Question Laptop screen flashing

Aug 12, 2020
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My laptop screen is flashing every 2 seconds. I can still see the screen when it flashes it’s just much lighter. I’ve checked refresh rate, updated display driver, ran memory test, and all the things windows suggested. I also ran the dell diagnostic full tests and everything passed except all of the memory tests returned as “cannot run”. Event viewer also does not show results from windows diagnostic memory test.
 

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