HP ProDesk 400 G1 Micro Maintenance and Service Guide ProDesk 400 G1 Microtowe - Page 212

Red Power LED flashes eleven, Open hood and check that the power button

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Activity Beeps Red Power LED flashes eleven 11 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. System does not power on and None LEDs are not flashing. Possible cause Recommended action The current processor does 1. Reinstall the original processor. not support a feature previously enabled on this system. System unable to power on. Press and hold the power button for less than 4 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. 202 Chapter 9 POST error messages

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Activity
Beeps
Possible cause
Recommended action
Red Power LED flashes eleven
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue until
problem is solved.
11
The current processor does
not support a feature
previously enabled on this
system.
1.
Reinstall the original processor.
System does not power on and
LEDs are not flashing.
None
System unable to power
on.
Press and hold the power button for less than 4
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.
202
Chapter 9
POST error messages