EDIT: We decided not to pursue further diagnosis, because we wouldn’t know what the hell we’re doing anyway, and decided to start the RMA process instead. It might not even be the reason why the PC won’t turn on, but I’m not comfortable with putting that CPU back into his PC again. Once we get a replacement, we’ll see what happens. If it’s still busted, we’ll just take it to a local shop. Thank you everyone for your for your suggestions and insight, they are very much appreciated.
My friend called me to take a look at his PC that wouldn’t turn on. Upon inspecting his CPU, I noticed a silver bump at the bottom. I’ve never seen this. Can anyone tell me what it is?
With a bit there the cooler probably isn't making good contact with the CPU, but if that was the case I wouldn't expect it to just die if it was working before. Though the higher heat may have caused permanent issues too, hard to say.
I have an all in one CPU liquid cooler that had a bracket on incorrectly but it still worked fine until I played with overclocking so that's all I base this comment on.