Be careful opening PSU's. They are not made to be serviced by people because they hold a charge in them even after being unplugged and could give you a good jolt if not careful. Best thing to do is buy a new one or one that is comparable. Far as removing rivets, they are used as not to be removed and it is advised that you dont, but if you must a flathead screwdriver against the head of them and a small hammer can remove them. Keep in mind that the other end of the rivet can fall into the inner part of the PSU. Cheers!!!
