Hp Compaq Dx7400 Microtower Pc Service And Maintain

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dx7400 Illustrated Parts & Service Map, MT Chassis 459782-001 page 1

Illustrated Parts & Service Map

HP Compaq dx7400 Microtower

Business PC

© 2007 Hewlett-Packard Development Company, L.P. The information con-

tained herein is subject to change without notice. HP shall not be liable for

technical or editorial errors or omissions contained herein.

Document Number 459782-001. 1st Edition September 2007.

NOTE: The part numbers listed here may not be the most current

information available. See http://partsurfer.hp.com for the most

current spare parts listing.

Key Specifications

Spare Parts

Processor Type Intel Core 2 Duo, Core 2 Quad, Pentium Dual Core, Celeron

RAM Type DDR2-SDRAM DIMMs, PC2-5300 (667 MHz) non-ECC or

PC2-6400 (800 MHz) non-ECC

Maximum RAM Supported 8 GB

Expansion Slots • 1 PCIe-x16

•2 PCIe-x1

•1 PCI

Graphics Adapter Intel Graphics Media Accelerator

Drive Support • SATA (hard drives and optical drives)

• FDD, Media Card Reader

I/O Interfaces Serial (2, 1optional), parallel (1), USB 2.0 (8), RJ-45 (1), audio

jacks (3), PS/2 ports (2), VGA (1)

System Unit

1 Front bezel with bezel blank 438609-001

* Front bezel without bezel blank (for China only) 445366-001

2 Access panel 440197-001

3 Chassis not spared

4 Power supply, PFC, 300W 447584-001

5 Bezel blank, 5.25 inch 335937-001

*Not shown

Cables

1 SATA cable, 13 inch (1 straight end, 1 right angle end)

(use for optical drive 2)

391738-001

2 Diskette drive cable 392288-001

* DMS-59 to dual VGA dongle 339257-001

* SATA cable, 14 inch (2 straight ends) (use for optical drive 1) 391740-001

* Front USB cable 457230-001

* Power switch with cable and switch mounting bracket 416163-001

* Second serial port cable 444656-001

* Modem cable 198220-005

* SATA hard drive cable, 10 inch (2 straight ends) 392307-001

*Not shown

Mass Storage Devices

1 Diskette drive, 3.5-inch, with mounting screws 392415-001

2 48X SATA CD-RW/DVD-ROM drive 419497-001

* 16X SATA DVD±RW and CD-RW drive with LightScribe 447310-001

* 16X SATA DVD-ROM drive 419496-001

3 80 GB, 7200-RPM SATA hard drive, 8-MB cache 449978-001

3 160 GB, 7200-RPM SATA hard drive, 8-MB cache 449979-001

3 250 GB, 7200-RPM SATA hard drive, 8-MB cache 449980-001

*Media card reader 407187-001

*Not shown

Modem RJ-11 adapters (not illustrated)

Australia 417561-011 Italian 316904-061

Belgian 316904-181 Netherlands 316920-331

Czechoslovakian 234963-221 Polish 316904-241

French 316904-051 Saudi Arabian 316904-AR1

German 316904-045 Scandinavian 382848-DH1

Greek 316904-151 Switzerland 417562-111

Hungarian 234963-211 Turkish 316904-141

Israel 316904-BB1 United Kingdom 158593-031

dx7400 Illustrated Parts & Service Map, MT Chassis 459782-001 page 2

Keyboards (not illustrated)

