Ah, the good 'ol if it don't fit, force it approach
The hilarious thing about this kind of thing is my brother-in-law once called me a few years ago about this new PC he had build from brand new parts and wouldn't boot.
I went through all the possible issues I could think of, RAM badly inserted or defective, heatsink fan not working, everything. Alas, it was to no avail and I couldn't find the fault.
So I counselled him to go to my favorite PC repair shop and have them look at it. Sure enough, they found the problem : my brother-in-law had put in the CPU wrong, which means he had forced the heatsink onto it. Obviously, the motherboard had hardly appreciated the situation and he was good for buying another motherboard and another CPU.
Oh, by the way, he has a masters in optoelectronics.
I'll just let that sink in . . .