Black but backlit screen 2011 iMac
I have a mid 2011 21.5” iMac. It will turn on but there is no image displayed on the screen (it is blank but backlight is working) And via the Mini display port I am able to view the iMac screen on an external monitor. I have checked everything inside and all 4 diagnostics lights light up so everything should be working.
Any ideas to do what’s wrong? Anything helps.
Is this a good question?