PS/2, Basic

USB, Basic

435302-xxx

435382-xxx

Arabic -171 Korea -

KD1

Belgian -181 Norwegian -091

BHCSY -B41 PRC

-AA1

Czech -221 Portuguese -131

Danish -081 Romanian -271

Finnish -351 Russian -251

French -051 Slovakian -231

French Arabic -DE1 Spanish -071

German -041 Swedish -101

Greek -151 Swiss -111

Hebrew -BB1 Taiwanese -AB1

Hungarian -211 Thai -281

International -B31 Turkish -141

Italian -061 U.K. -031

Japanese -291

Standard and Optional Boards

Memory modules, non-ECC, DDR2

1 256 MB, PC2-5300, CL5 396519-001

1 512 MB, PC2-5300, CL5 396520-001

1 1 GB, PC2-5300, CL5 398038-001

1 2 GB, PC2-5300, CL5 450367-001

1 512 MB, PC2-6400, CL6 418952-001

1 1 GB, PC2-6400, CL6 418951-001

1 2 GB, PC2-6400, CL6 457624-001

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

2 Standard board 447583-001

Intel Celeron Processors with alcohol pad and thermal grease

* 440, 512-KB cache, 2.0 GHz 449166-001

* 430, 512-KB cache, 1.8 GHz 449165-001

* 420, 512-KB cache, 1.8 GHz 449164-001

Intel Pentium Dual Core Processors with alcohol pad and thermal grease

* E2180, 1-MB cache, 2.0 GHz 457656-001

* E2160, 1-MB cache, 1.8 GHz 449168-001

* E2140, 1-MB cache, 1.6 GHz 449167-001

Intel Core 2 Quad Processor with alcohol pad and thermal grease

* Q6600, 8-MB cache, 2.40 GHz 452451-001

Intel Core 2 Duo Processors with alcohol pad and thermal grease

* E6850, 4-MB cache, 3.00 GHz 450792-001

* E6750, 4-MB cache, 2.66 GHz 450791-001

* E6550, 4-MB cache, 2.33 GHz 450694-001

* E6320, 4-MB cache, 1.86 GHz 446040-001

* E4500, 2-MB cache, 1.60 GHz 449452-001

* E4400, 2-MB cache, 2.00 GHz 449451-001

Other boards

* 802.11 Wireless LAN adapter 391866-001

* Standard 1394 PCI card with 2 external and 1 internal port 393308-001

* Gigabit NIC, PCI-E card 398754-001

* Agere International 56K Modem, FH 398661-001

* nVidia QUADRO video card 441280-001

* nVidia GeForce 8440 GS 256-MB video card with dual-link DVI-I and

TV (S-Video) outputs. LP

445743-001

* nVidia GeForce 8440 GS 256-MB video card with DMS59 and TV

(S-Video) outputs. LP

445744-001

* DVI-D ADD2 graphics 398333-001

* ReadyBoost module, 1 GB 455971-001

* Not shown

Miscellaneous Parts

1 Chassis fan with mounting screws 438741-001

2 Heatsink with alcohol pad and factory-applied thermal grease 441391-001

3 Internal speaker 438607-001

*Mouse, PS2, optical 417966-001

* Mouse, PS2, scroll type 390937-001

* Mouse, optical 390938-001

* Battery, real-time clock 153099-001

*Foot (4 ea) 370708-001

*DVI-I to VGA adapter 202997-001

Miscellaneous hardware kit, includes: 410717-001

* 3.5-inch diskette drive bezel (414218-001)

* 3.5-inch bezel blank (414219-001)

* 5.25-inch bezel blank (166775-004)

* #6-32 x .187 Taptite, hitop screw with serrations (6 ea) (192308-003)

* #6-32 x .187 Taptite, hitop screw with serrations (6 ea) (192308-001)

* #6-32 x .250 Taptite, hitop screw with captive flat washer (2 ea) (114399-067)

* M3 x 5mm Taptite hitop screw with serrations (4 ea) (247348-001)

* M5 x 12mm Plastite screw with flat, countersunk head (247481-002)

*Not shown

dx7400 Illustrated Parts & Service Map, MT Chassis 459782-001 page 3

System Board

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.

System Board Connectors and Jumpers (position of some untitled components

may vary in location)

JCOM2 Second serial port connector P24 Front I/O USB connector

J20 PCI slot P61 First SATA connector

J31 PCI Express Slot 1 P62 Second SATA connector

J32 PCI Express Slot 2 P63 Third SATA connector

J41 x16 PCI Express slot for graphics P64 Fourth SATA connector

P1 Power supply connector (24-pin) P150 Media card reader

P3 Power supply connector (4-pin) SW50 Clear CMOS switch

P5 Power switch/LED connector XBT1 Battery

P6 Speaker connector DIMM A1 Memory slot

P8 Heatsink fan DIMM A2 Memory slot

P9 Chassis fan DIMM B1 Memory slot

P10 Floppy drive connector DIMM B2 Memory slot

P23 Front audio connector XU1 Primary processor socket

Computer Setup Menu

Heading Option / Description

System

Information

Lists the following main system specifications:

• Product Name

• SKU Number

• Processor Type

• Processor Speed

• System ROM

• Cache Size

• Memory Size

• Integrated MAC

• UUID

• System Serial #

• Asset Tracking Number

Main Date

(mm/dd/yyyy)

Allows you to set system date.

