i have a mi 11 lite 5g, i was watching tiktok when suddenly the speakers made a buzzing noise for a milisecond then the screen went black, it vibrates if i long press the power button, i cant enter recovery or fastboot, device is not shown in device manager on windows, i oppened the back and reconnected every connector and it still does the same thing, xiaomi assistance cannot help without imei nunber and it is out of warranty.

how do i fix this?