Update — Pegatron Corporation Motherboard Bios

I used CPU-Z to identify the board. I tried searching the model number on Google, but the results are vague.

Wait at least 45 minutes. Pegatron boards used in HP systems are known for long flash times. If still stuck after 1 hour, you likely have a bricked board requiring a hardware programmer (CH341A) or a new motherboard. pegatron corporation motherboard bios update

After 20 minutes, Mark forced a reboot. The PC was a brick. I used CPU-Z to identify the board