Table A-2Diagnostic Front Panel LEDs and Audible Codes (continued)

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

 

 

 

Red Power LED flashes four

4

Power failure (power

1.

Open the hood and ensure the 4 or 6-wire

times, once every second,

 

supply is overloaded).

 

power supply cable is seated into the

followed by a two second

 

 

 

connector on the system board.

pause. Beeps stop after fifth

 

 

2.

Check if a device is causing the problem by

iteration but LEDs continue

 

 

until problem is solved.

 

 

 

removing ALL attached devices (such as

 

 

 

 

hard, diskette, or optical drives, and

 

 

 

 

expansion cards). Power on the system. If

 

 

 

 

the system enters the POST, then power off

 

 

 

 

and replace one device at a time and repeat

 

 

 

 

this procedure until failure occurs. Replace

 

 

 

 

the device that is causing the failure.

 

 

 

 

Continue adding devices one at a time to

 

 

 

 

ensure all devices are functioning properly.

 

 

 

3.

Replace the power supply.

 

 

 

4.

Replace the system board.

 

 

 

 

 

 

 

Red Power LED flashes five

5

Pre-video memory error.

 

 

 

 

 

 

CAUTION: To avoid damage to the

times, once every second,

 

 

 

 

 

 

 

 

DIMMs or the system board, you must

followed by a two second

 

 

 

 

 

 

 

 

unplug the computer power cord before

pause. Beeps stop after fifth

 

 

 

 

 

 

 

 

attempting to reseat, install, or remove a

iteration but LEDs continue

 

 

 

 

 

 

 

 

DIMM module.

until problem is solved.

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Reseat DIMMs.

 

 

 

2.

Replace DIMMs one at a time to isolate the

 

 

 

 

faulty module.

 

 

 

3.

Replace third-party memory with HP

 

 

 

 

memory.

 

 

 

4.

Replace the system board.

 

 

 

 

 

 

Red Power LED flashes six

6

Pre-video graphics error.

For systems with a graphics card:

times, once every second,

 

 

1.

Reseat the graphics card.

followed by a two second

 

 

pause. Beeps stop after fifth

 

 

2.

Replace the graphics card.

iteration but LEDs continue

 

 

until problem is solved.

 

 

3.

Replace the system board.

 

 

 

 

 

 

For systems with integrated graphics, replace the

 

 

 

system board.

 

 

 

 

Red Power LED flashes seven

7

System board failure

Replace the system board.

times, once every second,

 

(ROM detected failure

 

 

 

 

followed by a two second

 

prior to video).

 

 

 

 

pause. Beeps stop after fifth

 

 

 

 

 

 

iteration but LEDs continue

 

 

 

 

 

 

until problem is solved.

 

 

 

 

 

 

Red Power LED flashes eight 8

Invalid ROM based on bad

times, once every second,

checksum.

followed by a two second

 

pause. Beeps stop after fifth

 

iteration but LEDs continue

 

until problem is solved.

 

1.Reflash the system ROM with the latest BIOS image. See the “Boot Block Emergency Recovery Mode” section of the Desktop Management Guide on the Documentation and Diagnostics CD for more information.

2.Replace the system board.

ENWW

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 57