Faint "scan" lines moving across screen
I have a fully original gameboy that up to this point has operated perfectly and has never been abused. Today I noticed what looks like faint darker contrast lines moving slowly upward across the screen. Like the effect you see when shooting video of an old crt screen with a video camera (but not so extreme). Here's a link showing it. I am adjusting the contrast to show how it becomes more noticeable the darker the contrast goes.
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