Hi All, My 2010 iMac has started to have an issue when it wakes from sleep. It does not happen every time, but has happened twice in two days. The screen is completely screwed up on both the iMac and my secondary screen. See photo. I am not able to access the machine via Screen sharing, but I can access my shared folders. The only way to fix it is via the power button. I have tried a PRAM reset, but has not helped... Failing video card? I have made a Genius bar appt for Monday, but would like to know if anyone has any thoughts to compare to the genius. Cheers.