I have this same issue, my PS5 got knocked over by one of my dogs and it's lost the ability to run PS5 games ever since.. black screen, monotone beep, error code blah, blah, blah. The only thing that I've found that somewhat works; and it's not a solution mostly a crappy band-aid, I'll turn my PS5 on and click into whatever PS5 game I want to play, then I'll go occupy myself for an hour and I've had like a 80% success rate that it will work. Sometimes it doesn't, some games still don't work regardless. Planning to just get a new PS5 this year.