Activity

Beeps

Possible cause

Recommended action

 

 

 

 

 

Red Power LED flashes eleven

11

The current processor does

1.

Install a TXT capable processor.

times, once every second,

 

not support a feature

 

 

followed by a two second

 

previously enabled on this

2.

Disable TXT in the Computer Setup (F10)

pause. Beeps stop after fifth

 

system.

 

utility.

iteration but LEDs continue until

 

 

3.

Reinstall the original processor.

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 white, 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

 

 

 

white 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.

Interpreting POST diagnostic front panel LEDs and audible codes 199

Page 209
Image 209
HP E1Z75UT E1Z75UT#ABA, E1Z74UT E1Z74UT#ABA, E1Z77UT E1Z77UT#ABA manual Install a TXT capable processor