Illustrated Parts & Service Map

HP Compaq dc7900 Small Form Factor

Business PC

©

2008, 2009 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. HP shall not be liable for technical or editorial errors or omissions contained herein. Intel, Pentium,

Intel Inside, and the Intel logo are trademarks or registered trademarks of the

Intel Corporation and its subsidiaries in the U. S. and other countries.

Document Number 506594-002. 2nd Edition March 2009.

Key Specifications

Processor Type

RAM Type

Intel Celeron, Pentium Dual-Core, Core2 Duo, Core2 Quad

DDR2-SDRAM DIMMs, PC2-6400 (800 MHz) non-ECC

Maximum RAM Supported 8 GB

Expansion Slots • 2 PCIe-x16

• 1 PCIe-x1

• 1 PCI (low profile)

• Optional full-height riser board

Graphics Adapter

Drive Support

I/O Interfaces

Integrated Intel GMA 3200 graphics

• 2 hard drives

• 1 optical drive

• RAID 1 Support

• floppy diskette drive, media card reader, removable hard disk drive, solid state drive

USB 2.0 (8), USB 2.0, internal on system board (2), eSATA

(optional), parallel (optional), serial (optional), RJ-45, front and rear audio jacks (2 each), PS/2 ports (2), VGA connector

Spare Parts

System Unit

1 Access panel

2 Front bezel

3 Power supply, 240W

3 Power supply, 240W, 85% efficient

* Bezel blank, 5.25-inch

* Tower stand

* Not shown

Cables

1 Front I/O with USB and audio cables

2 Power/LED cable assembly

3 SATA ODD cable, 25 inch, 1 straight, 1 angled end

4 17.7-inch SATA cable, 2 straight ends

* Second serial port, LP

* LED holder

* DMS-59 to dual VGA cable

* Adapter, DVI to VGA

* Diskette drive cable, 11 inch

*Not shown

460895-001

460896-001

461535-001

453317-001

392414-001

460896-001

463023-001

202997-001

499200-001

460893-001

451148-001

460888-001

462435-001

335937-001

451150-001

Keyboards (not illustrated)

PS/2, Basic

USB, Basic

USB SmartCard

Arabic

Belgian

BHCSY

Brazilian Portuguese

Czech

Danish

Finnish

French

French Canadian

German

Greek

Hebrew

Hungarian

International

International English

Italian

Japanese

*For 435385-xxx only

-121

-041

-151

-BB1

-211

-B31

-L31

-061

-291

-221

-081

-351

-051

-171

-181

-B41

-201

435302-xxx

435382-xxx

435385-xxx

LA Spanish

Norwegian

People’s Republic of China

Portuguese

Romanian

Russian

Saudi Arabia*

Slovakian

South Korea

Spanish

Swedish

Swiss

Taiwanese

Thai

Turkish

U.S.

U.K.

-KD1

-071

-101

-111

-AB1

-281

-141

-001

-031

-161

-091

-AA1

-131

-271

-251

-DE1

-231

Mass Storage Devices (not illustrated)

Diskette drive with bezel

Media card reader, 5.25-inch

Media card reader, 3.5-inch

16X SATA DVD±RW and CD-RW drive with LightScribe

16X SATA DVD-ROM drive

500 GB hard drive, 3.5-inch

320 GB hard drive, 3.5-inch

250 GB hard drive, 3.5-inch

160 GB hard drive, 3.5-inch

160 GB, 10000-RPM hard drive, 2.5-inch with adapter

80 GB, 10000-RPM hard drive, 2.5-inch with adapter

80 GB, 10000-RPM hard drive, 2.5-inch with adapter

431452-001

480033-001

507058-001

447310-001

419496-001

504339-001

504338-001

504337-001

504336-001

508312-001

497728-001

508311-001

dc7900 Illustrated Parts & Service Map, SFF Chassis 506594-001 page 1

Standard and Optional Boards

System Boards with thermal grease, alcohol pad, and CPU socket cover

1 System board

1 System board, excludes ES/CS

Memory modules (PC2-6400, CL6)

