HP ProDesk 400 G1 Maintenance And Service Manual page 211

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.
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.
Interpreting POST diagnostic front panel LEDs and audible codes
Recommended action
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.
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