Can you try clearing coms?
please unplug the power supply and HDMI cable.Please hit the pinhole of "CLR CMOS" with a pin for about 10 seconds.Ten minutes later, plug the power supply and HDMI cable, turn on the PC again.
Meanwhile, please try setting the bios to default:Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. On Save&Exit page, please click Restore defaults, press enter to confirm, then press F4 to save.
Can you send us the SN code of your machine? We will send you the system files, and you can try reinstalling the system as follows
Wish you have a nice day