2

2

2

2

512 MB

1 GB

2 GB

4 GB

462432-001

490630-001

418952-001

418951-001

457624-001

497735-001

Other boards

* ATI HD2400 (RV610) 256-MB graphics card, one DMS559 connector and one S-Video connector, low profile with ATX bracket

462477-001

* ATI HD3470 (RV620) 256-MB graphics card, one DP 1.1a connector, one dual-link DVI connector, includes bracket

483951-001

*

*

*

*

*

*

*

Quadro NVS295 256-MB PCIe graphics card

HP nVidia Quadro NVS 290 256-MB graphics card, includes bracket

NIC, GB, Intel PRO/1000, PCIe, full-height

Broadcom NetXtreme Gbit Ethernet Plus NIC

Modem, PCIe, 56K, Agere International 56K, includes bracket

Modem, PCI, 56K, Agere International

1394 card 2 external, 1 internal port

Intel Celeron Processors with alcohol pad and thermal grease

* 450, 2.2 GHz, 512-KB cache, single core

* 440, 2.0 GHz, 512-KB cache, single core

* E1500, 2.2 GHz, 512-MB cache, dual core

* E1400, 2.0 GHz, 512-MB cache, dual core

* E1200, 1.6 GHz, 512-MB cache, dual core

Intel Pentium Dual Core Processors with alcohol pad and thermal grease

* E5400, 2.7 GHz, 2-MB L2 cache

* E5200, 2.5 GHz, 2-MB L2 cache

519298-001

456137-001

398754-001

488293-001

490689-001

398661-001

441448-001

508256-001

449166-001

516899-001

491574-001

468589-001

531989-001

503382-001

480714-001

465216-001

* E2220, 2.4 GHz, 1-MB L2 cache

* E2200, 2.2 GHz, 1-MB L2 cache

Intel Core 2 Quad Processors with alcohol pad and thermal grease

* Q9650, 3.00 GHz, 12-MB L2 cache

* Q9550, 2.83 GHz, 12-MB L2 cache

* Q9400, 2.66 GHz, 6-MB L2 cache

* Q8300, 2.50 GHz, 4-MB L2 cache

* Q8200, 2.33 GHz, 4-MB L2 cache

Intel Core 2 Duo Processors with alcohol pad and thermal grease

* E8600, 3.33 GHz, 6-MB L2 cache

* E8500, 3.16 GHz, 6-MB L2 cache

* E8400, 3.00 GHz, 6-MB L2 cache

* E8300, 2.83 GHz, 6-MB L2 cache

* E7500, 2.93 GHz, 3-MB L2 cache

* E7400, 2.80 GHz, 3-MB L2 cache

* E7300, 2.66 GHz, 3-MB L2 cache

* E7200, 2.53 GHz, 3-MB L2 cache

* E5300, 2.60 GHz, 2-MB L2 cache

497734-001

465758-001

497733-001

516901-001

503381-001

497732-001

466170-001

509554-001

466168-001

531988-001

508255-001

500134-001

490507-001

516900-001

* Not shown

LP = Low profile

FH = Full height

Miscellaneous Parts

*

*

*

*

*

*

*

*

5

*

3

4

1

2

Fan duct

Printer port

Internal speaker

Chassis fan

Heatsink with alcohol pad and factory-applied thermal grease

Backwall, LP

Backwall, FH

Solenoid lock

USB powered speakers

Mouse, PS2, optical

Mouse, laser

Mouse, optical

Hood sensor

Modem cable

*Not shown

LP = Low profile

FH = Full height

Modem RJ-11 adapters (not illustrated)

