Not necessarily a cheap PS but probably. Question. Did you have to connect up any wires yourself? I remember about 15-20 years ago buying a PS that had no instructions or labels for the cables. Back then you could connect the PS backwards and when I did POW. There are usually a safety built in for a one-time accident like that but no guarantee when companies don't obey the law. Good luck. As SR pointed out you could have done more damage than you know.