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HP EliteOne 800 G1 Maintenance & Service Manual page 199

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Activity
Red Power LED flashes four
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 five
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 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.
Beeps
Possible Cause
4
Power failure (power
supply is overloaded).
5
Pre-video memory error.
6
Pre-video graphics error.
7
System board failure
(ROM detected failure
prior to video).
8
Invalid ROM based on
bad checksum.
Interpreting POST diagnostic front panel LEDs
Recommended Action
1.
Open the hood and ensure the 4 or 6-wire
power supply cable is seated into the
connector on the system board.
2.
Check if a device is causing the problem by
removing ALL attached devices. Power on
the system. If the system enters the POST,
then power off and replace one device at a
time and repeat this procedure until failure
occurs. Replace the device that is causing
the failure. Continue adding devices one at
a time to ensure all devices are functioning
properly.
3.
Replace the power supply.
4.
Replace the system board.
CAUTION:
To avoid damage to the DIMMs or
the system board, you must unplug the computer
power cord before attempting to reseat, install, or
remove a DIMM module.
1.
Reseat DIMMs.
2.
Replace DIMMs one at a time to isolate the
faulty module.
3.
Replace third-party memory with HP
memory.
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.
189

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