Compaq dc5750 HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio
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- Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 1
service reference guide HP Compaq dc5750 Buxsiness 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, SATA drives, safety, routine care, connector pin assignments, POST error - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 2
- Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 3
Service Reference Guide HP Compaq dc5750 Business PC 1st Edition Document Part Number: 437963-001 November 2006 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 4
Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Microsoft, MS-DOS, Windows, Windows NT, and Windows XP loss of information. Service Reference Guide HP Compaq dc5750 Business PC First Edition (November 2006) Document Part Number: 437963- - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 5
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 Computer Setup (F10) Utilities 2-3 2.2.2 Computer Setup - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 6
4-2 4.2.2 SATA Power Cable 4-2 4.3 PATA Device Information 4-3 4.4 ATA SMART Drives 4-3 4.5 Hard Drive Capacities 4-3 5 Identifying the Chassis, Routine Care, and Disassembly Preparation 5.1 Chassis Designations 5-1 5.1.1 Small Form Factor (SFF 5-1 5.1.2 Microtower (MT 5-2 5.2 Electrostatic - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 7
6-29 6.15Speaker 6-31 6.16Power Supply 6-32 6.17System Board 6-33 6.18Battery 6-34 6.18.1Type 1 Battery Holder 6-35 6.18.2Type 2 Battery Holder 6-36 6.18.3Type 3 Battery Holder 6-37 7 Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.1 Preparation for Disassembly - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 8
19.2Type 2 Battery Holder 7-34 7.19.3Type 3 Battery Holder 7-35 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 vi 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 9
on how to purchase a 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, dc5750 437963-001 1-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 10
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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 11
the system is turned on. POST checks the following items to ensure that the computer system is functioning properly: ■ Keyboard ■ Memory modules ■ All mass storage devices ■ Processors ■ Controllers ✎ If the Power-On Password is set, a key icon appears on the screen while POST is running. You will - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 12
restarts (warm boots) as well as during power-on. ■ Establish a setup password that controls access to Computer Setup (F10) Utility and the settings described in this section. ■ Secure integrated I/O functionality, including the serial, USB, or parallel ports, audio, or embedded NIC, so that they - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 13
system defaults. Ä CAUTION: Do NOT turn the computer power OFF while the BIOS is saving the F10 Computer Setup changes because the CMOS could become corrupted. It is safe to turn off all power to the computer only after exiting the F10 Setup screen. Service Reference Guide, dc5750 437963-001 2-3 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 14
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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 15
Diskette (treated as diskette drive). Hard disk None (prevents BIOS data accesses and disables it as a boot device) Hard disk (treated as hard drive) ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 437963-001 2-5 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 16
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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 17
supports accessing the SATA devices via AHCI (e.g. Windows Vista) and AHCI accesses are desired. ✎ Windows 2000 and Windows XP require a third-party device driver Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 437963- - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 18
/Disable Setup Browse Mode (appears if a setup password is set) (allows viewing, but not changing, the F10 Setup Options without entering setup password) ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-8 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 19
breaches. • Intel Virtualization Technology (some models) (enable/disable). Changing this setting requires turning the computer off and then back on. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 437963-001 2-9 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 20
supported) and S3 use 1 blink per second. Hardware Power Management SATA power management enables or disables SATA bus and/or device power management. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-10 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 21
fan speed. The fans are still automatically controlled. Advanced* *For advanced users only Power-On Options Allows you to set: • POST Computer (F10) Setup. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 437963- - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 22
"boot" or primary VGA controller. ✎ In order to see this entry, you must enable integrated video (Advanced > Device Options) and Save Changes and Exit. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2-12 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 23
• Internal speaker (some models) (does not affect external speakers) • Monitor Tracking (enable/disable). Allows BIOS to save monitor asset information. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 437963-001 2-13 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 24
Support for specific Computer Setup options may vary depending on the hardware configuration. 2.2.3 Recovering the Configuration Settings This method of recovery issues. The Survey tab is displayed when you invoke HP Insight Diagnostics. This tab shows the current configuration of the computer. - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 25
-Shows HP Insight Diagnostic version, computer configuration memory (CMOS) information, and system management BIOS data. Storage-Shows information about storage media connected to the computer. This list includes all fixed disks, diskette drives, and optical drives. Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 26
the computer model, processor, chassis, and BIOS, plus internal speaker and PCI bus information. in controlling the testing of a system. The Custom Test mode allows you to specifically select display more detailed information and recommended actions. 2-16 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 27
that should help solve the problem. To find an error code description quickly, enter the code in the box at the top of the tab and click the Find Error Codes button. The Test Components tab displays low level information on tests that are run. Service Reference Guide, dc5750 437963-001 2-17 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 28
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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 29
information to help you select 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, dc5750 437963-001 3-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 30
on the computer. When installed, it enables communication with the HP OpenView management console. To install the Radia Management Agent: 1. Click Start. 2. Click All Programs. 3. Click HP Manageability. 4. Click Radia Management Agent Readme. 5. Review and follow the instructions contained in - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 31