Austrian

Belgian

Czechoslovakian

French

German

Greek

Hungarian

Israel

417561-011

316904-181

234963-221

316904-051

316904-045

316904-151

234963-215

316904-BB1

Italian

Netherlands

Polish

Saudi Arabian

Scandinavian

Swiss

Turkish

United Kingdom

316904-065

316920-335

316904-241

316904-AR1

382848-DH1

417562-111

316904-141

158593-035

460892-001

497727-001

394779-001

499199-001

490813-001

497736-001

497737-001

451149-001

466618-001

417966-001

459821-001

390938-001

392417-001

198220-001

dc7900 Illustrated Parts & Service Map, SFF Chassis 506594-001 page 2

System Board

J78

P1

P3

P5

J42

J64

J68

J69

P6

P8

P9

P10

P11

J10

J20

J31

J41

System Board Connectors and Jumpers (position of some untitled components may vary in location)

E49

J9

Password header

Stacked RJ-45/Dual USB

P124

P125

Hood lock connector

Hood sensor connector

Quad stacked USB

PCI slot

PCIe X1 slot

PCIE X16 slot

P126

P150

P151

P23

Flying parallel port header

Media reader connector

ReadyBoost connector

Front audio

PCI Express X4 graphics slot

Display port connector

P24

P52

Stacked keyboard/mouse connector P60

Video connector P61

Double stacked line-out/line-in

Main power connector

CPU power connector

Power button/LED connector

Internal speaker connector

CPU fan connector

Chassis fan connector

Diskette drive connector

Rear fan connector

Front USB

Second serial port

SATA0

SATA1

P62

P64

SATA2

SATA4

SW50 Clear CMOS button

XBT1 Real-time-clock battery socket

XMM1

XMM2

XMM3

XMM4

XU1

DIMM 1

DIMM 2

DIMM 3

DIMM 4

Processor socket

System Setup and Boot

Basic system information regarding system information, setup, power management, hardware, and passwords is maintained in the Setup Utility held in the system ROM. The Setup Utility is accessed by pressing the F10 key when prompted (on screen) to do so during the boot sequence.

If the screen prompt opportunity is missed, a restart will be necessary. For more information about Setup Utilities refer to the Service Reference Guide.

Computer Setup Menu

Heading Option/Description

File System Information - Lists the following main system specifications:

•

•

•

•

•

Product name

SKU number (some models)

Processor type/speed/stepping

Cache size (L1/L2)

Memory size/speed/channels

• Integrated MAC Address

• System BIOS

• Chassis serial number

• Asset tracking number

• ME firmware version

• Management node

About - Displays copyright notice.

Set Time and Date - Allows you to set system time and date.

Flash System ROM - Allows you to select a drive containing a new BIOS.

Replicated Setup - Save to Rmv Media and Restore from Rmv Media

Default Setup

• Save Current Settings as Default

• Restore Factory Settings as Default

Storage

Apply Defaults and Exit - Applies the selected default settings and clears any established passwords.

Ignore Changes and Exit - Exits Computer setup without saving changes.

Save Changes and Exit - Saves changes to system configuration or default settings and exits Computer Setup.

Device Configuration - Lists all installed BIOS-controlled storage devices.

The following options are available:

• Diskette Type(Legacy Diskettes only)-3.5” 1.44 MB and 5.25” 1.2 MB

• Drive Emulation

• Emulation Type - ATAPI Zip drive, hard disk, legacy diskette, CD-ROM drive, and ATAPI LS-120 drive

• Multisector Transfers

• Translation Mode

• Translation Parameters

• SATA Default Values

Storage Options

• Removable Media Boot

• Legacy Diskette Write

• SATA Emulation

• Max eSATA Speed

DPS Self-Test - Allows you to execute self-tests on ATA hard drives.

Boot Order - Allows you to specify boot order.

• Shortcut to Temporarily Override Boot Order

dc7900 Illustrated Parts & Service Map, SFF Chassis 506594-001

Computer Setup Menu (Continued)

Heading Option / Description

Security Setup Password - Allows you to set and enable the setup (Administrator) password.

