My MacBook is showing a lot of colored squares/pixels on the screen when its half way booting. I can start up from recovery disk, surf safari there, use disk utility, install new system, everything is working fine. But if i boot it, then just half way the process it starts showing colored squares. I can login and work but pixels stay there. Even if i remotely take over the macbook its showing the pixels remotely, so it must be software thing, if it would be a hardware problem it would not show up on my remote screen i guess. Can anyone help me figure this out?