I built a computer for a friend and his DVD writer quit working. He replaced it and now this second one quit working again. It seems like it would have to be a power supply related problem, but he is not having any issues whit anything else. On the drives the tray still ejects but it won't read any discs. On the first one that broke, it caused some instabilities in windows but once he unplugged it those problems went away. He ran without a drive for about 6 months before he replaced it. Now this new one broke after a couple of months. Do you just think he is having bad luck and the third one is the charm, or do you think it is a power supply issue also? I'm going to be testing next week and i'd like to figure out the problem if there really is one. Any other ideas? thanks