I just received my iMac C2D 2.0 with 20" screen. After booting it up and leaving it warm up for 20 mins, a green stuck pixel appeared in the upper part of the screen, especially when the back ground is black. When I switched to FrontRow, that green pixel is very shining and remains there.
Does anybody know how to deal and fix this problem? This brand new iMac changed my feeling about Apple. Anybody has the similar problem with me? I need your guys' help!!!
Bad as in your upset with Apple for the dead pixel? In response to that I would say ANY lcd screen is subject to dead/stuck pixels. The go dead/stuck when they feel like it AND on the best LCD's as well.
Now onto fixing it. If it's "stuck" there are several methods, the rubbing it out which on the new iMac's can only happen if you remove the glass so if that's the case your out of luck on that method.
Another method is there's a little program thats been linked here in the forums and google is your friend here that runs a small version of iTunes visualizer in a small window. You place that window over the dead/stuck pixel. If it's stuck it may unstick but if I'm not mistaken the documentation says to run it for a while and the pixel may not unstick within minutes and might take overnight to work.
The basic premise for that method and others like it is to force the stuck pixel to change colors to unstick itself.
If the pixel is DEAD then that's another issue. If your within your 14 day window you can return it to Apple no questions asked.
However if your not keep in mind there is an "industry standard" regarding dead/stuck pixels. According to Dell they go by 9pixels in a cluster THEN it would justify a replacement. Dell HAS replace my laptop lcd 3 times, 1st was due to screen issue, 2nd was for 1 dead pixel, 3rd was for 1 dead pixel 4th had a dead pixel and they finally said "no, sorry" since it is to expensive to replace and they've done enough freebies and have to adhere to the industry standard now.
So if Apple refuses (even if your under warranty) don't get to upset. If they do (if your under warranty) then be grateful.
More than likely it's just stuck and an unstick program will probably fix the issue.
5sec google yielded these results:
https://forums.macrumors.com/threads/149027/ (see post # 6)
http://www.macupdate.com/info.php/id/20962
Good luck