Check the silly obvious stuff first! It could be in standby/sleep mode! Tap the shift or CTRL key and see it comes to life. Is it plugged in to charge? Some laptops use the power light to tell you it's charging. Is it fully unfolded? It goes to the standby screen once you close it past half way. If it still stays black it might be worth getting it looked at by a repair shop.
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Check the silly obvious stuff first! It could be in standby/sleep mode! Tap the shift or CTRL key and see it comes to life. Is it plugged in to charge? Some laptops use the power light to tell you it's charging. Is it fully unfolded? It goes to the standby screen once you close it past half way.
If it still stays black it might be worth getting it looked at by a repair shop.