iMac has random black screens but works fine in Target Display Mode?
I have a 2010 27" imac. It has the latest OS on it and has always worked fine. In the last week the screen has started going black randomly. If I shine a torch at the screen I can clearly see the computer is still on and working fine, just with the backlight out.
I also have my gaming PC plugged into the iMac and have been using as my monitor for years. When I command F2 and go into target display mode with the PC, the imac works flawlessly as a monitor and the backlight stays on all the time.
If I swap back to the iMac the screen will be on but normally only for a few minutes before it blacks out again.
I am puzzled and hope someone out there has an idea what this could be.
Thanks in advance.
Is this a good question?