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Computer is on but screen black?

My laptop worked yesterday. Today I attempted to turn it on as usual, pressing the power button. It made all the usual noises. On startup, It makes a beeping noise, but that is normal. Today the screen is completely black. I can tell it’s on. The fans are running and the light is on. Still, the screen is black.

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DiamondWolf Gaming  connect an external monitor. If that works you know the issue is with your display. If it does not then it could be a GPU (motherboard) issue. Also while your computer is on, in a darkened room, shine a flashlight beam at an angle against the screen. See if you can make out your menu etc. If so you know it is a backlight issue.

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DiamondWolf Gaming さん、ありがとうございました!
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