Solving Power Supply Problems - HP xw4550 Service And Technical Reference Manual

Table 5-2 Minor problems (continued)
Problem
Poor performance is experienced. Processor is hot.
Workstation powered off
automatically and the Power LED
flashes red 2 times, once every
second, followed by a 2-second
pause, and two simultaneous
audible beeps.
System does not power on, and
the LEDs on the front of the
workstation are not flashing.

Solving power supply problems

This section presents troubleshooting information for power supply problems.
Table 5-3 Power supply problems
Problem
Power supply shuts down
intermittently.
After AC power is applied, system
powers up for 2-3 seconds and then
powers down.
ENWW
Cause
Hard drive is full.
Processor thermal protection
activated.
A fan might be blocked or not
turning.
OR
The processor heatsink is not
properly attached to
the processor.
System unable to power on.
Cause
Power supply fault.
This behavior is normal. The
system is restoring WOL
settings lost during AC power
loss.
Possible Solution
1. Ensure airflow to the workstation is not blocked.
2. Ensure the fans are connected and working properly
(some fans only operate when needed).
3. Ensure the processor heatsink is installed properly.
Transfer data from the hard drive to create more space on
the hard drive.
1. Be sure workstation air vents are not blocked and the
cooling fan is running.
2. Open the access panel, press the power button, and
see if the processor fan spins. If not spinning, be sure
the fan cable is plugged into the system board header.
Ensure the fan is fully and properly seated or installed.
3. Replace the processor fan.
4. Reseat processor heatsink and verify that the fan
assembly is properly attached.
Press and hold the power button for less than 4 seconds. If
the hard drive LED turns green, then:
1. Remove the expansion cards.
2. Replace the system board.
OR
Press and hold the power button for less than 4 seconds. If
HDD LED does not illuminate, then:
1. Verify that the workstation is plugged into a working AC
outlet.
2. Open the workstation 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.
Solution
Replace the power supply.
No action required. This behavior occurs whether or not
WOL is enabled.
Customer self help 105