I started my Lenovo Legion 5 15ACH6H and it has a blackscreen

[Windows Server]

Yesterday after coming from a friends house I had my laptop on my backpack and I left it on my backpack till the next day where I tried to start my laptop but it did turn on just it had a blackscreen and the keyboard was not working. In my friends house we just did a clean up of the ventilation of the laptop and after the clean up it was working just fine. Why is this happening and any help?

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