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 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 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

1.

Reflash the system ROM with the latest BIOS

times, once every second,

 

checksum.

 

image. See the “Boot Block Emergency

followed by a two second

 

 

 

Recovery Mode” section of the Desktop

pause. Beeps stop after fifth

 

 

 

Management Guide for more information.

iteration but LEDs continue

 

 

2.

Replace the system board.

until problem is solved.

 

 

 

 

 

 

 

Red Power LED flashes nine

9

System powers on but is

1.

Check that the voltage selector, located on

times, once every second,

 

unable to boot.

 

the rear of the power supply (some models),

followed by a two second

 

 

 

is set to the appropriate voltage. Proper

pause. Beeps stop after fifth

 

 

 

voltage setting depends on your region.

 

 

 

2.

Unplug the AC power cord from the

 

 

 

 

computer, wait 30 seconds, then plug the

 

 

 

 

power cord back in to the computer.

 

 

 

 

 

ENWW

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 53

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Image 59
HP 6005 Pro manual POST, then power off and replace one
Page 58 Page 60

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