receive health status information, and manage system BIOS settings by communicating directly with the client computer, reducing the need for agent or connector software to achieve integration. ✎ Some scripts are needed to access the HP CMI interface. Service Reference Guide, dc5750 437963-001 3-3 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 32
drivers and BIOS updates without visiting each PC ■ Remotely configure BIOS and security settings ■ Automate processes to quickly resolve hardware problems Tight integration with HP Instant Support tools reduces hardware troubleshooting time. ■ Diagnostics-remotely run & view reports on HP desktop - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 33
http://www.hp.com/go/easydeploy. 3.3.6 HP Client Foundation Suite The HP Client Foundation Suite (HP CFS) is designed for organizations wanting essential client management functionality. It combines: ■ HP Client Manager ■ HP Systems Insight Manager Connector Service Reference Guide, dc5750 437963 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 34
software related problems, and ensure the software supporting their business operations is reliable and secure. For more information on HP OpenView PC Configuration Management Solution, visit http://h20229.www2.hp.com/solutions/ascm/index.html. 3-6 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 35
of the computer. Should you need or want to upgrade the BIOS, you may download the latest BIOS images from the HP driver and support page: http:\\h18000.www1.hp.com/support/files. CAUTION: For maximum ROM protection, be sure to establish a setup password. The setup password prevents unauthorized - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 36
computer must be powered on, or turned on through Remote Wakeup, to take advantage of Remote ROM Flash. For more information on Remote ROM Flash, refer to the HP Client Manager or System Software Manager at http://h18000.www1.hp.com/im/prodinfo.html. 3-8 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 37
FAT12, 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. Service Reference Guide, dc5750 437963-001 3-9 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 38
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. 3-10 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 39
media device. 8. Download a BIOS utility for replicating setup (repset.exe) and copy it onto the configuration diskette or USB flash media device. To obtain this utility, go to http://www.hp.com, click Software and Driver Downloads, and enter the model number of the computer. 9. On the configuration - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 40
Desktop Management Creating a Bootable Device Supported USB Flash Media Device Supported devices have a preinstalled image to simplify the process of making them bootable. All HP or Compaq and most other example, the system's internal hard drive). 3-12 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 41
turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. ✎ If you do not press F10 at the appropriate time, you must restart the computer and again press F10 when the monitor light turns green to access the utility. Service Reference Guide, dc5750 437963-001 3-13 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 42
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. 3-14 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 43
latest support software easier. You can download the software from http://www.hp.com/support. The Web site contains the latest device drivers, utilities, and flashable ROM images needed to run the latest Microsoft Windows operating system on the HP computer. 3.4.7 Industry Standards HP management - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 44
the Embedded Security device. • Reset the device to Factory Settings. ✎ 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. 3-16 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 45
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. Service Reference Guide, dc5750 437963-001 3-17 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 46
must restart the computer and again press F10 when the monitor light turns green to access the utility. 3. Select Security, then select Setup Password and follow the instructions on the screen. 4. Before exiting, Select File > Save Changes and Exit. 3-18 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 47
do not press F10 at the appropriate time, you must restart the computer and again press F10 when the monitor light turns green to access the utility. 3. Select Security, then Power-On Password and follow the instructions on the screen. 4. Before exiting, select File > Save Changes and Exit. Entering - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 48
Security Manager Guide at www.hp.com. 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. To change the Power-On password, go to step 3. To change the Setup password, as soon as the computer is turned on, press F10 when the monitor light turns - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 49
computer. Refer to the Troubleshooting Guide on the Documentation and Diagnostics CD for instructions on clearing passwords. If the system is equiped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at www.hp . Service Reference Guide, dc5750 437963-001 3-21 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 50
been designed to protect. Access to Computer Setup and DriveLock can be restricted through the Setup password. By specifying a Setup password and not giving it to end users, system administrators are able to restrict users from enabling DriveLock. 3-22 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 51
unlocked position. Ä CAUTION: For maximum cover lock security, be sure to establish a setup password. The setup password prevents unauthorized access to the Computer Setup utility. ✎ The Smart Cover Lock is available as an option on some systems. Service Reference Guide, dc5750 437963-001 3-23 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 52
3.5.6 Cable Lock Provision The rear panel of the computer accommodates a cable lock so that the computer can be physically secured to a work area. For illustrated instructions, please see the Removal and Replacement chapter for the specific chassis. 3-24 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 53
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 when the computer - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 54
Desktop Management 3-26 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 55
ATA = SATA Parallel ATA = PATA HP only supports the use of SATA drives on these models of computer. No PATA drives are supported on these models. 4.1 SATA Hard an error on the application of the attach rules, a POST error message may be displayed. Service Reference Guide, dc5750 437963-001 4-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 56
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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 57
10 while calculations by Microsoft are bytes to the base 2. Drive/Partition Capacity Limits File System FAT 32 NTFS Controller Type ATA ATA Operating System Windows 2000/ XP Windows NT/2000/XP Maximum Size Partition 32 GB 2 TB Drive 2 TB 2 TB Service Reference Guide, dc5750 437963-001 4-3 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 58
Serial and Parallel ATA Drive Guidelines and Features 4-4 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 59
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 Small Form Factor (SFF) Service Reference Guide, dc5750 437963-001 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 60
