im talking about the late 08 macbook unibody (not pro). 2.4\4gb\9400\ocz ssd\ snow leopard I can barley use my macbook for more then 15 minutes without getting eyetrain. The screen looks too bright even if i put brightnes to 50%. The white and the grey colors looks flickering, and if you look at the dock icons they look like at low refresh rate, ( hz). i know that the lcd should work around 60hz but looks more like 30hz. On the first 2-3 min everthing looks fine but after awhile you think that every pixel on the screen is moving and jumping. i calibrated the display using spyder 2, and also tried switchresx software,rest smc pram and vram, but didnt work. my screen model is 9CA6 (samsung) i think the problem is with the 9400m and not the led lcd because i can see(not that worse) the problem on my samsung t220 and MAG bf22 lcd's. apple already replaced 2 logic boards and now i got a whole new macbook from them but the problem is stiil there. is there anything to do? i spend 1400$ on this machine and its driving me crazy.