iMac won't turn on
I have a mid-2011 iMac which was showing vertical lines all across the screen. The only way to move beyond it was to press and hold the power button. Now, with a normal press on the power button (after waiting a minute or so), it won't start: black screen, no opening "bong" or other noises or lights. Also tried disconnecting from power altogether (pulled the plug) and it still won't start. Suggestions?
iMac Line (2012 and Later)