Time

(hh/mm/ss)

Allows you to set system time.

SATA Port 1,

2, 3, and 4

Allows you to run HDD self-tests, auto detect HDD size and

head, set extended IDE drive details, set access mode, and

view information about the device(s)

Onboard FDC

Controller

Disable/enable

Drive A Allows you to set to None or 1.4M, 3.5 in.

Halt On Allows you to set POST error behavior to: all errors, no

errors, all but keyboard, all but diskette, or all but diskette/

keyboard.

POST Delay Allows you to set POST delay to 0, 5, 10, 15, or 30 seconds

Advanced Execute Dis-

able Bit

Disable/enable hardware DEP function.

MAX DVMT

Allocation

Specify size of DVMT/system memory to allocate for video

memory. Settings: 64MB, 128MB, 224 MB.

Init Display

First

Allows you to set primary display device to PCI slot, OnChip

VGA, or PCIEx.

Onboard HD

Audio

Disable/enable

OnChip USB

Controller

Disable/enable

USB Legacy

Support

Disable/enable (USB keyboard, mouse, and flash media).

Onboard LAN Disable/enable

Onboard LAN

Boot ROM

Disable/enable

Onboard

Serial Port 1

or 2

Allows you to select: Disabled, 3F8/IRQ4, 2F8/IRQ3, 3E8/

IRQ4, or 2E8/IRQ3.

Onboard Par-

allel Port

Allows you to select: Disabled, 378/IRQ7, 278/IRQ5, or

3BC/IRQ7.

Computer Setup Menu (Continued)

Heading Option / Description

Advanced

(continued)

Parallel Port

Mode

Allows you to select: SPP, EPP, ECP, ECP + EPP, or Normal.

After AC

Power Loss

Allows you to select power loss behavior to On, Off, or Last

state.

Wake on PCI

Device from

S5

Disable/enable

RTC Alarm

Resume

Disable/enable

Date (of

Month)

If RTC Alarm is enabled, allows you to select day of month to

resumption (0 = every day).

Resume Time

(hh:mm:ss)

If RTC Alarm enabled, allows you to select time to resume.

Boot Device Boot

Disabling

Allows you to restrict a device from booting the unit. May

disable: none, USB, Internal ODD, Internal FDD, or

USB+ODD+FDD

F9 Boot Menu Disable/enable

F10 Setup

Prompting

Disable/enable

F11 Recovery

Prompting

Disable/enable

F12 Boot

from LAN

Prompting

Disable/enable

Removable

Device Boot

Seq.

Allows you to specify the order of attached removable

devices. The first drive in the order has priority and is recog-

nized as drive A.

Hard Disk

Boot Priority

Allows you to specify the order of attached hard drive devices

(USB HDD, USB2 Drive Key, or USB flash media). The first

attached drive in the order has priority and is recognized as

drive C.

Optical Drive

Boot Seq.

Allows you to specify the order in which attached optical

drives (including USB ODD) are checked for a bootable oper-

ating system image.

Network Boot

Seq.

Allows you to specify the order in which network devices

(including UP NIC cards) are checked for a bootable operat-

ing system image.

First, Second,

Third, and

Fourth Boot

Device

Allows you to specify which devices will boot in which

sequence or to disable any of the four: removable, hard disk,

CDROM, network, or disabled.

Set Supervisor

Password

Allows you to establish a password to enter Computer Setup

Set User Pass-

word

Allows you to establish a password to enter the computer

(must have Supervisor password established)

Security

Option

Allows you to set security option to Setup or System so that

the password is required each time the system boots or only

when entering Computer Setup.

BIOS Write

Protection

Enable to prevent BIOS from being updated.

PC Health System Fan

Fail Check

Disable/enable

Smart Fan

Function

Disable/enable

Current CPU

Temperature

View only

Current Sys-

tem Temp

View only

Current CPU

Fan Speed

View only

Current Sys-

tem Fan

Speed

View only

Vcore View only

12V View only

5V View only

VBAT (V) View only

5VSB (V) View only

Exit Save & Exit

Setup

Allows you to save current settings and exit Computer Setup.

Exit Without

Saving

Allows you to exit Computer Setup without saving changes.

Load Opti-

mized defaults

Allows you to reset Computer Setup to factory defaults.

