Quote Originally Posted by mainecoon lover, post: 189321
Yes same as when on battery
ok well try resetting the SMC first but if no go, take it to the apple store genius bar and get them to check it out. It could still so easily be something that I'd notice in an instant if it was in front of me, but if not, it sounds to me like a dodgy backlight/inverter. Either way, they'll sort it out for you