Apple recently launched a replacement program for the graphics card in some mid-2011 iMac configurations according to the folks over at 9to5Mac. A recent note sent to Apple Support employee’s states that the AMD Radeon 6970 video cards in some 27-inch May 2011 iMacs have experienced issues causing them to fail.
Apple has determined that some AMD Radeon HD 6970M video cards used in 27-inch iMac computers with 3.1GHz quad-core Intel Core i5 or 3.4GHz quad-core Intel Core i7 processors may fail, causing the computer’s display to appear distorted, white or blue with vertical lines, or to turn black. iMac computers with affected video cards were sold between May 2011 and October 2012.
Those of you that have been affected or know someone who has can initiate replacements through AppleCare, the Genius Bar, or Apple Authorized Resellers. Those of you who ended up paying for a graphics card replacement are also eligible for a refund so if you fall under the category of affected users and you ended up paying, we’d recommend getting in touch through your preferred channel to get the issue resolved.
Source: Apple via 9to5Mac