Aporte original por: zzz ,
It should not be hot, even when the machine is on. PCH is dead! This is a $@$* board to repair. Tell me if you see the number 820-3023 on your board. This has nothing to do with your OS upgrade and everything to do with bad luck and bad timing. The proper repair for you is to pick up a used board for $200 and toss the old one in the trash.