HP ProOne 400 G1 Maintenance & Service Manual page 168

Table 10-2
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.
158 Chapter 10 POST Error Messages
Diagnostic front panel LEDs and audible codes (continued)
Beeps
4
5
6
7
8
Possible Cause Recommended Action
Power failure (power 1.
supply is overloaded).
2.
3.
4.
Pre-video memory error. CAUTION:
the system board, you must unplug the computer
power cord before attempting to reseat, install, or
remove a DIMM module.
1.
2.
3.
4.
Pre-video graphics error. For systems with a graphics card:
1.
2.
3.
For systems with integrated graphics, replace the
system board.
System board failure Replace the system board.
(ROM detected failure
prior to video).
1.
Invalid ROM based on
bad checksum.
2.
Open the hood and ensure the 4 or 6-wire
power supply cable is seated into the
connector on the system board.
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.
Replace the power supply.
Replace the system board.
To avoid damage to the DIMMs or
Reseat DIMMs.
Replace DIMMs one at a time to isolate the
faulty module.
Replace third-party memory with HP
memory.
Replace the system board.
Reseat the graphics card.
Replace the graphics card.
Replace the system board.
Reflash the system ROM with the latest BIOS
image. See the "Boot Block Emergency
Recovery Mode" section of the Desktop
Management Guide for more information.
Replace the system board.