Asus PS4 - Manual (Page 55)

ASUS RS500A-E6/PS4 4-7
6. Force BIOS recovery setting (3-pin RECOVERY1)
This jumper allows you to quickly update or recover the BIOS settings when it
becomes corrupted.
To update the BIOS:
1. Set the jumper to pins 2–3.
2. Insert the USB flash that contains the original or latest BIOS and turn on
the system to recover or update the BIOS.
3. Shut down the system.
4. Set the jumper back to pins 1–2.
5. Turn on the system.