What needs to be done after unplugging the AC power cord for PSU BIST reset?

After unplugging the AC power cord for a Power Supply Unit (PSU) Built-In Self-Test (BIST) reset, it is essential to plug the AC power cord back in. This action restores power to the system and allows the PSU to perform the self-test procedure. During this reset process, the PSU needs to be powered on again to evaluate its functionality and ensure that it operates correctly.

The importance of this step cannot be overstated, as without restoring power to the PSU, the self-test cannot be conducted, and any potential issues within the power supply would remain unresolved. This step is crucial for troubleshooting purposes, ensuring that if there are any faults within the PSU, they can be detected during the BIST process.

Waiting for a duration, checking LED status, or rebooting the system would not facilitate the BIST reset; instead, they may be part of subsequent troubleshooting or operational checks after ensuring that the power supply is correctly energized. Therefore, plugging back in the AC power cord directly enables the PSU to initiate the self-test, making it the correct action to take immediately after unplugging.