Black lines and dots are appearing in game and stuff on my wii, have been for a really long time. I know it's some kind of GPU overheating, but is it fixable?(my wii is modded and has no case so I can't really send it in) People on the internet all say to send it to Nintendo due to faulty GPUs and stuff, but it's just the heating. Right? Could I just reflow the Playstation some way or another and go on with my life?