Identifying the Chassis, Routine Care, and Disassembly Preparation 5.1.2 Microtower (MT) 5-2 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 61
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, dc5750 437963-001 5-3 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 62
or PCB laminate. Handle them only at static-free work areas. ■ Turn off power and input signals before inserting and removing connectors or test equipment. ■ Use fixtures -dissipative table or floor mats with hard tie to ground ■ Field service kits 5-4 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 63
material. ■ Install or enable power management functions of the operating system or other software, including sleep states. 5.4 Routine Care 5.4.1 General Cleaning Safety Precautions 1. Never use solvents or flammable solutions to clean the computer. Service Reference Guide, dc5750 437963-001 5-5 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 64
clean, lint-free cloth. ■ Occasionally clean the air vents on the computer. Lint and other foreign matter can block the vents and limit the in Section 5.4.2. When cleaning debris from under the keys, review all rules in Section 5.4.1 before following these procedures: Ä Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 65
from the power source before opening the computer to prevent system board or component damage. 5.5.2 Tools and Software Requirements To service the computer, you need the following: ■ Torx T-15 screwdriver (HP screwdriver with bits, PN 161946-001) ■ Torx T-15 screwdriver with small diameter shank - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 66
CPU. ■ Avoid dropping drives from any height onto any surface. ■ If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard drive while the computer , or products that have magnetic fields such as monitors or speakers. 5-8 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 67
5.5.6 Lithium Coin Cell Battery The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years. See the appropriate removal and replacement chapter for the chassis you are working on in this guide for instructions on the replacement - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 68
Identifying the Chassis, Routine Care, and Disassembly Preparation 5-10 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 69
Microtower (MT) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit. Service Reference Guide, dc5750 437963-001 6-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 70
Microtower (MT) Chassis 6.2 External Security Devices 6.2.1 Installing a Cable Lock The cable lock may be used to secure the computer access panel to the chassis and, at the same time, secure the computer to a fixed object. Insert the cable lock in the location shown below. 6-2 437963-001 Service - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 71
and Replacement Procedures- Microtower (MT) Chassis 6.2.2 Installing a Padlock A padlock may be used by itself to secure the access panel to the computer chassis. A padlock may also be used with a security cable to secure the computer to a fixed object. I Service Reference Guide, dc5750 437963-001 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 72
Removal and Replacement Procedures- Microtower (MT) Chassis 6.3 Access Panel 1. Prepare the computer for disassembly (Section 6.1). Ä CAUTION: Before removing the computer access panel, ensure that the computer is turned off and that the power cord is disconnected from the electrical outlet. 2. - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 73
Removal and Replacement Procedures- Microtower (MT) Chassis 6.4 Front Bezel 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel (Section 6.3). 3. To remove the away from the chassis 2 to release the top of the bezel. Service Reference Guide, dc5750 437963-001 6-5 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 74
Removal and Replacement Procedures- Microtower (MT) Chassis To reinstall the front bezel: 1. Position the chassis in the upright position. 2. Insert the two hooks the bezel onto the chassis 2 so that the bottom two hooks on the bezel snap into place. 6-6 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 75
and Replacement Procedures- Microtower (MT) Chassis 6.5 Front Drive Bezels Follow these steps before removing or installing a front drive bezel. 1. Prepare the computer for disassembly ( To install a bezel blank, reverse the removal procedure. Service Reference Guide, dc5750 437963-001 6-7 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 76
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. 6-8 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 77
Procedures- Microtower (MT) Chassis 6.6.1 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 P1 Power Supply CPU power P3 Power Supply 2nd SATA Hard drive P4 Power Supply 1st - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 78
module with the tab on the memory socket. It may be easier to install a memory module in some cases if the main power cable from the power supply to the system board is temporarily disconnected. The computer automatically recognizes the additional memory when the computer is turned on. 4. Push the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 79
rear of the computer, a sliding slot cover lock secures the expansion card brackets and expansion slot covers in place. Remove the captive thumbscrew that holds the slot cover lock in place 1 and slide the slot cover lock up and off the chassis 2. Service Reference Guide, dc5750 437963-001 6-11 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 80
Removal and Replacement Procedures- Microtower (MT) Chassis 4. Before installing an expansion card, remove the expansion slot cover or the existing expansion card. ✎ the chassis frame. Be sure not to scrape the card against the other components. 6-12 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 81
Removal and Replacement Procedures- Microtower (MT) Chassis c. If removing a PCI Express x16 card, pull the retention arm on the back of replace it with a new card or expansion slot cover for proper cooling of internal components during operation. Service Reference Guide, dc5750 437963-001 6-13 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 82
Removal and Replacement Procedures- Microtower (MT) Chassis 7. If replacing or adding a new expansion card, hold the card just above the expansion slot on to the installed card, if needed. Connect internal cables to the system board, if needed. 6-14 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 83
Procedures- Microtower (MT) Chassis 6.9 Drives The computer supports up to five 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 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 84
(Section 6.4). 5. Disconnect the power and data cables from the back of the drive, as shown in the following illustrations. Disconnecting Optical Drive Cables ✎ Some products use straight cable connectors while others use right angle connectors. 6-16 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 85
Removal and Replacement Procedures- Microtower (MT) Chassis Disconnecting Diskette Drive Cables Releasing the its drive bay 2. 7. Remove the four guide screws (two on each side) from the old drive. You will need these screws to install a new drive. Service Reference Guide, dc5750 437963-001 6-17 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 86
extremes, or products that have magnetic fields such as monitors or speakers. ✎ An optical drive is a CD-ROM, CD-R/RW, DVD-ROM, DVD+R/RW, or CD-RW/DVD Combo drive. The system does not support Parallel ATA (PATA) optical drives. 1. Install four guide screws (two on each side) into the new drive - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 87
