HP Compaq dc7900 SFF Specifications download pdf (Page 4)

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

cedure:

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

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

Diagnostic LEDs

LED Color LED Activity State/Message

Power Green On Computer on

Power Green 1 blink every 2 seconds Normal Suspend Mode

Power Red 1 blink every second followed

by a 2 second pause

CPU thermal shutdown

Power Red 3 blinks, 1 blink every second

followed by a 2 second pause

Processor not installed

Power Red 4 blinks, 1 blink every second

followed by a 2 second pause

Power failure (power supply overload)

Power Red 5 blinks, 1 blink every second

followed by a 2 second pause

Pre-video memory error

Power Red 6 blinks, 1 blink every second

followed by a 2 second pause

Pre-video graphics error

Power Red 7 blinks, 1 blink every second

followed by a 2 second pause

System board failure (ROM

Power Red 8 blinks, 1 blink every second

followed by a 2 second pause

Invalid ROM based on Checksum

Power Red 9 blinks, 1 blink every second

followed by a 2 second pause

System powers on but is unable to boot

Power Red 10 blinks, 1 blink every second

followed by a 2 second pause

Bad option card

Power Red 11 blinks, 1 blink every second

followed by a 2 second pause

The current processor does not support

a feature previously enabled on this

system.

none none System does not power on and

LEDs are not flashing

System unable to power on

Common POST Error Messages

Screen Message Probable Cause Recommended Action

101-Option ROM Error 1. System ROM checksum

error.

2. Expansion board option

ROM checksum

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.

1 2 3 4

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HP Compaq dc7900 SFF Specifications Page 4

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