HP Xw9300 - Workstation - 1 GB RAM Technical Reference Manual page 143

Table 5-23 Solving Minor Problems
Problem
Workstation powered off
automatically and beeps
and blink RED twice.
System does not power on
and the LEDs on the front of
the workstation are not
flashing.
Cause
Processor thermal protection
activated:
A fan might be blocked or not
turning.
OR
The CPU heatsink is not
properly attached to
the processor.
System is unable to power on. Press and hold the power button for less than four
Possible Solution
1. Be sure workstation air vents are not blocked and
the cooling fan is running.
2. Open hood, press power button, and see if the
processor fan spins. If not spinning, be sure the
fan's cable is plugged onto the system board
header. Be sure the fan is fully/properly seated or
installed.
3. Replace the processor fan.
4. Reseat CPU heatsink and verify that the fan
assembly is properly attached.
seconds. If the hard drive LED turns green:
1. Check that the power supply cables are properly
connected to the system board.
2. Remove the expansion cards.
3. Replace the system board.
OR
Press and hold the power button for less than four
seconds. If the hard drive LED does not illuminate:
1. Check that the unit is plugged into a working AC
outlet.
2. Open the access panel and check that the power
button harness is properly connected to the in-line
front panel I/O device assembly connector.
3. Check that the power supply cables are properly
connected to the system board.
4. Check the power supply functionality.
a. Disconnect the AC power.
b. Remove all internal power supply cables from
the system board.
c. Plug in the AC power.
• If the power supply fan spins and the BIST
LED lights, the power supply is functional,
so replace the system board.
• If the power supply fan does not spin or
the BIST LED does not light, replace the
power supply.
Troubleshooting Scenarios and Solutions 143