I've had to do this to one of my segas. Its not to hard. Just take the top of it off, then you will have a few screws that are holding on a rf sheild. Remove the sheild and then I think there may be a few more screws holding the pcb down. Pull the board out, plai it over, and then just resolder the pins that are holding the power plug on to the board. Then reasemble. While its apart you might want to resolder the controller ports to. I had to do this to mine also because I would have to push down on my controller cable to get it to work.