iMac 2011 with a biggest problem
Hi
I have a iMac 27" from 2011 and yesterday i have a problem, when i work in images in full screen, my screen is going crazy, first frozen and after that its appear lines in horizontal (i think is in horizontal not vertical).
So,i need to turn off the computer by the power button (i try to turn off by keyboard but don't work). After that i turn on the iMac and everything works fine, when i start working again in images the iMac have the same problem, so i turn off.
Today i'm trying to turn on and the iMac is rebooting, ( i leave a video to show in few moments) , and stay making this ever and ever again.
Im trying to diagnosting the problem with the key D but i can't enter, still a long time in grey screen and after that enter with Apple logo.
The iMac is out of warranty but i like to know if is enable to replacement program, because i think is the graphic card.
iMac, OS X Yosemite (10.10.1), 2011