Front Panel LEDs
Part number 3501129,3501224

The front panel features five LEDs.

  1. Power supply 2 status LED – Glows green when the second power supply module is on and working correctly. Flashes when power from that module is interrupted.

  2. Power supply 1 status LED – Glows green when the first power supply module is on and working correctly. Flashes when power from that module is interrupted.

  3. System fault LED – Indicates Error Checking and Correcting (ECC) memory system fault. Steady yellow indicates an uncorrectable ECC fault, and blinking yellow indicates a correctable ECC fault. The LED also illuminates if the front bezel is removed, when there is a chassis intrusion, or a system error that is logged in the DMI log.

  4. Hard drive activity LED – Flashes green when data is read from or written to a hard drive.

  5. Power LED – Glows green when the computer is turned on.