HP ProDesk 400 G2.5 Maintenance And Service Manual page 112

Activity
Red Power LED flashes six times,
once every second, followed by
a two second pause. Beeps stop
after fifth iteration but LEDs
continue until problem is solved.
Red Power LED flashes seven
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
Red Power LED flashes eight
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
Red Power LED flashes nine
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
Red Power LED flashes ten
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
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.
System does not power on and
LEDs are not flashing.
104 Chapter 7 POST error messages
Beeps Possible cause
6 Pre-video graphics error.
7 System board failure (ROM
detected failure prior to
video).
8 Invalid ROM based on bad
checksum.
9 System powers on but is
unable to boot.
10 Bad option card.
11 The current processor does
not support a feature
previously enabled on this
system.
None System unable to power on.
Recommended action
4. Replace the system board.
For systems with a graphics card:
1. Reseat the graphics card.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graphics, replace the
system board.
Replace the system board.
1. Reflash the system ROM with the latest BIOS
image.
2. Replace the system board.
1. Check that the voltage selector, located on the
rear of the power supply (some models), is set
to the appropriate voltage. Proper 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.
3. Replace the system board.
4. Replace the processor.
1. Check each option card by removing the card
(one at a time if multiple cards), then power on
the system to see if fault goes away.
2. Once a bad card is identified, remove and
replace the bad option card.
3. Replace the system board.
▲ Reinstall the original processor.
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.