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Hello and welcome to JustAnswer, I look forward to assisting you today. Did your display just go out or was it gradual?
Do you by chance have another monitor you can connect to check the video processor?
Let me know if you are able to connect another monitor and the results please.
One thing you can try is place a flashlight right on the screen and see if you can see any of your desktop icons. If you can, then that means your backlight has failed and will need to be replaced. Let me know please what you find.