IBM 866441Y Hardware Maintenance Manual - Page 204

AC Power LED On On Off DC Power LED On Off Off Description and action The power supply is on and operating correctly. There is a DC power problem. Possible causes: 1. The Power Control button on the front of the server is in the Off position. Action: Press the Power Control button to start the server. 2. The power supply has failed. Action: Replace the power supply. There is an AC power problem. Possible causes: 1. There is no AC power to the power supply. Actions: Verify that: The power cord is properly connected to the server. The power outlet functions properly. 2. The power supply has failed. Action: Replace the power supply. If the problem persists, go to "Undetermined problems" on page 215 Diagnostics panel LEDs: The following illustration shows the LEDs on the diagnostics panel inside the server. See "Light path diagnostics" on page 13 for information on identifying problems using these LEDs. 196 Netfinity Server HMM