problem with my iMac?
The screen on my iMac 27" keeps flashing black and it is getting more frequent. Why is it doing this? Is it likely to fail completely? How can I remedy it please?
I posted this before but nobody seems to have answered. Is there anyone out there who can give advice on this please?
iMac (27-inch, Late 2012), OS X Yosemite (10.10.1)