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Table 7-1
Interpreting POST diagnostic front panel lights and audible codes (continued)
Activity
Red power light flashes six times,
once every second, followed by a
two second pause. Beeps stop
after fifth iteration but lights
continue until problem is solved.
Red power light flashes seven
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but lights continue until problem
is solved.
Red power light flashes eight
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but lights continue until problem
is solved.
Red power light flashes nine
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but lights continue until problem
is solved.
System does not power on and
lights are not flashing.
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.
None
System unable to power on.
Interpreting POST diagnostic front panel lights and audible codes
Recommended action
Replace the system board.
Replace the system board.
1.
Reflash the system ROM with the latest BIOS
image.
2.
Replace the system board.
1.
Unplug the AC power cord from the computer,
wait 30 seconds, then plug the power cord back
in to the computer.
2.
Replace the system board.
Press and hold the power button for less than 4
seconds. If the hard drive light turns white, the power
button is working correctly.
▲
Replace the system board.
OR
Press and hold the power button for less than 4
seconds. If the hard drive light does not turn on white
then:
1.
Check that the unit is plugged into a working AC
outlet.
2.
Replace the power supply.
75
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