- Microtower (MT) Chassis 2. Slide the drive into the drive bay, making sure to align the guide sctrews with the guide slots, until the drive snaps into place. 3. Reconnect the power and cable connectors while others use right angle connectors. Service Reference Guide, dc5750 437963-001 6-19 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 88
hard drive, the Restore Plus! CD may be used to restore the operating system, software drivers, and/or 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 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 89
(Section 6.4). 5. Disconnect the power 1 and data 2 cables from the back of the drive. 6. Remove the power cable 1 and primary data cable 2 and secondary data cable (if necessary) 3 from the cable retainers to make it easier to access the drive. Service Reference Guide, dc5750 437963-001 6-21 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 90
Procedures- Microtower (MT) Chassis 7. Release the drive by pulling the green release tab away from the drive 1 and sliding the drive out of the bay 2. 8. Remove the four guide screws ( sure to install the appropriate guide screws into the drive. 6-22 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 91
hard drive, use the power connector labeled P5. If you are installing a secondary hard drive use the power cable labeled P4. 12. If installing a new drive, connect the oppposite end of the data cable to the appropriate system board connector. Service Reference Guide, dc5750 437963-001 6-23 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 92
replaced the primary hard drivem use the Restore Plus! CD set that was created when starting the computer for the first time. When the restore process has completed, reinstall any personal files that were backed up before replacing the hard drive. 6-24 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 93
and Replacement Procedures- Microtower (MT) Chassis 6.10 Chassis Fan 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on (Section 6.3). 3. Disconnect the power cable that - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 94
Removal and Replacement Procedures- Microtower (MT) Chassis 6.11 Front Shroud 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel and rotate the computer so the system board the shroud, reverse the removal process. 6-26 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 95
inside of the chassis 2. To install the housing assembly, reverse the removal procedures. ✎ When installing the housing, insert the power-button end into the opening and then rotate the USB end into position before inserting the retaining screw. Service Reference Guide, dc5750 437963-001 6-27 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 96
Removal and Replacement Procedures- Microtower (MT) Chassis 6.13 Heatsink 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel and rotate the computer so the system board is parallel to require replacing the system board. 6-28 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 97
Microtower (MT) Chassis 6.14 Processor 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the computer cover (Section 6.3). 3. Disconnect the heatsink control captive screws and attach the heatsink control cable to the system board. Service Reference Guide, dc5750 437963-001 6-29 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 98
Removal and Replacement Procedures- Microtower (MT) Chassis Ä CAUTION: Heatsink retaining screws should be 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. 6-30 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 99
Removal and Replacement Procedures- Microtower (MT) Chassis 6.15 Speaker 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel and rotate the computer so the system board is parallel when viewed from inside the chassis.. Service Reference Guide, dc5750 437963-001 6-31 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 100
Removal and Replacement Procedures- Microtower (MT) Chassis 6.16 Power Supply Å WARNING: Voltage is always present on the system board when the computer is plugged into an active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected from the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 101
and Replacement Procedures- Microtower (MT) Chassis 6.17 System Board 1. Prepare the computer for disassembly (Section 6.1). 2. Remove the access panel and rotate the computer so the system board the system board, reverse the removal procedures. Service Reference Guide, dc5750 437963-001 6-33 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 102
Procedures- Microtower (MT) Chassis 6.18 Battery The battery that comes with your computer provides power to the real-time clock and has a lifetime of about three years. When replacing the battery, use a battery equivalent to the battery originally installed on the computer. The computer comes with - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 103
Replace the computer access panel (Section 6.3). 5. Plug in the computer and turn on power to the computer. 6. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Service Reference Guide, dc5750 437963-001 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 104
cover or access panel (Section 6.3). 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. 6-36 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 105
place. 3. Replace the computer access panel (Section 6.3). 4. Plug in the computer and turn on power. 5. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Service Reference Guide, dc5750 437963-001 6-37 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 106
Removal and Replacement Procedures- Microtower (MT) Chassis 6-38 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 107
7 Removal and Replacement Procedures- Small Form Factor (SFF) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 108
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.2 External Security Devices 7.2.1 Cable Lock The cable lock may be used to secure the access panel to the chassis and, at the same time, secure the computer to a fixed object. Insert the cable lock in the location shown below. - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 109
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.3 Access Panel 1. Prepare the computer for disassembly (Section 7.1). Ä CAUTION: Before removing the access panel, ensure that the computer is turned off and that the power cord is disconnected from the electrical outlet. 1. Push - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 110
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.4 Front Bezel 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel (Section 7.4). 3. Press install the afront bezel, reverse the removal procedure. 7-4 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 111
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.5 Front Drive Bezels 1. Prepare the computer for disassembly (Section 7.1). on the computer configuration. Install a bezel or a bezel blank by pushing the bezel into place. Service Reference Guide, dc5750 437963-001 7-5 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 112
Small Form Factor (SFF) Chassis 7.6 Cable Management The Small Form Factor chassis is a very compact computer and proper routing of the internal cables is critical to the operation of the computer damage the cable and result in a failed power supply. 7-6 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 113
