So your GPU is damaged but still allows you you to play games with some issues, and you are getting the same exact same problems as you had last time?. The last time did Nintendo confirm it was a GPU fault? If you have had this exact problem twice it has to be down to the same cause.
GPU overheating is a rarity with the Wii, some early machines were prone but they are likely out of circulation now. The Wii has excellent cooling and it\'s GPU runs at a low temp as does all it\'s semi conductors. However, I have noticed that in long periods of standby (numerous days) it can get very warm. I have found it is actually beneficial turning the console on to get the fans running. Tell me this, is it anywhere close to a radiator or another heat source?.
It could also be your electricity source also, a surge may have cause the damage to both your consoles and not heat, and you would have been none the wiser. If that is the case, it is due to another device either in the room or the home or the actual wiring causing the surges. You can take precautions by getting a surge-master extension (cheap). I use one for my Wii and PC and only just for them.
In all honesty I would say move your Wii, or at least move any stuff that is behind and around stopping good air flow, also be a bit mindful about playing for long periods when the central heating is on.
( Edited 18.03.2008 17:36 by Linkyshinks )