Button above power cord?

#13. Power supply diagnostic button

Diagnostic button for the power supply known as PSU BIST (Built In Self Test). This tool enables technical support agents to determine if the PSU is working properly.

PSU BIST has 2 diagnostic results – Green LED = PASS, no LED = Troubleshoot (you will need to troubleshoot to fault isolate if the PSU BIST fails).

Proper usage of PSU BIST requires multiple attempts to fault isolate whenever a faulty component is present.

Perform the Power Supply (PSU) Built In Self Test (BIST) to make sure there are no issues with the PSU.

• Do this by pressing and holding the test button on the PSU where the AC cable is connected. The LED will light up if the BIST test passes.
• If the PSU BIST passes, the issue may be with the Motherboard.
• If the PSU BIST fails, please refer to article 594010 on how to troubleshoot using the PSU BIST.