Hello, My Dell inspiron often shadowes my screen. What i mean is, that i can work on it, or play, or watch a video, and out of nowhere, the screen will turn black, but if i move to the sides, i can see some parts of the screen, like it is being shadowed. Sometimes it lasts a couple of seconds, sometimes it doesn't come back for hours. It is really disturbing and i wonder what causes this. Thanks!
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It sounds like the back light of your laptop is on the way out and you will need to take it to a repair shop to be repaired.