Kee's is correct,

by mrmacfixit Moderator - 1/21/13 4:40 AM

In Reply to: i mac desktop screen issue by faspan

If this iMac was new when you purchased it, then it is still under warranty until the middle of 2013.

It would also be eligible for the AppleCare extended warranty at any time up to the day before it's one year anniversary.

Contact Apple, or your nearest Apple Authorized Service Provider and get them to sort it out.

Your local PC repair shop is not going to be able to do this under warranty, it MUST be an AASP business.