- Small Form Factor (SFF) Chassis 7.6.1 Cable Connections System board connectors are color-coded to make it easier to find the proper connection. Cable To Cable Designator Power Supply Main power, P1 P1 Power Supply 1st SATA Hard drive P2 Power Supply CPU power P3 Power Supply 2nd - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 114
Small Form Factor (SFF) Chassis 7.7 Drives A Torx T-15 screwdriver is needed to remove and install the guide run the Restore Plus! CD to load the HP factory-installed files. 7.7.1 Drive Positions Drive Positions Item computer, run Computer Setup. 7-8 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 115
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.7.2 Optical Drive Ä CAUTION: All removable media should be taken out of the drives before removing the drive from the computer. ✎ An optical drive is a CD-ROM, CD-R/RW, DVD-ROM, DVD+R/RW, or CD-RW/DVD Combo drive. 1. Prepare the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 116
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 6. Remove the two M3 metric guide screws in the lower holes on each side of th edrive. HP has provided four extra M3 metric guide screws on the front of the chassis, under the front bezel. The M3 metric guide screws are black. Ä - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 117
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 8. Connect the power 1 cable and data 2 cables to the rear of the optical drive. 9. Complete the installation of the drive by reversing the remainder of the removal process. Service Reference Guide, dc5750 437963-001 7-11 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 118
- Small Form Factor (SFF) Chassis 7.7.3 External 3.5-inch Drive 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel (Section 7.3). 3. Remove the front bezel (Section 7.4). 4. Remove the optical drive (Section 7.7.2). 5. .Disconnect the data 1 and power 2 cables - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 119
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7. Tilt the left side of the drive down slightly 1 so that the top lip of the guide screws are not caught behind the metal frame, the pull . The screws take the place of drive rails. Service Reference Guide, dc5750 437963-001 7-13 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 120
Small Form Factor (SFF) Chassis 7.7.4 Hard Drive A Torx T-15 screwdriver is needed to remove and install the guide such as monitors or speakers. 1. IPrepare the computer for disassembly power 1 and data 2 cables from the back of the hard drive. 7-14 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 121
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7. Press down on the lever to the left of the hard drive 1, slide the drive back until it stops, and lift it straight up 2. 8. Tilt the left side of the hard drive down slightly 1 so that the top lips of the guide screws are not - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 122
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis ✎ If the system has only one SATA hard drive, the data cable must be connected to the dark blue connector labeled SATA0 on the system board to avoid any hard drive performance problems. If you are adding a second drive, connect the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 123
Removal and Replacement Procedures- Small Form Factor (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 modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 124
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis ✎ A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket. 7. Push the module down into the socket, ensuring that the module is fully inserted and properly seated. Make sure - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 125
Small Form Factor (SFF) Chassis 7.9 Expansion Card 7.9.1 Expansion Card Retainer 1. Turn off the computer properly through the operating system, then turn off any external devices. 2. Disconnect the power cord from the power inside of the chassis. Service Reference Guide, dc5750 437963-001 7-19 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 126
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 6. If you are removing an existing PCI card, hold the card at each end, card against the other components.. To complete the installation, reverse the removal procedures. 7-20 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 127
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.10 Power Supply Å WARNING: Voltage is always present on the system board when the computer is plugged into an active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 128
Procedures- Small Form Factor (SFF) Chassis 7.11 Fan Shroud 1. Prepare the computer for disassembly computer. To replace the shroud, reverse the removal procedures. ✎ When replacing the shroud, make sure that it does not get caught on any wires. 7-22 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 129
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.12 Front I/O Device 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel (Section 7.3). 3. Remove the fan shroud (Section 7.11). 4. Remove the optical drive (Section 7.7.2). 5. Rotate the optical drive - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 130
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.13 Chassis Fan 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel (Section 7.3). 3. Remove the fan shroud (Section 7.11). 4. Disconnect the chassis fan power cable from the system board. 5. Remove - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 131
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.14 Power Switch Assembly 1. Prepare the computer for disassembly (Section 7.1). 2. Remove to its upright position. 6. Disconnect the power switch/LED cable from the system board. Service Reference Guide, dc5750 437963-001 7-25 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 132
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7. Squeeze the switch holder retaining clips together at the front of the chassis 1 and push the switch assembly out of the chassis 2. Push the two LEDs out of the chassis 3. To install the power switch and LEDs, reverse the removal - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 133
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.15 Speaker 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel(Section 7.3). 3. Remove the To install the speaker, reverse the removal procedures. Service Reference Guide, dc5750 437963-001 7-27 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 134
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.16 Heatsink 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel (Section 7.3). 3. Remove install the fan shroud may cause the computer to overheat. 7-28 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 135
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.17 Processor 1. Prepare the computer for disassembly (Section 7.1). 2. Remove the access panel(Section 7.3). 3. screws and attach the heatsink control cable to the system board. Service Reference Guide, dc5750 437963-001 7-29 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 136
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis Ä CAUTION: Heatsink retaining screws should be 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. 7-30 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 137
Replacement Procedures- Small Form Factor (SFF) Chassis 7.18 System Board 1. Prepare the computer for disassembly ( memory modules (Section 7.8). 8. Disconnect all data and power cables from the system board. 9. Remove the power supply power supply. Service Reference Guide, dc5750 437963-001 7-31 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 138
