iMac 24" Wavy Screen!

[pisces03x]

I bought my first mac - a 2.93GHz early-2009 iMac - last year, and up until now it's been an awesome machine!

But I've noticed a really disheartening thing recently...this wavy-like effect is visible near the top-right of the screen by the disc drive whenever the mac is displaying a blackish background such as a screensaver. Sometimes, it's even visible when it's off.

At one point I thought this was dust, but that didn't make much sense to me. I was reading online that this could be due to overheating..if it is, that sounds like it should be something Apple would cover under warranty, right? Because it sounds like it would be a major repair.

Also, it seems that the screen has had a more yellowish-tinge in recent weeks...could this be from overheating? I have felt my mac get excessively warm sometimes, but I would immediately turn it off.

Help please! Hopefully others have had this and know what to do!

 

[ArcspacE]

What temperature figures do you get in istat?

 

[pisces03x]

Usually runs at 137 for the GPU after gaming for a bit, the rest hovering around 120. Ambient at 80.

Those seem high..?

 

[bumzo1]

I have the same model and those seem right. If your uber paranoid about overheating you can download a program such as iMac Fan control and turn up your fans

 

[PurrBall]

I rarely will see a wavy white line near the edge on mine in the location you describe but it's gone the next day.

If your screen is yellowing, then I'm pretty sure you can get it replaced since it's still under AppleCare.