I'm assuming that it's a dead battery. When I try to save in Rayman 2 it saves properly, but when I shut the N64 off, it tells me it's corrupted or damaged. If I press the reset button, the save file is still there, but if I unplug the controller it'll tell me the save if corrupted. I'm pretty sure that the battery inside is dead, but if it isn't, is there a way to fix it?