before power-up. Boot order is not correct. Removable Media Device: Supported USB Flash Media Device" section of the Service Reference Guide. Install - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 250
Troubleshooting Without Diagnostics Solving Front Panel Component Problems Solving Front Panel Component Problems Problem Cause power, be sure one end is connected to the device and one end is connected to a live outlet. The correct device driver is not installed. 1. Install the correct driver - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 251
Troubleshooting Without Diagnostics Solving Internet Access Problems Solving Internet Access Problems Problem Cause Unable to connect to the Internet. Internet Service Provider (ISP) account is not set up properly. Modem is not set up properly. Web browser is not set up properly. Cable/DSL - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 252
usage, verify the modem is enabled. 9. If there are further problems, click the Troubleshoot button and follow the on-screen instructions. Windows 2000 1. Select Start > Settings > Control Panel. 2. , verify that the modem is working properly. D-34 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 253
, click the Troubleshoot button and follow the on-screen instructions. Solving Software Problems Most software problems occur as a result of the following: ■ The application was not installed or configured correctly. ■ There is insufficient memory available to run the application. ■ There is - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 254
Troubleshooting Without Diagnostics D-36 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 255
but not all HP system and riser boards. Designator Component BAT Battery socket/Battery CR1 LED - 5V_Aux (on) CR2 Health-LED CR3 UID LED CR4 Power LED CR35 E14 Keyboard connector, PS/2 (Closest to power supply) J67 Mouse connector, PS/2 Service Reference Guide, dc7700 433612-001 E-1 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 256
pin) Second P/S connector (as required) Processor 12V header Secondary Processor 12V header Main Power/HDD LED connector Speaker connector Analog audio connector (from CD-ROM) Primary chassis fan header IDE/MultiBay connector Header for NEWCARD E-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 257
2 MultiBay header SCSI LED connector PCI extender slot (female) Blade PC graphics connector (outboard) Blade PC graphics connector (inboard) Second serial port Primary serial port Double northbridge/southbridge) North bridge South bridge Super I/O Service Reference Guide, dc7700 433612-001 E-3 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 258
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 Secondary NIC clock crystal RTC clock crystal/tie-down E-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 259
6400 800 MHz-compliant ■ 1.8volt DDR2-SDRAM DIMMs The DDR2-SDRAM DIMMs must also: ■ support CAS latency 4 (DDR2/533 MHz and DDR2/667 MHz) and CAS latency 5 (DDR2/667 XMM2 operate in memory channel A. Sockets XMM3 and XMM4 operate in memory channel B. Service Reference Guide, dc7700 433612-001 F-1 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 260
to single channel. For optimal speed, the channels should be balanced so that the largest amount of memory is spread between the two channels. For example, if you are populating the sockets with one 1GB determined by the slowest DIMM in the system. F-2 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 261
and replacement 6-20 proper handling 5-8 cable connections CMT 6-10 SFF 7-11 USDT 8-12 cable lock 3-25 CMT 6-4 SFF 7-5 USDT 8-3 cable management CMT 6-9 SFF 7-10 USDT 8-11 cable pinouts SATA data 4-2 SATA power 4-2 cautions AC power 5-1 adding devices 1-1 cables 5-8 cooling fan 5-7 cover lock - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 262
10 conversion CMT desktop to minitower 6-39 CMT minitower to desktop 6-42 Convertible Minitower See CMT country-specific power cord set requirements B-2 cover lock, smart 3-24 D date and time display problems D-2 DDR2 memory F-1 deleting password 3-21 delimiter characters, table 3-22 device drivers - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 263
and replacement 8-17 expansion slot cover CMT removal and replacement 6-13 SFF removal and replacement 7-14 external 3.5-inch drive SFF removal and replacement 7-25 F FailSafe key 3-25 CMT 6-2 SFF 7-2 fan shroud, SFF removal and replacement 7-30 fan, power supply 5-7 Fault Notification and Recovery - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 264
assembly CMT removal and replacement 6-27 SFF removal and replacement 7-44 power-on password changing 3-21 deleting 3-21 entering 3-20 Power-On Self-Test (POST) 2-1 Preboot Execution Environment (PXE) 3-3 Proactive Change Notification (PCN) 3-8 Index-4 433612-001 Service Reference Guide, dc7700 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 265
D-33 keyboard D-20 media card reader D-11 memory D-27 mouse D-20 network D-24 optical drives D-29 power supply D-5 printer D-19 processor D-28 software D-35 Wake-on-LAN D-24 processor CMT removal and replacement 6-34 problem solving D-28 SFF removal and replacement 7-33 USDT removal and replacement - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 266
access memory) F-1 security CMT 6-4 DriveLock 3-22 fingerprint identification technology 3-26 HP ProtectTools Security Manager 3-5 password 3-19 SFF 7-5 USDT 8-3 security features overview 3-17 serial interface pin assignments A-3 service considerations 5-7 setup password changing 3-21 deleting 3-21 - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 267
surge-tolerant power supply 3-26 system board CMT removal and replacement 6-28 reference designators E-1 SATA connectors 4-1 SFF removal and replacement 7-39 USDT removal and replacement 8-25 T tamper-proof screws CMT 6-2 SFF 7-2 tool 5-7 temperature control 5-5 thermal sensor 3-26 tools, servicing - HP dc72 | HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Edit - Page 268
ROM BIOS Flash 3-9 replicating setup 3-12 replicating setup, BIOS utility 3-12 Restore Plus! CD 1-2 ROM BIOS Flash 3-9 Subscriber's Choice 3-9 support software 3-16 support software CD subscription 1-1 wrench, tamper-resistant CMT 6-2 SFF 7-2 Index-8 433612-001 Service Reference Guide, dc7700
service reference guide
HP Compaq dc7700 Business PC
1st Edition
This document provides information on the removal and replacement of all
parts as well as information on troubleshooting, Desktop Management, setup
utilities, PATA and SATA drives, safety, routine care, connector pin
assignments, POST error messages, and diagnostic indicator lights.
Document Part Number 433612-001