Power Supply Test Switch Procedure
Before you replace a power supply, you can perform this test to determine if the
power supply needs replacing.
1. Perform steps 1 through 6 in “Power Supplies and Power Supply Fan
Assemblies” on page 7-19.
2. Re-plug the line cord into the power supply.
a. If the LED on rear of the power supply is not blinking, continue with step 7 in
“Power Supplies and Power Supply Fan Assemblies” on page 7-19.
b. If the LED on rear of the power supply is blinking, use a pencil to press the
test switch on the side of the power supply.
a. If the LED on rear of the power supply is on steady and the fans spin, the
power supply is good and can be returned to the system.
b. If the LED on rear of the power supply is not on steady and the fans do not
spin, continue with step 7 in “Power Supplies and Power Supply Fan
Assemblies” on page 7-19.
7-18 RS/6000 Enterprise Server Model H50 Installation and Service Guide
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