Hi! I'm wondering if this happens in all screen resolutions and color depths? You might try switching to a different resolution just to see. While unlikely the answer (due to the fact you've tried two different operating systems), I have seen machines go into odd screen resolutions when a DVD is played, or when external video is used (I assume to accommodate the limitations or specs of the external image). Also, I always do PMU and PRAM resets on malfunctioning machines, just to rule that out, because funky settings in PRAM can cause any number of problems. Hope that helps.

Try an other Inverterboard that controls the backlighting and so the flickering. Maybe some cables are on wrong position. Check temperature of the CPU with iStat Pro widget. Is there a flickering when you connect a Display to the DVI Port?

your anwer is,wait for it ........... there is nothing you can do about the

Apple guys diasbled the solution url for that problem because of the product line factory problem they failed to fix.and that is the reason why you no longer find them on the shelves,they were dicontinued for that same reason.Shame on you Apple