Table D-2 Diagnostic Front Panel LEDs and Audible Codes (continued)
Activity Beeps Possible Cause Recommended Action
Red Power LED flashes two
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
2 Processor thermal
protection activated:
Fan may be blocked or
not turning.
OR
The heatsink/fan
assembly is not properly
attached to the processor.
1. Ensure that the computer air vents are not
blocked and the fan is running.
2. Open the cover, press the power button,
and see if the fan spins. If the fan is not
spinning, make sure the fan's cable is
plugged onto the system board header.
3. If the fan is plugged in, but is not spinning,
then replace heatsink/fan assembly.
4. Contact an authorized reseller or service
provider.
Red Power LED flashes three
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
3 Processor not installed
(not an indicator of bad
processor).
1. Check to see that the processor is present.
2. Reseat the processor.
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.
4 Power failure (power
supply is overloaded).
1. Ensure the DC power cable is plugged into
the I/O panel.
2. Check if a device is causing the problem by
removing ALL attached devices (such as a
hard drive). Power on the system. If the
system enters the POST, then power off
and replace the device to see if the problem
is resolved.
3. Replace the power supply.
4. Replace the system board.
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.
5 Pre-video memory error. CAUTION: To avoid damage to the SODIMMs
or the system board, you must unplug the
computer power cord before attempting to
reseat, install, or remove a SODIMM module.
1. Reseat SODIMMs.
2. Replace SODIMMs one at a time to isolate
the faulty module.
3. Replace third-party memory with HP
memory.
4. Replace the system board.
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.
6 Pre-video graphics error. 1. Unplug the power cord. Press the CMOS
reset button. Install the FDO jumper to
disable ME (or remove the FDO jumper to
disable ME if it was installed).
2. Replace the system board.
128 Appendix D POST Error Messages
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