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
