Power Supply Test Switch Procedure
Before you replace a power supply, use this procedure to determine if the power supply
needs replacing.
1. Perform steps 1 through 7 in “Power Supplies and Power Supply Fan Assemblies”
on page 454.
2. Connect the power cord to the power supply and look at the front of the power
supply.
v If the LED on the front of the power supply is not blinking, the power supply is
defective. Continue with step 8 in “Power Supplies and Power Supply Fan
Assemblies” on page 454.
v If the LED on the front of the power supply is blinking, go to the next step.
Test
Switch
3. Use a pencil to press the test switch on the side of the power supply.
v If the LED on the front of the power supply is on steady and the internal fan
spins, the power supply is good and can be returned to the system.
v If the LED on the front of the power supply is not on steady and the internal fan
does not spin, the power supply is defective. Continue with step 8 in “Power
Supplies and Power Supply Fan Assemblies” on page 454.
Chapter 9. Removal and Replacement Procedures 457
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