green line on 2019 iMac screen
There is a thin green vertical line that suddenly appeared on my 2019 27-inch iMac. How do I troubleshoot the cause, or simply remove it?
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Is it still under warranty?
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.