We’ve one Supermicro server using DP motherboard, can’t boot and stop in DXE-USB Device Detection screen.
Can’t touch any key (TAB/DEL/F11/F12). Do you have any good resolution or need replacement HW?
Please try unplugging AC for about 30 sec, then replug AC and turn on the system to see if it can POST. If yes, please update BIOS and IPMI to the latest version. After updating the BIOS and IPMI, please do a clear CMOS for a few minutes, and also set Factory Default on IPMI via Web GUI.