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

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

 

Red Power LED flashes ten

10

Bad option card.

1.

Check each option card by removing the card

times, once every second,

 

 

 

(one at a time if multiple cards), then power

followed by a two second

 

 

 

on the system to see if fault goes away.

pause. Beeps stop after fifth

 

 

2.

Once a bad card is identified, remove and

iteration but LEDs continue

 

 

until problem is solved.

 

 

 

replace the bad option card.

 

 

 

3.

Replace the system board.

 

 

 

 

 

Red Power LED flashes eleven

11

The current processor

1.

Install a TXT capable processor.

times, once every second,

 

does not support a feature

2.

Disable TXT in the Computer Setup (F10)

followed by a two second

 

previously enabled on this

pause. Beeps stop after fifth

 

system.

 

utility.

iteration but LEDs continue

 

 

3.

Reinstall the original processor.

until problem is solved.

 

 

 

 

 

 

System does not power on and

None

System unable to power

Press and hold the power button for less than 4

LEDs are not flashing.

 

on.

seconds. If the hard drive LED turns green, the

 

 

 

power button is working correctly. Try the

 

 

 

following:

 

 

 

1.

Check that the voltage selector (some

 

 

 

 

models), located on the rear of the power

 

 

 

 

supply, is set to the appropriate voltage.

 

 

 

 

Proper voltage setting depends on your

 

 

 

 

region.

 

 

 

2.

Replace the system board.

 

 

 

OR

 

 

 

 

Press and hold the power button for less than 4

 

 

 

seconds. If the hard drive LED does not turn on

 

 

 

green then:

 

 

 

1.

Check that the unit is plugged into a working

 

 

 

 

AC outlet.

 

 

 

2.

Open hood and check that the power button

 

 

 

 

harness is properly connected to the system

 

 

 

 

board.

 

 

 

3.

Check that both power supply cables are

 

 

 

 

properly connected to the system board.

 

 

 

4.

Check to see if the 5V_aux light on the

 

 

 

 

system board is turned on. If it is turned on,

 

 

 

 

then replace the power button harness. If the

 

 

 

 

problem persists, replace the system board.

 

 

 

5.

If the 5V_aux light on the system board is not

 

 

 

 

turned on, remove the expansion cards one

 

 

 

 

at a time until the 5V_aux light on the system

board turns on. It the problem persists, replace the power supply.

ENWW

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 57

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Image 63
HP dc7800 tower manual Red Power LED flashes ten Bad option card
Page 62 Page 64

dc7800 tower specifications

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