Illustrated Parts & Service Map

HP Compaq dc7800 Ultra Slim Desktop

Business PC

©

2007 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 459787-001. 1st Edition September 2007.

Cable and accessory

1 Optical drive cable/connector

2 Cable cover

Key Specifications

Processor Type

RAM Type

Intel Core 2 Duo, Pentium dual-core, Celeron

DDR2-SODIMMs, PC2 6400 (800 MHz) non-ECC

Maximum RAM Supported 4 GB

Expansion Slots PCI Express Mini Card

Graphics Adapter

Drive Support

I/O Interfaces

Intel GMA 3100 integrated

• 1 SATA mobile 2.5-inch

• 1 PATA Slimline optical

USB 2.0 (8), RJ-45 (1), front and rear audio jacks (2 each),

PS/2 ports (2), VGA/DVI-D connector, USB header on system board

Keyboards (not illustrated)

PS/2, Basic

USB, Basic

USB SmartCard

Arabic

Belgian

BHCSY

Brazilian Portuguese

Czech

Danish

Finnish

French

French Arabic

French Canadian

German

Greek

Hebrew

Hungarian

International

Italian

Japanese

* not for 435385-xxx

-DE1

-121

-041

-151

-BB1

-211

-B31

-061

-291

-221

-081

-351

-051

-171

-181

-B41

-201

435302-xxx

435382-xxx

435385-xxx

Korean (Hangul)

LA Spanish

Norwegian

PRC

Portuguese

Romanian*

Russian

Slovakian

Spanish

Swedish

Swiss

Taiwanese

Thai

Turkish

U.S.

U.K.

Spare Parts

Mass Storage Devices (not illustrated)

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

16X DVD-ROM drive

24X CD-RW/DVD-ROM combo drive

160 GB, 7200 RPM SATA hard drive, 8-MB cache

80 GB, 7200 RPM SATA hard drive, 8-MB cache

80 GB, 5400 RPM SATA hard drive, 8-MB cache

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

System Unit

1 Front bezel

2 Access panel

3 Chassis

4 Stand

5 Bezel blank

6 AC adapter, 135W

* Not shown

451388-001

451387-001 not spared

451396-001

451394-001

437796-001

451393-001

451397-001

417182-001

417185-001

417184-001

456574-001

456573-001

449981-001

316904-065

316920-335

316904-241

316904-AR1

382848-DH1

417562-111

316904-141

158593-035

-071

-101

-111

-AB1

-281

-141

-001

-031

-131

-271

-251

-231

-KD1

-161

-091

-AA1

dc7800 Illustrated Parts & Service Map, USDT Chassis 459787-001 page 1

Standard and Optional Boards

Memory modules (SODIMM)

1 2 GB, PC2-6400 CL6

1 1 GB, PC2-6400 CL6

1 512 GB, PC2-6400 CL6

1 2 GB, PC2-5300

1 1 GB, PC2-5300

1 512 GB, PC2-5300

Wireless cards (include card, antenna, cable, and screw)