Power-On Password - Allows you to set and enable power-on password.

Password Options - When any password exists allows you to lock legacy resources, enable/disable network server mode, specify password requirement for warm boot, and allows you to enable/disable Setup Browse Mode.

Smart Cover (some models) - Allows you to lock/unlock cover lock and set status of cover removal sensor.

Device Security (some models) - Enables/disables all I/O ports, audio, network controllers, SMBus controller, and embedded security devices.

USB Security - Allows you to set Device Available/Device Hidden for front

USB ports 3-6, rear USB ports 7-12, internal USB ports 1-2.

Network Service Boot - Enables/disables boot from OS on a server.

Power

Advanced

System IDs - Allows you to set Asset tag, ownership tag, Chassis serial number, UUID, and keyboard locale setting.

DriveLock Security - Allows you to assign/modify a hard drive password for added security.

System Security (some models) - Allows you to enable/disable:

• Data Execution Prevention

• Virtualization Technology

• Virtualization Technology Directed I/O

• Trusted Execution Technology

• Embedded Security Device Support

• OS management of Embedded Security Device through OS

• Smart Card BIOS Password Support

• PAVP (Protect Audio Video Path) (some models)

Setup Security Level - Provides method to allow users limited access to change specified setup options without knowing Setup password.

OS Power Management - Allows you to enable/disable Runtime Power

Management, Idle Power Savings, ACPI S3 Hard Disk Reset, ACPI S3 PS2

Mouse Wakeup, USB Wake on Device Insertion (some models), Unique

Sleep State Blink Rates.

Hardware Power Management - Allows you to enable/disable SATA bus power management.

Thermal - Allows you to control minimum permitted fan idle speed.

Power-On Options - Allows you to set:

• POST mode - QuickBoot, FullBoot, or FullBoot every 1-30 days.

• POST messages - Enable/disable

• MEBx Setup prompt - Enable/disable or hidden/displayed

• F9 prompt - Enable/disable

• F10 prompt - Enable/disable

• F12 prompt - Enable/disable

• Factory Recovery Boot Support - Enable/disable

• Option ROM prompt - Enable/disable

• WOL After Power Loss - Enable/disable

• Remote wakeup boot source - Remote server/local hard drive

• After Power Loss - Off/on/previous state

• POST delay - None, 5, 10, 15, or 20 seconds

• Limit CPUID Maximum value to 3

Execute Memory Test (some models) -Restarts computer and executes

POST memory test.

BIOS Power-On - Allows you to set the computer to turn on at a preset time.

Onboard Devices - Allows you to set resources or disable onboard system devices.

PCI Devices - Lists installed PCI devices with their IRQ settings and allows you to reconfigure IRQ or disable devices.

PCI VGA Configuration - Allows you to specify which VGA controller will be used when multiple video adapters are available.

Bus Options (some models) - Allows you to enable/disable PCI SERR#

Generation and PCI VGA palette snooping.

Device Options - Allows you to set:

• Printer Mode - Bi-Directional, EPP & ECP, Output Only

• Num Lock state at power-on - off/on

• S5 Wake on LAN - enable/disable

• Processor cache - enable/disable

• Integrated video - enable/disable

• Multi-Processor - enable/disable

• Internal speaker - enable/disable

• Monitor Tracking - enable/disable

• NIC PXE Option ROM Download - enable/disable

Management Devices - Only displayed in Advanced menu when BIOS detects multiple management options.