System Hardware Interrupts

IRQ System Function IRQ System Function

0 Timer Interrupt 8 Real-Time Clock

1 Keyboard 9 Unused

2 Interrupt Controller Cascade 10 Unused, available for PCI

3 Serial Port (COM B) 11 Unused, available for PCI

4 Serial Port (COM A) 12 Mouse

5 Unused, available for PCI 13 Coprocessor

6 Diskette Drive 14 Primary ATA (IDE) Controller

7 Parallel Port (LPT 1) 15 Secondary ATA (IDE) Controller

dx7400 Illustrated Parts & Service Map, MT Chassis 459782-001 page 4

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.

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.

Password Security

Establishing a Supervisor 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 Boot > Setup Supervisor Password and follow the instructions on the screen.

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

Establishing a User 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 Boot > Set User Password and follow the instructions on the screen.

Before exiting, click File > Save and Exit Setup.

Changing a 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.

3. When the key icon appears, type your current password

4. Select Boot > Set Supervisor (or user) Password.

5. Enter the new password (or nothing for no password) in the key icon and 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.

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

Computer Setup.

3. When the key icon appears, type your current password

4. Select Boot > Set Supervisor (or user) Password.

5. Enter nothing for no password in the key icon and press Enter.

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

Clearing CMOS

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

outlet, and remove the access panel.

2. Locate, press, and hold the CMOS button in for five seconds.

3. Replace the access panel and connect the power cord to the power outlet.

4. Turn on the computer.

Error Conditions and Messages

Diagnostic Functions

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

nostics. 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 pro-

cedure:

1. Go to www.hp.com

2. Click the Software and Download driver link.

3. Enter the product number (for example, dx7400) 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.

Feature Purpose

How It Is

Established

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

floppy drive.

Setup Utilities

Device Boot Disabling Prevents booting from and or all of these

devices: Internal or external USB, Internal

ODD, or Internal FDD

Setup Utilities

Security Option Prevents use of computer until password is

entered. Can apply to both initial startup and

restart.

Setup Utilities

BIOS Write Protect Restricts ability to change ROM BIOS with-

out approval.

Setup Utilities

USB Controller Allows you to disable or enable all USB

devices.

Setup Utilities

Common POST Error Messages

Screen Message Probable Cause Recommended Action

101-Option ROM Check-

sum Error

1. System ROM checksum

error.

2. Expansion board option

ROM checksum

3. System board

1. Verify ROM, reflash if required

2. Remove suspected card, reboot

3. Clear CMOS memory, reboot

4. Replace system board

103-System Board

Failure

DMA, timers 1. Clear CMOS memory.

2. Remove expansion boards.

3. Replace system board.

164-Memory Size Error

and

201-Memory Error

Incorrect memory configu-

ration

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 Configura-

tion Warning

Populated DIMM configura-

tion is not optimized

Rearrange the DIMMs so that

each channel has the same amount

of memory.

301-, 304-Keyboard error Keyboard failure. Check keyboard connection or

keys. Check connector for bent of

missing pins. Replace keyboard. If

304, possible system board prob-

lem.

501-Display Adapter

Failure

Graphics display controller. 1. Reseat graphics card.

2. Clear CMOS.

3. Check monitor connection.

4. Replace graphics card.

1720-SMART Hard Drive

Detects Imminent Failure

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 con-

nectors must be used before

SATA 2 and SATA 3.

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.

1801-Microcode Patch

Error

Processor not supported by

ROM BIOS.

1. Upgrade BIOS to proper

version.

2. Change the processor.

Diagnostic LEDs

LED Color LED Activity State/Message

Power Green On Computer on

Power Green 1 blink every second Processor thermal protection activated,

fan blocked or not turning, OR

Fansink not properly attached

Power Green 2 blinks every second Suspend to RAM (some Models)

Power Green 5 blinks, 1 blink every second

followed by 1 short beep

Pre-video memory error

Power Green 6 blinks, 1 blink every second

followed by a 1 long and 2

short beeps

Pre-video graphics error

Power Green 8 blinks, 1 blink every second

followed by 2 short beeps

Invalid ROM with diskette drive

Power Green 8 blinks, 1 blink every second

followed by 2 short beeps and

hurried beeps

Invalid ROM without diskette drive

None None System does not power on and

LEDs are not flashing

System unable to power on