Why won't xiaomi start?

Question

Android

I haven’t seen this before, after the firmware the phone does not turn on and the black screen, while it reboots
. It just vibrates, and nothing appears on the screen and I can’t go anywhere in recovery and fastboot.

And another moment, I connect the phone to the laptop, it does not see anything, but if you press all the buttons on the sides, then for a couple of seconds in Windows it shows that a new device is connected and turns off again