Management Operations - Allows you to set:

• MEBx Setup Prompt - enable/disable

• Remote Help Prompt - enable/disable

• Remote Help Lockout - enable/disable

• Remote Help Connection Timeout - 5, 10, 15, 20, 30, 40, 50, 60, 120,

180, 240 seconds

• SOL Character Echo - enable/disable

• SOL Terminal Emulation Mode - enable/disable

• SOL Keyboard (enable/disable

System Hardware Interrupts

5

6

3

4

7

1

2

IRQ System Function

0 Timer Interrupt

Keyboard

Interrupt Controller Cascade

Serial Port (COM B)

Serial Port (COM A)

Unused, available for PCI

Diskette Drive

Parallel Port (LPT 1)

11

12

13

14

15

IRQ System Function

8 Real-Time Clock

9

10

Unused

Unused, available for PCI

Unused, available for PCI

Mouse

Coprocessor

Primary ATA (IDE) Controller

Secondary ATA (IDE) Controller

page 3

Failsafe Boot Block ROM

The computer comes with a reprogrammable flash system ROM (read only memory). To upgrade the ROM, download the latest ROM BIOS image from the HP Web site (www.hp.com) and follow the online GUI/instructions.

Your system ROM includes a Failsafe Boot Block that is protected during the flash process and allows the computer to be restarted in the unlikely event of an unsuccessful ROM flash.

If the system detects an invalid system ROM during the boot sequence, the Failsafe Boot Block attempts to locate a valid BIOS image on removable media. To recover from the Boot Block recovery mode complete the following steps:

Boot Block Recovery

1. Remove any bootable media from the computer and turn off power.

2. Insert a flash drive or CD containing the ROM BIOS in the root directory. The media must be formatted using the FAT12, FAT16, or FAT32 file system.

3. Turn on power to the system.

4. The system will automatically flash the ROM.

NOTE: BitLocker prevents Windows Vista from booting when a CD containing the BIOS image file is in an optical drive. If BitLocker is enabled, remove this CD before attempting to boot to

Windows Vista.

Password Security

Establishing a Setup or Power-On password:

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down >Restart.

2. As soon as the computer is turned on, press F10 when the monitor light turns green to enter

Computer Setup. Press Enter to bypass the title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary.

3. To establish a Setup password, select Security > Setup Password and follow the instructions on the screen.

- or -

To establish a Power-On password, select Security > Power-On Password and follow the instructions on the screen

4. Before exiting, click File > Save Changes and Exit.

Changing a Setup or Power-On password:

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

To change the Setup password, go to step 2.

To change the Power-on password, go to step 3.

2. To change the Setup password, as soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary.

3. When the key icon appears, type your current password, a slash (/) or alternate delimiter character, your new password, another slash (/) or alternate delimiter character, and your new password again as shown: current password/new password/new password.

NOTE: Type the new password carefully since the characters do not appear on the screen.

4. Press Enter.

The new password will take effect the next time the computer is restarted.

Deleting a Power-On or Setup password

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

To delete the Setup password, go to step 2.

To delete the Power-On password, go to step 3.

2. To change the Setup password, as soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary.

3. When the key icon appears, type your current password followed by a slash (/) or alternate delimiter character as shown. Example: currentpassword/

4. Press Enter.

Security Features

Diagnostic Functions

Diagnostic functions are provided by the Setup Utility (in system ROM) and by HP Insight

Diagnostics. HP Insight Diagnostics provides detailed system information including:

• Processor type and speed

• Memory amount, mapping, and integrity

• Hardware peripheral availability/settings

• Hard drive type, space used/available

• System identification, asset tracking

Insight Diagnostics may be found on the Documentation and Diagnostics CD that shipped with the computer. The tool may also be downloaded from the HP Web site using the following procedure:

1. Go to www.hp.com

2. Click the Software & Download driver link.

3. Enter the product number (for example, dc7900) in the text box and press the Enter key.

4. Select the specific product.

5. Select the OS.

6. Click the Diagnostics link.

7. Select HP Insight Diagnostics Offline Edition.

8. Click Download.

NOTE: The download includes instructions on how to create a bootable CD.

Clearing CMOS

1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet.

2. Remove the chassis access panel.

3. On the system board, press and hold the CMOS button for 5 seconds.

4. Replace the chassis access panel and reconnect the power cord.

5. Turn on the computer and allow it to start.

Error Conditions and Messages

Feature Purpose

Floppy drive controller Prevents the transfer of data to or from the floppy drive.

