HP Compaq 6005 Pro Maintenance And Service Manual page 143

Table F-2 Diagnostic Front Panel LEDs and Audible Codes (continued)
Activity
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.
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.
Beeps Possible Cause
3 Processor not installed
(not an indicator of bad
processor).
4 Power failure (power
supply is overloaded).
OR
The incorrect external
power supply adapter is
being used on the USDT.
5 Pre-video memory error.
6 Pre-video graphics error.
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes
Recommended Action
1. Check to see that the processor is present.
2. Reseat the processor.
1. Check if a device is causing the problem by
removing ALL attached devices (such as
hard or optical drives). 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.
2. Replace the power supply.
3. Replace the system board.
OR
The USDT power supply adapter must be at
135W and use the Smart ID technology before
the system will power up. Replace the power
supply adapter with the HP-supplied USDT
power supply adapter.
CAUTION: To avoid damage to the DIMMs or
the system board, you must unplug the computer
power cord and wait 30 seconds 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 integrated graphics, replace
the system board.
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