Disclaimer: Modifying your phone’s firmware carries risk. The author is not responsible for data loss or further damage. Always backup your data before flashing.
A: That is the "disconnect/reconnect" loop. Your battery is too low. Let the phone charge via a wall charger for 2 hours, even if the screen is black. How to Unbrick XIAOMI Redmi Note 8 2021
So, you’re staring at a black screen. Your won’t turn on, or it’s stuck in a never-ending boot loop. Don’t panic. You have not turned your phone into a paperweight. Disclaimer: Modifying your phone’s firmware carries risk