Okay folks, being a newbie to the world of the iMac, what happens when the unit is returned to Apple for a repair for the yellow tinge on the screen. I have just bought a 21.5" iMac (November 09)and have noticed that the bottom right of the screen is slightly tinged. With a PC when the screen goes you just throw it away & buy a new one, so do they just replace the screen he same.