Hello, since 1 month my wii starts making graphics artefacts. I read somewhere it is caused by the GPU that overheating and this problem known by nintendo need to send the wii to nintendo. So i got to put off the chip yaosm from the wii and delete everything on it (wiiware and personnal data) ? So after i do that, can i have any problems? How many times do they usually take to do send it back ? Can the reparation be done by modders ? Thanks in advance for yours answers !!