My iMac has been dimming down periodically and has now blacked out completely . I am still getting a noise when I touch return or the start button. Any ideas on how to get it back on?
My iMac has been dimming down periodically and has now blacked out completely . I am still getting a noise when I touch return or the start button. Any ideas on how to get it back on? Last use 30 mins before writing and display was coming and going at the end before complete blackout.
iMac (27-inch Mid 2011), iOS 7.0.6
