HP Xw6400 - Workstation - 4 GB RAM Reference Manual page 115

Table 5-2 Diagnostic LED codes (continued)
Chassis indicator LEDs
Power LED and sound
activity
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
ENWW
Diagnosis and service action
OR
Press the power button. If HDD LED does not illuminate, then:
1. Verify that the unit 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.
4. Verify the power supply functionality.
a. Disconnect AC power.
b. Remove all internal power supply cables from the system board.
c. Plug in AC power.
◦
If the power supply fan spins and the BIST LED illuminates, then the power
supply is good. Replace the system board.
◦
If the power supply fan does not spin or the BIST LED does not illuminate,
replace the power supply.
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 CPU heatsink and verify that the fan assembly properly attached.
CPU not installed.
1. Install CPU.
2. Reseat CPU.
Power supply failure.
1. Open the access panel, and be sure the four-wire power supply cable is properly
connected to the system board.
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.
3. Verify the power supply functionality.
a. Disconnect AC power.
b. Remove all internal power supply cables from the system board.
c. Plug in AC power.
●
If the power supply fan spins and the BIST LED illuminates, then the
power supply is good. Replace the system board.
●
If the power supply fan does not spin or the BIST LED does not
illuminate, replace the power supply.
Diagnostic error codes 105