The hdd in my iMac was failing and the optical drive was broken. Still covered under AppleCare, I took part of the day off work to take the 1.5 hour drive (plus paid the $4 tolls) to take it to the nearest Apple Store earlier this week. I happened to mention that there was a gray smudgy band running along the bottom of the display and they said, "oh we'll replace the screen, too.) They managed to fix it by the next day and I went all the way back today to pick it up. But the screen is awful, way worse than what it was. There are big smudgy swaths of gray. There is a vertical white line running down the right side, and it has widened and become two lines. And the bottom of the screen looks yellowish to me. I'm a photographer and artist, and this is totally unacceptable. Also unacceptable is making another two or more trips to get the thing fixed. What can I do?