Archive. This is an archive of the Apple Support Community. Discussions are being restored and soon you will be able to read and post here again.

Thin blue line on the screen of my iMac

I have a thin vertical blue line on the screen of my iMac that won't go away. Any fixes?

4 replies

Take a screen shot & view that in Preview, move the Preview window around, if you see double lines it's a Video card/VRAM problem, if the lines do not move moving the pic around then it's the LCD or cable.

Then it's the screen, den.thed has the advice on that.

Thank you. It doesn't appear in the screenshot.