Black screen with dotted white line across the top - Windows 11

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TAH1288

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Hello,I am getting a black screen with a dotted line across the top (white hyphens) that does not respond to any keys or actions. I sometimes get this after I've been using my laptop for a few hours, but am now experiencing this numerous times when trying to wake up my computer after sleeping. If I restart the computer, it usually helps - but as the problem frequency is increasing, I am worried.HP 15 LaptopProcessor Intel(R) Core(TM) i5-1035G1 CPU @ 1.00GHz 1.20 GHzInstalled RAM 12.0 GB (11.7 GB usable)Can anyone help? I am using Windows 11. Thanks

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