Need some help on fixing a gpu. My friend's gpu was broken, and I help him to fix it. Upon further diagnosis, I found that some thermal paste shorted the gpu itself. I can smell some fried components too. Can you even fix that?
Are you sure it was the thermal paste that shorted the gpu, and not the power supply?
Do you even know what kind of thermal paste was used? There are conductive and non-conductive pastes. It would be pretty dang silly on the manufacturer's part to use conductive thermal paste on the gpu...
Unless your friend did his own paste job using a conductive brand on the gpu, the odds the psu roasted it are high.
Quite normal for some paste to spread past the gpu core due to the mounting pressure. A little overflow isn't a problem, unless... conductive TP was used which would be pretty dumb on the manufacturer's end - instant RMA, and get your money back.