Topic: Wii display problem...resolved????

For some time now my wii had display probs artfacs ans red and green dots on the screen....well for some od reason its went away...thoughs of u who have display probs like i did crosd your fingers it may have been just your wii being dirty...,ill update u all to let u no if it still works great...

Well just to update....the lines an dots came back ... I was playin last night and next thing i know they went away... I was like alright yeah my wii fixed ... This moring turned wii on an dang they came back...why they go away for is what im wondering...but none the less ill keep u all posted if any change...

Your graphics card is overheating and not being able to perform at its usual level. You'll need to send it to Nintendo for repairs. Make sure the area around your Wii, particularly the vents on the back, is kept cool and well-ventilated.

Try blowing into the AV plug and where it plugs in (but make sure your mouth is dry first; don't want to get the contacts wet). If that doesn't work, try using a different AV cable (temporarily trade with a friend) and see if the artifacts still occur. If that doesn't work, try using a different TV. If that doesn't work, try calling Nintendo customer support. Their number is on the back of manuals for systems and Nintendo games. If your Wii is still under warranty (if you bought it less than 2 years ago), they'll fix it for free, but if not, they'll charge you probably $75 for a fix. Well, at least that's what I had to pay to get my Wii fixed when it stopped wanting to read disks. I know I would have a hard time with having a buggered looking screen, and I would probably want to get that fixed.
EDIT: Oh, and what SuperSushiLax said.

Actually, what's occurring is that he has managed to scratch the GPU. Chances are that he has had his Wii for a while now and he got dust inside the system, which scratched the processor. The artifacts are going to get worse. You'll need to send it to Nintendo for repairs. Unfortunately, it's going to cost you about $90 to get it repaired. But they'll extend your warranty by a full year after they do the repairs. It should only take them about a week to do this.

I recommend getting a can of compressed air and blowing out your Wii's vents every month or so (maybe more) after you get it fixed. That should hopefully reduce the chance of this happening again.

This makes no sense what so ever. Do you have a source for this, or is this just your conjecture? Scratched the GPU!?!

Oh yes, I do have a source: me. This exact problem happened to my Wii and I had to have sent in to Nintendo to get it repaired. I had the on screen artifacts/pixels just like ocarinaoftime talked about. When I talked to the Nintendo representative, I told her I thought my system had damage from overheating (based on what I read online). Once they got the system, they told me no, it had not overheated. The GPU had been scratched, and I had never taken my Wii apart before. Nothing except dust had gotten in there.

Now, if you personally had a different experience with getting your Wii repaired, by all means post it. But if you don't have any such experience, you're in no position to say my explanation makes no sense whatsoever.

How can a GPU or processor be "scractched"

I had my wii on day one and this early model had this problem becuase of a bad design. My old wii had it and I saw it.
I didnt send it to repair because I already open it before to clean the disk reader lenses and I didnt want to pay for a repair (warranty was long gone)

Electronic components generate a lot of heat, usually a heatsink is installed on top of them to dissipate the heat (and some thermal paste in between). And a fan blows air into the heatsink to cool it. You can see this in work on any PC (easy to open and see)
You can find a lot of people talking about the wificonnect24 active all the time to be the cause, this actaully generate some heat and it may contribute but it is not the root of the issue.

When I completely open my wii I found that the heatsink wasnt even touching the proccessor and gpu. There was at least 3mm of space between them. They use some thick thermal paste that srunk overtime.
I modified the heatsink to be in contact with the GPU and processor and added some good new thermal paste. Some people got thier wii fixed this way but for me the issue was still there after doing all that so I guess the GPU was already damaged internally afer so many years of use