2 WLAN adapter kit for use in the United States

* WLAN adapter kit for use in the rest of the world

* WLAN adapter kit for use in Japan

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

3 System board

* System board, excludes ES/CS

Intel Celeron Processors with alcohol pad and thermal grease

* 440, 512-KB cache, 2.0 GHz

* 430, 512-KB cache, 1.8 GHz

* 420, 512-KB cache, 1.8 GHz

Intel Pentium Dual Core Processors with alcohol pad and thermal grease

* E2180, 1-MB cache, 2.0 GHz

* E2160, 1-MB cache, 1.8 GHz

Intel Core 2 Duo Processors with alcohol pad and thermal grease

* E6850, 4-MB cache, 3.00 GHz

* E6750, 4-MB cache, 2.66 GHz

* E6550, 4-MB cache, 2.33 GHz

* E4500, 2-MB cache, 2.2 GHz

* E4400, 2-MB cache, 2.00 GHz

Misc boards

* ReadyBoost module, 1 GB

* Not shown

449166-001

449165-001

449164-001

457656-001

457622-001

450792-001

450791-001

450694-001

449452-001

449451-001

455971-001

451400-001

451398-001

451399-001

445936-001

445935-001

445934-001

455756-001

455756-002

455756-291

437794-001

451384-001

Miscellaneous Parts

*

*

5

6

3

4

1

2

*

*

*

*

Hard drive bracket

Optical drive bracket

Front I/O panel bracket

Fansink with alcohol pad and factory-applied thermal grease

Fan duct

Chassis fan

Mouse, PS2, optical

Mouse, optical

Battery, real-time clock

Internal speaker

Rubber feet, snap in

Hood sensor

*Not shown

451389-001

451390-001

451391-001

451395-001

451392-001

451385-001

417966-001

390938-001

153099-001

447085-001

451386-001

394064-001

dc7800 Illustrated Parts & Service Map, USDT Chassis 459787-001 page 2

System Board

J68

J69

J70

J71

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

E49

J10

Password

Quad stacked USB

P125

P150

Hood sensor

Media reader/ReadyBoost connector

Stacked keyboard/mouse connector P21

Video connector

Primary single USB port

Secondary single USB port

P6

P60

P8

Secondary IDE connector

Internal speaker

SATA0

CPU fan

J72

J75

Microphone jack

Headphone jack

J78 Double stacked line-out/line-in

J100 DVI connector

J103 DC power input

J105 PCIe Mini Card

J9 Stacked RJ-45/Dual USB

P9

SW50

SW1

XBT1

XMM1

XMM3

XU1

Chassis fan

Clear CMOS

System front power button

Real-time-clock battery

DIMM 1

DIMM 3

Processor

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.

Computer Setup Menu

Heading

File

Storage

Option/Description

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/ no. channels

• Integrated MAC Address

• System BIOS

• Chassis serial number

• Asset tracking number

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 Removable Media and Restore from Removable

Media

Default Setup

• Save Current Settings as Default

• Restore Factory Settings as Default

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

Ignore Changes and Exit - Exits Computer setup without applying or saving any 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

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

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.

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

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

Power

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

• Virtual Appliance options

• Smart Card BIOS Password Support

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.

Advanced

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

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

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)

IRQ System Function

8 Real-Time Clock

9

10

11

12

13

14

15

Unused

Unused, available for PCI

Unused, available for PCI

Mouse

Coprocessor

Primary ATA (IDE) Controller

Secondary ATA (IDE) Controller

dc7800 Illustrated Parts & Service Map, USDT Chassis 459787-001 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. After a successful flash, the system will either automatically restart or prompt the user to unplug the unit, wait 5 seconds, reattach the power cord, and then press the power button.

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 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. Select Security > Setup Password and follow the instructions on the screen.

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

Changing a 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 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

NOTE: For more information about Setup Utilities refer to the Computer Setup Menu on the previous page or in the Service Reference Guide.

Diagnostic Functions

Diagnostic functions are provided by the Setup Utility (in system ROM) and by Insight Diagnostics. 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, dc7800) 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. Select the proper language and 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

Power Green

Power Red

Power

Power

Red

Red

On

1 blink every 2 seconds

1 blink every second followed by a 2 second pause

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

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

Power

Power

Power

Power

Power

Power

Power none

Red

Red

Red

Red

Red

Red

Red none

State/Message

Computer on

Normal Suspend Mode

CPU thermal shutdown

Processor not installed

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

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

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

System does not power on and

LEDs are not flashing

Power failure (power supply overload)

OR on USDT the wrong external power supply is being used.

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

101-Option ROM Error

103-System Board

Failure

1. System ROM checksum error.

2. Expansion board option

ROM checksum

3. System board

DMA, timers

Recommended Action

1. Verify ROM, reflash if required

2. Remove suspected card, reboot

3. Clear CMOS memory, reboot

4. Replace system board

164-Memory Size Error and

201-Memory Error

Incorrect memory configuration

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.

214-DIMM Configuration Warning

301-, 304-Keyboard error

501-Display Adapter

Failure

1720-SMART Hard Drive

Detects Imminent Failure

Populated DIMM configuration is not optimized

Keyboard failure.

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.

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.

dc7800 Illustrated Parts & Service Map, USDT Chassis 459787-001 page 4