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7.19 Battery The battery that comes with this computer provides power to the real-time clock and has a lifetime of about three years. When replacing the battery, use a battery equivalent to the battery originally installed on the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 139
. 4. Replace the computer access panel. 5. Plug in the computer and turn on power to the computer. 6. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Service Reference Guide, dc5750 437963-001 7-33 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 140
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 Computer Setup. Refer to the Computer Setup (F10) Utility Guide. 7-34 437963-001 Service Reference Guide - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 141
- Small Form Factor (SFF) Chassis 7.19.3 Type 3 Battery Holder 1. Pull back on the clip 1 that holds the battery in place, then remove the battery 2. 2. Insert the new battery and position the clip back in place. 3. Replace the computer access panel. 4. Plug in the computer and turn on power to - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 142
Removal and Replacement Procedures- Small Form Factor (SFF) Chassis 7-36 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 143
for many computer and workstation connectors. Some of these connectors may not be used on the product being serviced. Keyboard Connector +5 VDC 5 Clock 6 Unused Ethernet BNC Connector and Icon Pin 1 (Center) 2 (Shield) Signal Data Ground Service Reference Guide, dc5750 437963-001 A-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 144
Icon Pin 1 2 3 4 5 6 7 8 Ethernet AUI Connector and Icon Signal (+) Transmit Data (-) Transmit 7 10 Acknowledge 11 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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 145
1 (Tip) 2 (Ring) 3 (Shield) Signal Left audio and power Right audio and power Ground Headphone Connector and Icon (1/8" miniphone) 1 23 Pin Audio Connector and Icon (1/8" miniphone) 1 23 Pin 1 (Tip) 2 (Ring) 3 (Shield) Signal Audio_In_Left Audio_In_Right Ground Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 146
Audio Connector and Icon (1/8" miniphone) 1 23 Pin 1 (Tip) 2 (Ring) 3 (Shield) Signal Audio_Out_Left Audio_Out_Right Ground External Infrared Transceiver Connector and Icon Pin Signal 1 Transmit 2 Receive 3 Ground Monitor DDC Serial Clock A-4 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 147
Connector Pin Assignments Pin Signal 1 Reset 2 Ground 3 DD7 4 (cable detect) 35 DA0 36 DA2 37 CS1FX 38 CS3FX 39 DASP 40 Ground 24-Pin Power (CMT and MT models) Connector 24 13 Pin Signal 1 +3.3 V 2 +3.3 V 3 GND 4 +5 V 24 GND Service Reference Guide, dc5750 437963-001 A-5 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 148
and CMT models) Connector and Icon Pin 1 2 3 4 CMT and MT Signal GND GND +12 V CPU -12 V CPU 6-Pin Power (for CPU) (USDT, SFF, and ST models) Connector and Icon Pin Signal 1 GND 2 GND 3 GND 4 6 4 12 V CPU 5 12 V CPU 6 +12 V A-6 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 149
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, dc5750 437963-001 A-7 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 150
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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 151
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, dc5750 437963-001 A-9 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 152
- 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 T.M.D.S. Data Shield 23 T.M.D.S. Clock+ 24 T.M.D.S. Clock- A-10 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 153
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, dc5750 437963 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 154
Power Cord Set Requirements Country-Specific Requirements Additional requirements specific to a country are shown in parentheses and explained below. Country Accrediting Agency with a Japanese Industrial Standard C8303 (7A, 125V) configuration. B-2 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 155
from being downloaded during POST to free more 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, dc5750 437963-001 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 156
battery. Reset the date and time under Control Panel (Computer Setup can also be used). If the problem persists, replace the RTC battery. Check for proper placement of the CMOS jumper, if applicable. Press the F1 key to save the memory changes. 1. Run Computer Setup (F10 Setup) or Windows utilities - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 157
Computer Setup and reset the IRQ in Advanced > Onboard Devices. 1. Reseat the graphics card (if applicable). 2. Clear CMOS. 3. Verify that the monitor is attached and turned on. 4. Replace the graphics card (if applicable). Reflash the system ROM with the latest BIOS image Service Reference Guide - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 158
allow system to reconfigure without the drive. Run Computer Setup and check the configuration 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 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 159
/problem with Computer Setup or Windows utilities. Enter Computer Setup and reset the IRQ in Advanced > Onboard Devices. Enter Computer Setup and reset the IRQ in Advanced > Onboard Devices. Enter Computer Setup and reset the IRQ in Advanced > Onboard Devices. Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 160
> SATA Emulation back to RAID and select File > Save Changes and Exit. 1. Upgrade BIOS to proper version. 2. Change the processor. 1. Run Computer Setup. If Setup already has data in the field or will not allow the serial number to be entered, download from http://www.hp.com and run SP5572.EXE - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 161
RAM failure. CPU fan not installed or disconnected in VSFF chassis. Recommended Action 1. Reconnect keyboard with computer 4. Replace keyboard. Run Computer Setup and diagnostic utilities. 1. Remove the access panel, press the power button, and see if Service Reference Guide, dc5750 437963-001 C-7 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 162
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 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 163
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. Service Reference Guide, dc5750 437963-001 C-9 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 164
the system board. Replace the system board. 1. Reflash the ROM with the latest BIOS image. See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide on the Documentation and Diagnostics CD. 2. Replace the system board. C-10 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 165
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 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 166
, 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. C-12 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 167
computer turned on? ■ Is the green power light illuminated? ■ Is the monitor turned on? ■ Is the green monitor light illuminated? ■ Turn up the monitor brightness and contrast controls if the monitor is between the NIC and the riser/system board? Service Reference Guide, dc5750 437963-001 D-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 168
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 switch is not functional. Computer will not respond to USB keyboard or mouse. - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 169
