Solved I Have A 30 Version And Dark Wavy Lines Have Appeared On The Screen Apple Cinema Hd Display

Chosen Solution

the lines do not appear on a screen grab and do not clean off????

@yeltep looks like bad diffuser sheets. It is physical part of your display and thus won’t show on a screen grab. you could try and see if you can disassemble the panel and replace the sheets or you may need to look toward a replacement panel.