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Diesel450

macrumors newbie
Original poster
Hi Folks, new here, looking for some tech advice. Screen on my 2020 machine suddenly went all scrambled. I managed to get in to it and load Monterey which got it to the point. Where I have a bar of lines bisecting the screen. Funny thing is that if I take a screen shot of this screen it does not show up! What can I do to fix this? Thanks!!
 
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