application or consult the documentation that came with the application for suggestions on how to improve performance by adjusting parameters in the application. 2. Add more memory. 3. Upgrade the graphics solution. Restart the computer. Service Reference Guide, dc5750 437963-001 D-3 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 170
Troubleshooting Without Diagnostics Solving Minor Problems (Continued) Problem Cause Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. Beeps continue for five iterations after which the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 171
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 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 172
Troubleshooting Without Diagnostics Solving Power Supply Problems (Continued) Problem Cause Solution Power LED flashes Red, four times, once every second, followed by a two second pause, and the computer beeps four times. Beeps continue for five iterations after which the LED flashes will - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 173
Computer Setup. Diskette is damaged. Invalid media reported. Disk may be write-protected. Solution In Microsoft Windows XP, right-click Start, click Explore, and select a drive. Select File > Properties > Tools. Under Error-checking, click Check Now. Remove diskette and reinsert. Reconnect power - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 174
in Storage > Storage Options > Removable Media Boot. ✎ Both steps should be used as the Removable Media Boot function overrides the Boot Order enable command. Run Computer Setup and disable Network Server Mode in Security > Password Options. D-8 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 175
delay under Advanced > Power-On. Run Computer Setup and ensure the device's SATA port is enabled in Storage > Storage Options. Run Computer Setup and increase the POST Delay in Advanced > Power-On Options. Remove the diskette from the diskette drive. Service Reference Guide, dc5750 437963-001 D-9 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 176
Storage > Storage Options. Run the Computer Setup utility and change boot sequence in Storage > Boot Order. Run the Computer Setup utility and change the "Emulation Type" to "Hard Disk" in the device's details under Storage > Device Configuration. D-10 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 177
to turn off the power. To restart the computer, press the power button. Solving Media Card Reader Problems Solving Media Card Reader Problems Problem Cause Media card will not work in a digital camera after formatting it in Microsoft Windows XP. By default, Windows XP will format any media - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 178
USB port on the media card reader. The media card reader is connected to the computer via the PCI card, which is not supported on the HP Desktop BIOS. After installing the media card reader, the front USB ports on the computer do not work. The USB cable for the front USB ports was disconnected so - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 179
corrupted; system is running in Boot Block Emergency Recovery Mode (indicated by eight red blinks from the power LED and eight simultaneous beeps). Fixed-sync monitor will not sync at the resolution chosen. Computer is in standby mode. Monitor cable plugged into the wrong connector. Solution Turn - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 180
and press Enter. 3. In Windows Control Panel, double-click the Display icon and select the Settings tab. 4. Use the sliding control to reset the resolution. The integrated graphics can be enabled in Computer Setup if a standard PCI graphics card is installed. 1. Reseat DIMMs. Power on the system - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 181
Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem Cause Blank screen and the power LED flashes Red seven times, once every second, followed by a two second pause, and the computer beeps seven times. Beeps continue for five iterations after which the LED flashes - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 182
a SoftPaq that will assist you with the synchronization, go to the following Web site, select the appropriate monitor, and download either SP32347 or SP32202: http://www.hp.com/support 1. Reseat the graphics card. 2. Replace the graphics card. D-16 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 183
or headphones. Software volume control is turned down. Audio is hidden in Computer Setup. The external speakers are not turned on. Solution Shut down all open processor-intensive applications. In Windows XP: 1. From the Control Panel, select Sounds and Audio Devices. 2. On the Audio tab, select - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 184
speakers, if connected, or disconnect headphones or external speakers. 1. From the Control Panel program, click Sound, Speech and Audio Devices, then click Sounds and Audio Devices. 2. Click the Mute check box to remove the check mark from the box. D-18 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 185
Computer appears to be locked up while recording audio. Headphones are plugged into the rear audio output connector. The rear audio connector is for powered audio works, reload the printer driver. Make the proper network connections to the printer. Service Reference Guide, dc5750 437963-001 D-19 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 186
Shut down the computer using the mouse and then restart the computer. See the Worldwide Limited Warranty for terms and conditions. 1. Check software, if available, for device status. 2. Check/replace device batteries. 3. Reset receiver and keyboard. D-20 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 187
Troubleshooting Without Diagnostics Solving Keyboard and Mouse Problems (Continued) Problem Cause Solution Computer is in standby mode. Press the power button to resume from standby mode. Ä When attempting to resume from standby mode, do not hold down the power button for more than four - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 188
not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data. Remove roller ball cover from the bottom of the mouse and clean the internal components with a mouse cleaning kit. D-22 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 189
and play device, you must reconfigure the computer after completing installation of the new hardware. In Windows XP, use the Add Hardware Wizard and follow the instructions that appear on the screen. Å WARNING: When the computer is plugged into an AC power source, voltage is always applied to the - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 190
start. Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. Beeps continue for five iterations after which the LED flashes will continue until the problem is resolved. Wrong memory modules were used in the upgrade or memory modules - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 191
status. 1. Run Computer Setup and enable network controller. 2. Enable the network controller in the operating system via Device Manager. Reinstall network drivers. Disable auto-sensing capabilities and force the system into the correct operating mode. Service Reference Guide, dc5750 437963-001 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 192
the computer does not communicate with the network. The cable is attached to the incorrect connector. There is a problem with the cable or a device at the other end of the cable. Network controller interrupt is shared with an expansion board. The network controller is defective. Network drivers are - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 193
