Hp Compaq Dx7400 Microtower Pc Service And Maintain

2015-01-05

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Illustrated Parts & Service Map
HP Compaq dx7400 Microtower
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.
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.

Cables
1

SATA cable, 13 inch (1 straight end, 1 right angle end)
(use for optical drive 2)

391738-001

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

Key Specifications
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

•
•

I/O Interfaces

Serial (2, 1optional), parallel (1), USB 2.0 (8), RJ-45 (1), audio
jacks (3), PS/2 ports (2), VGA (1)

SATA (hard drives and optical drives)
FDD, Media Card Reader

Spare Parts

Mass Storage Devices
1

Diskette drive, 3.5-inch, with mounting screws

392415-001

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

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

449978-001

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

449979-001

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

438609-001

Czechoslovakian

234963-221

Polish

316904-241

445366-001

French

316904-051

Saudi Arabian

316904-AR1

440197-001

German

316904-045

Scandinavian

382848-DH1

316904-151

Switzerland

417562-111

System Unit
1
*
2

Front bezel with bezel blank
Front bezel without bezel blank (for China only)
Access panel

Chassis

not spared

Greek

Power supply, PFC, 300W

447584-001

Hungarian

234963-211

Turkish

316904-141

335937-001

Israel

316904-BB1

United Kingdom

158593-031

Bezel blank, 5.25 inch

*Not shown

dx7400 Illustrated Parts & Service Map, MT Chassis

459782-001

page 1

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
-231

French

-051

Slovakian

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

Miscellaneous Parts
1

Chassis fan with mounting screws

438741-001

Heatsink with alcohol pad and factory-applied thermal grease

441391-001

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:
*

Standard and Optional Boards
Memory modules, non-ECC, DDR2
1

256 MB, PC2-5300, CL5

396519-001

512 MB, PC2-5300, CL5

396520-001

1 GB, PC2-5300, CL5

398038-001

2 GB, PC2-5300, CL5

450367-001

512 MB, PC2-6400, CL6

418952-001

1 GB, PC2-6400, CL6

418951-001

2 GB, PC2-6400, CL6

457624-001

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

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

dx7400 Illustrated Parts & Service Map, MT Chassis

459782-001

page 2

System Board

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.

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

Boot

F9 Boot Menu Disable/enable

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

Power supply connector (24-pin)

P150

Media card reader

Power supply connector (4-pin)

SW50

Clear CMOS switch

Power switch/LED connector

XBT1

Battery

Speaker connector

DIMM A1 Memory slot

Heatsink fan

DIMM A2 Memory slot

Chassis fan

DIMM B1 Memory slot

P10

Floppy drive connector

DIMM B2 Memory slot

P23

Front audio connector

XU1

Primary processor socket

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 recognized 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 operating system image.

Network Boot
Seq.

Allows you to specify the order in which network devices
(including UP NIC cards) are checked for a bootable operating 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- Allows you to establish a password to enter the computer
word
(must have Supervisor password established)

System Setup and Boot

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.

System Fan
Fail Check

Disable/enable

Computer Setup Menu

Smart Fan
Function

Disable/enable

Heading

Option / Description
Lists the following main system specifications:

Current CPU
Temperature

View only

System
Information

Current System Temp

View only

Current CPU
Fan Speed

View only

Current System Fan
Speed

View only

Vcore

View only

12V

View only

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.
PC Health

Main

•
•
•
•
•
•

Product Name
SKU Number
Processor Type
Processor Speed
System ROM
Cache Size

Memory Size
Integrated MAC
UUID
System Serial #
Asset Tracking Number

Allows you to set system date.
Date
(mm/dd/yyyy)
Time
(hh/mm/ss)

Advanced

•
•
•
•
•

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

Execute Disable 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).

Exit

View only

5VSB (V)

View only

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.

System Hardware Interrupts
IRQ

System Function

IRQ

System Function

Timer Interrupt

Real-Time Clock

Keyboard

Unused

Interrupt Controller Cascade

Unused, available for PCI

Serial Port (COM B)

Unused, available for PCI

Serial Port (COM A)

Mouse

Unused, available for PCI

Coprocessor

Diskette Drive

Primary ATA (IDE) Controller

Parallel Port (LPT 1)

Secondary ATA (IDE) Controller

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 Parallel Port

Allows you to select: Disabled, 378/IRQ7, 278/IRQ5, or
3BC/IRQ7.

459782-001

View only

VBAT (V)

Load OptiAllows you to reset Computer Setup to factory defaults.
mized defaults

dx7400 Illustrated Parts & Service Map, MT Chassis

page 3

Failsafe Boot Block ROM
Common POST Error Messages

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:

Screen Message

Probable Cause

Recommended Action

101-Option ROM Checksum Error

1. System ROM checksum
error.

1. Verify ROM, reflash if required

2. Expansion board option
ROM checksum

3. Clear CMOS memory, reboot

3. System board

Boot Block Recovery

103-System Board
Failure

DMA, timers

164-Memory Size Error
and
201-Memory Error

Incorrect memory configuration

2. Remove suspected card, reboot
4. Replace system board
1. Clear CMOS memory.
2. Remove expansion boards.

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

3. Replace system board.

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.

1. Run Setup (F10).
2. Check DIMMs for proper
seating, type, and HP
compatibility.
3. Remove DIMMs singularly and
reboot to isolate faulty DIMM.

Password Security

4. Replace system board.

Establishing a Supervisor Password:

214-DIMM Configuration Warning

Populated DIMM configura- Rearrange the DIMMs so that
tion is not optimized
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 problem.

501-Display Adapter
Failure

Graphics display controller.

1. Reseat graphics card.

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.

2. Clear CMOS.

Establishing a User Password:

3. Check monitor connection.

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

4. Replace graphics card.

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.

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 Selftest.

3. Select Boot > Set User Password and follow the instructions on the screen.
Before exiting, click File > Save and Exit Setup.

Changing a Password:

2. Apply hard drive firmware
patch if applicable.

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

3. Back up contents and replace
hard drive.

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

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

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.

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.

Deleting a Password

1801-Microcode Patch
Error

1. Upgrade BIOS to proper
version.

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

Processor not supported by
ROM BIOS.

2. Change the processor.

Diagnostic Functions
Diagnostic functions are provided by the Setup Utility (in system ROM) and by Insight Diagnostics. Insight Diagnostics provides detailed system information including:

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.

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:

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

1. Go to www.hp.com

4. Turn on the computer.

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.

Error Conditions and Messages

4. Select the specific product.
How It Is
Established

Feature

Purpose

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

6. Click the Diagnostics link.
7. Select HP Insight Diagnostics Offline Edition.
8. Select the proper language and click Download.

BIOS Write Protect

Restricts ability to change ROM BIOS without approval.

Setup Utilities

USB Controller

Allows you to disable or enable all USB
devices.

Setup Utilities

dx7400 Illustrated Parts & Service Map, MT Chassis

5. Select the OS.

459782-001

Diagnostic LEDs
LED

Color

LED Activity

State/Message

Power

Green

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

System does not power on and
LEDs are not flashing

System unable to power on

page 4

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