Black screen, but notification led flashes poco x3 pro

2 days ago, i opend tiktok on my phone and before it fully opend my phone got black. Since now its still black. Things ive tried to do are

-Charge the phone and try aigan

-Any sort of reset, phone doesn't boot into fastboot either

-currently in the process of draining the battery fully and using the led as a indicator to see if the battery is working

I dont know anything about repairing phones but all help will be greatly appreciated

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if you can remove the back, disconnect the battery and reconnect to see if that fixes the issue

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I dont have the proper tools to take off the back

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