"Fine update to the iMac...but with defective displays."2.0 starson by Cobalt Blue
Pros: Fast, well-designed and cost effective desktop.
Cons: This iMac, like the 27" model is plagued with display problems.
Summary: I am on my second replacement from Apple, and once again the display is defective. As with many other users, mine has a yellowish tinge that begins at the bottom of the display and fades upwards. Others report screen flickering and a whining noise. Apple support today could not confirm that any changes have been made or whether a fix is on the way. Apple is now hesitant to send me a third replacement and is encouraging me to accept a refund.
Best advice now: do not purchase a new iMac until Apple fixes this problem or you stand a very good chance of receiving a unit with a defective display, and either a series of replacements ending in a refund.