Troubleshooting Without Diagnostics Solving Network Problems (Continued) Problem Cause Network controller stops working without apparent cause. (continued) The network controller Server contains the NIC drivers for your NIC. Flash the ROM. Service Reference Guide, dc5750 437963-001 D-27 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 194
memory requirements for the application or add more memory to the computer. 1. Reseat DIMMs. Power on the system. 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. D-28 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 195
Troubleshooting Without Diagnostics Solving Processor Problems . Solving Processor Problems Problem Cause Poor performance is experienced. Processor is hot. Power LED flashes Red three times, once every second, followed by a two second pause, and the computer beeps three times. Beeps continue - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 196
-On. Run the Computer Setup utility and ensure the device's SATA port is enabled in Storage > Storage Options. Run Computer Setup and increase the POST Delay in Advanced > Power-On Options. See the documentation that came with the optional device. D-30 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 197
manufacturers. USDT computer boots too slowly after removing a CD-ROM or DVD drive. The system is searching for the drive during boot because the drive cable is still attached to the system board. Disconnect the drive cable from the system board. Service Reference Guide, dc5750 437963-001 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 198
Troubleshooting Without Diagnostics Solving Drive Key Problems Solving Drive Key Problems Problem Cause Drive Key is not seen as a drive letter in Windows XP Drive Key in Windows XP. Run the Computer Setup utility and Supported USB Flash Media Device" section of the Service Reference Guide - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 199
driver for the device. 2. You might need to reboot the computer. The cable from the device to the computer does not work. 1. If possible, replace the cable. 2. Restart the computer. The device is not working. 1. Replace the device. 2. Restart the computer. Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 200
On the General tab, click the Delete Cookies button. Windows 2000 1. Select Start > Settings > Control Panel. 2. Double-click Internet Options. 3. On the General tab, click the Delete Cookies button. Log on to the ISP and launch the desired program. D-34 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 201
Troubleshooting Without Diagnostics Solving Internet Access Problems (Continued) Problem Cause Solution Internet takes too long to download Web sites. Modem is not set up properly. Verify that the correct modem speed and COM port are selected. For Windows XP 1. Select Start > Control Panel. - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 202
recovery diskette to scan hard drive for errors. Verify that the software is certified by Microsoft for your version of Windows (see program packaging for this information). If possible, save all data, close all programs, and restart the computer. D-36 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 203
= Port A J53 Parallel port over single Serial Port J54 Parallel port over Serial Port and Video Port J55 Parallel port over dual VGA ports J65 DVI connector J66 Keyboard connector, PS/2 (Closest to power supply) J67 Mouse connector, PS/2 Service Reference Guide, dc5750 437963-001 E-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 204
VRM module footprint AUI connector Fan command/fan sink header (may be 2 or 4 pin) Digital audio expansion header SPDIF internal input header SPDIF internal output header Primary IDE connector Secondary IDE/MultiBay connector Header for NEWCARD E-2 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 205
for front panel audio Header for front panel USB Internal PC graphics connector (outboard) Blade PC graphics (CPU) fan header for fansink Secondary CPU fan CMOS switch/push button Single chip solution (combined northbridge/southbridge) North bridge South bridge Super I/O Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 206
transceiver VRM controller USB front port power switch First USB rear port power switch Second USB rear port power switch Third USB rear port power switch Battery retainer Memory slot. DIMM1 Secondary NIC clock crystal RTC clock crystal/tie-down E-4 437963-001 Service Reference Guide, dc5750 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 207
F Memory The dc5750 series computers with AMD-based processors come with double data rate 2 synchronous dynamic random access memory (DDR2-SDRAM) dual inline memory modules (DIMMs). Ä CAUTION: DDR and DDR2 memory modules are not interchangeable. DDR2-SDRAM DIMMs The memory sockets on the system - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 208
operate in single channel mode, dual channel mode, or flex mode, dual channel mode if the total memory capacity of the DIMMs in Channel A is equal to the total memory memory describes the total amount of memory assigned to dual channel configuration, 2 GB will run as dual channel and 256 MB will run - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 209
menu 2-5 configuration settings, recovering 2-14 configuring power button 3-14 connections MT system board 6-9 SFF system board 7-7 connector pin assignments A-1 to A-10 country-specific power cord set requirements B-2 cover lock, smart 3-23 Service Reference Guide, dc5750 437963-001 Index-1 - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 210
display problems D-2 DDR2 memory F-1 deleting password 3-20 delimiter characters, table 3-21 device drivers, installing 1-1 diagnostic tool for hard drives 3-25 diagnostics utility 2-14 to 2-18 DIMMs F-1 disassembly preparation MT 5-1, 6-1 SFF 7-1 diskette drive MT removal and replacement 6-16 SFF - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 211
assignments A-4 locking Smart Cover Lock 3-24 M memory DDR2 specifications F-1 MT removal and replacement 6-10 problem solving D-28 SFF removal and replacement 7-17 socket assignments F-2 microphone pin assignments A-3 Microtower See MT monitor blank screen D-13 blurry video D-15 cleaning 5-7 dim - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 212
20 media card reader D-11 memory D-28 mouse D-20 network D-25 optical drives D-30 power supply D-5 printer D-19 processor D-29 software D-36 Wake-on-LAN D-25 processor MT removal and replacement 6-29 problem solving D-29 SFF removal and replacement 7-29 protecting ROM BIOS 3-7 PXE (Preboot Execution - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 213
3-5 MT external 6-2 to 6-3 password 3-18 SFF external 7-2 security features overview 3-16 serial interface pin assignments A-3 service considerations 5-7 setup password changing 3-20 deleting 3-20 entering 3-19 setting 3-18 setup, Windows 1-1 SFF access panel removal and replacement 7-3 battery - Compaq dc5750 | HP Compaq dc5750 Business PC Service Reference Guide, 1st Editio - Page 214
-tolerant power supply 3-25 system board MT removal and replacement 6-33 reference designators E-1 SATA connectors 4-1 SFF removal and replacement 7-31 T tamper-proof screws,tool 5-7 temperature control 5-5 thermal sensor 3-25 tools, servicing 5-7 Torx T-15 screwdriver 5-7 troubleshooting D-1 to
service reference guide
HP Compaq dc5750 Business PC
1st Edition
x
This document provides information on the removal and replacement of all
parts as well as information on troubleshooting, Desktop Management, setup
utilities, SATA drives, safety, routine care, connector pin assignments, POST
error messages, and diagnostic indicator lights.
Document Part Number 437963-001