What happened to my computer?

Hello, my computer has been sitting here for a while, like 2 or 3 years, I left it stored, because the last time I turned it on, it had a black screen, with nothing, but the lights indicated that it had turned on, none appeared right away, it turned on straight away, I think there is a problem with the monitor. If possible, can someone help me please?

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Miguel, try plugging in an external monitor to your laptop; if you're having a screen issue the external monitor will still work; if it doesn't work on there it could well be a GPU problem.

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