Don't know if it will work, but try setting the option "Halt on" in the BIOS to "no errors", and see if it will POST. Those symptoms could be an indication that there is a problem with the ps/2 port ...

I’ve used Google’s Gboard keyboard on my Android phone for years, but I stumbled across an unusual alternative, which intrigued me because it promised to make typing on a phone screen fast by using ...