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 DIMMs or

times, once every second,

 

 

the system board, you must unplug the computer

followed by a two second

 

 

power cord before attempting to reseat, install, or

pause. Beeps stop after fifth

 

 

remove a DIMM module.

iteration but LEDs continue

 

 

1.

Reseat DIMMs.

until problem is solved.

 

 

 

 

 

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

7

System board failure

Replace the system board.

seven times, once every

 

(ROM detected failure

 

 

second, followed by a two

 

prior to video).

 

 

second pause. Beeps stop

 

 

 

 

after fifth iteration but LEDs

 

 

 

 

continue until problem is

 

 

 

 

solved.

 

 

 

 

 

 

 

 

 

Red Power LED flashes eight

8

Invalid ROM based on

1.

Reflash the system ROM with the latest

times, once every second,

 

bad checksum.

 

BIOS image.

followed by a two second

 

 

2.

Replace the system board.

pause. Beeps stop after fifth

 

 

iteration but LEDs continue until problem is solved.

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 83