We had a power surge the other night, since then my roommates computer been experiencing strange issues. Firstly it likes to sit for a long time at POST before moving on, like sometimes its there for 20mins. Also his alt ctr and shift buttons all stopped responding regardless of the keyboard he was using. Then he started to have crashes etc while playing games. What's most likely to have been damaged? I assume motherboard or possible the hdd because of the boot issues and windows problems but I'm not entirely sure. The power supply doesn't seem to be damaged, I haven't smelled any smoke or noticed anything suspicious.