Identifying Problems Using Status LEDs

^{IBM-AUSTRIA - PC-HW-Support 30 Aug 1999}

Identifying Problems Using Status LEDs

Identifying Problems Using Status LEDs

The server has LEDs to help you identify problems with some server components. These LEDs are part of the diagnostics built into the server. By following the path of lights, you can quickly identify the type of system error that occurred.

Status LEDs are located on the following components:

Operator LED panel
For more information, see 'Front Panel Indicators'.
Hard disk drive trays
For more information, see 'Controls'.
Power supply
For more information, see 'Power Supply LEDs.'
System board
See 'System Board LEDs' for locations of the LEDs on the system board.

Power Supply LEDs: The AC Power LEDs, located on the rear of the power supply, provide status information about the power supply.
See 'Front Panel Indicators' for the location of these LEDs.

The following table describes the AC Power LEDs.

AC Power LED Description and Action On The power supply is on and operating correctly. Off 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. No beep, fans running, and AC power LED blinking System held in reset Possible causes: 1. If an optional VRM is installed and no optional processor. Action: Remove the optional VRM. 2. If optional VRM failed. Action: Replace the optional VRM. 3. If primary VRM failed. Action: Replace the system board. 4. If system board failed. Action: Replace system board.

AC Power LED	Description and Action
On	The power supply is on and operating correctly.
Off	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.
No beep, fans running, and AC power LED blinking	System held in reset Possible causes: 1. If an optional VRM is installed and no optional processor. Action: Remove the optional VRM. 2. If optional VRM failed. Action: Replace the optional VRM. 3. If primary VRM failed. Action: Replace the system board. 4. If system board failed. Action: Replace system board.

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