Silicon Graphics Altix XE340, User Manual, Page: 37 / 70

Power Supply
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The LED located directly above the power connector on the supply has three states:
• Dark - no AC power is available to the supply
• Yellow - AC power available to the supply but the server is not powered on
• Green - AC power is applied and the system is on (front panel power button pushed to on)
Power Supply Failure
If the power supply unit fails, the system will shut down and you will need to replace the power
supply unit. Replacement units can be ordered directly from your SGI sales or service
representative.
If the power supply has failed, the LED located directly above the AC power connector should be
off (unlit). Be sure the system power cord is fully plugged in to a power distribution unit that is
turned on before replacing the supply.
Removing the Power Supply
Use the following steps to remove a failed power supply from the server:
1. Power off both nodes and unplug the power cord from the system.
2. The power supply may be hot if the system has been running - make sure the server has at
least 5 minutes to cool down.
3. Use the power-supply handle (located at the rear of the system) to grasp the power supply.
4. Grasp the power supply handle (see Figure 4-4 on page 28), move the lever to the right and
pull the supply straight out the back of the chassis.
5. Lift the unit away from the chassis.