NEC Server 140Rc-4 - Manual (Page 248)

8-10 Troubleshooting
Power Lamp
The power supply unit has the Power lamp. When the power of the server is turned on, the lamp
goes on green. If the lamp is not lit after turning on the power of the server, the power supply unit
may be defected. Contact you service representative to replace the power supply unit.
NOTE: The server equipped with an optional power supply unit can
continue the operation with the standard power supply unit if the other
power supply unit is defected (redundant function). The defected
power supply unit can be replaced with a new one in the hot-swap
mode without power interruption.
POWER lamp