HP xw4550 Service And Technical Reference Manual page 111

Workstation
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NOTE:
The diagnostic beeps are audible through the chassis speaker. Both the flashing LEDs and
audible beeps repeat for five cycles. Following that, only the flashing LEDs continue to repeat.
Table 5-1
Diagnostic LED codes
Chassis indicator LEDs
Power LED and audible beep
activity
None
Blinks red 2 times, once per
second, then 2-second pause,
2 beeps
Blinks red 3 times, once per
second, then 2-second pause,
3 beeps
Blinks red 4 times, once per
second, then 2-second pause,
4 beeps
Blinks red 5 times, once per
second, then 2-second pause,
5 beeps
Blinks red 6 times, once per
second, then 2-second pause,
6 beeps
ENWW
Diagnosis and service action
System does not power on. Press the power button. If HDD LED = GREEN, then:
1.
Remove expansion cards one at a time.
2.
Replace the system board.
OR
Press the power button. If HDD LED does not illuminate, then:
1.
Verify that the workstation is plugged into a working AC outlet.
2.
Open access panel and verify that the power button harness is properly connected
to the inline front panel I/O device assembly connector.
3.
Verify that the power supply cables are properly connected to the system board.
Thermal shutdown has occurred:
1.
Ensure that the workstation air vents are not blocked and the cooling fan is
running.
2.
Open the access panel, press power button, and determine whether the processor
fan spins. If it does not spin, ensure the fan cable is plugged into the system board.
Ensure that the fan is properly seated.
3.
If the fan is plugged in and seated but not spinning, then replace processor fan.
4.
Reseat the processor heatsink and verify that the fan assembly properly attached.
Processor not installed.
1.
Install processor.
2.
Reseat processor.
Power supply failure.
1.
Open the access panel and ensure the four-wire power supply cable is properly
connected to the system board power connector P3.
2.
Locate faulty device by removing all devices and then reinstalling one at a time
until workstation fails. Replace the device causing the failure. Continue adding
devices to ensure all are functioning properly.
Pre-video memory error.
1.
Reseat memory modules.
2.
Replace memory modules one at a time to find the faulty module.
3.
Replace third-party modules with HP memory.
4.
Replace system board.
Pre-video graphic card error.
For systems with integrated graphics, replace system board.
Customer self help 103

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