Device Boot Disabling Prevents booting from and or all of these devices: Internal or external USB, Internal

ODD, or Internal FDD

Security Option Prevents use of computer until password is entered. Can apply to both initial startup and restart.

BIOS Write Protect

USB Controller

Restricts ability to change ROM BIOS without approval.

Allows you to disable or enable all USB devices.

How It Is

Established

Setup Utilities

Setup Utilities

Setup Utilities

Setup Utilities.

Setup Utilities

Diagnostic LEDs

LED Color LED Activity

Power Green On

Power Green

Power Red

1 blink every 2 seconds

1 blink every second followed by a 2 second pause

Power Red

Power

Power

Power

Red

Red

Red

3 blinks, 1 blink every second followed by a 2 second pause

4 blinks, 1 blink every second followed by a 2 second pause

5 blinks, 1 blink every second followed by a 2 second pause

6 blinks, 1 blink every second followed by a 2 second pause

Power Red

Power

Power

Power

Power

Red

Red

Red

Red

7 blinks, 1 blink every second followed by a 2 second pause

8 blinks, 1 blink every second followed by a 2 second pause

9 blinks, 1 blink every second followed by a 2 second pause

10 blinks, 1 blink every second followed by a 2 second pause

11 blinks, 1 blink every second followed by a 2 second pause none none System does not power on and

LEDs are not flashing

State/Message

Computer on

Normal Suspend Mode

CPU thermal shutdown

Processor not installed

Power failure (power supply overload)

Pre-video memory error

Pre-video graphics error

System board failure (ROM

Invalid ROM based on Checksum

System powers on but is unable to boot

Bad option card

The current processor does not support a feature previously enabled on this system.

System unable to power on

Common POST Error Messages

Screen Message Probable Cause Recommended Action

101-Option ROM Error

103-System Board

Failure

164-Memory Size Error and

201-Memory Error

214-DIMM Configuration Warning

301-, 304-Keyboard error

1. System ROM checksum error.

2. Expansion board option

ROM checksum

DMA, timers

Incorrect memory configuration

Populated DIMM configuration is not optimized

Keyboard failure.

1. Verify ROM, reflash if required

2. Remove suspected card, reboot

3. Clear CMOS memory, reboot

4. Replace system board

1. Clear CMOS memory.

2. Remove expansion boards.

3. Replace system board.

1. Run Setup (F10).

2. Check DIMMs for proper seating, type, and HP compatibility.

3. Remove DIMMs singularly and reboot to isolate faulty DIMM.

4. Replace system board.

Rearrange the DIMMs so that each channel has the same amount of memory.

Check keyboard connection or keys. Check connector for bent of missing pins. Replace keyboard. If

304, possible system board problem.

501-Display Adapter

Failure

1720-SMART Hard Drive

Detects Imminent Failure

Graphics display controller.

1. Reseat graphics card.

2. Clear CMOS.

3. Check monitor connection.

4. Replace graphics card.

Hard drive is about to fail.

1. Determine if hard drive is giving correct error message.

Enter Computer Setup and run the Drive Protection System test under Storage > DPS Self-

test.

2. Apply hard drive firmware patch if applicable.

3. Back up contents and replace hard drive.

1796-SATA Cabling Error One or more SATA devices are improperly attached. For optimal performance, the

SATA 0 and SATA 1 connectors must be used before

SATA 2 and SATA 3.

1801-Microcode Patch

Error

Processor not supported by

ROM BIOS.

Ensure SATA connectors are used in ascending order. For one device, use SATA 0. For two devices, use SATA 0 and SATA 1.

For three devices, use SATA 0,

SATA1, and SATA 2.

1. Upgrade BIOS to proper version.

2. Change the processor.

dc7900 Illustrated Parts & Service Map, SFF Chassis 506594-001 page 4