HP xw4000 Service & Reference Manual page 150

Diagnostic Indicator Lights
System Board Diagnostic Lights
Main
Power
Switch
Status
OFF
ON
1. ON and OFF state of LEDs apply only to a good, working system board with AC
power applied to the power supply.
2. Power LED is OFF.
3. Power LED is ON. (Green)
4. 5V_Aux is ON.
5. PSON is active = power supply turned ON.
6. All except SFF.
D–2
3.3 V_Aux
LED
ON
2
ON
3
—Desktop Computers and Workstations
1
5 V_Aux/ Power Button
PSON LED LED
ON OFF
4
OFF ON
5
6
Service Reference Guide