>>1007289
If you leave it running for 5 to 10 minutes or more without doing anything, does anything change inside the PC like lights or sounds?

My current desktop wanted to validate the RAM once and it took a while. Could you flash a USB with BIOS to see if that's the issue in the rare event the device has been wiped cleaned?

Not sure what else you can try but >>1007290 could be worth a shot too