How To Unbrick Redmi 14c
If the screen is black and the phone does not respond to button combinations, it is likely in mode (for MediaTek chipsets like the Helio G81 Ultra in the Redmi 14C).
If Recovery Mode fails or you are stuck on the screen, you must flash the official stock ROM using a PC. Prerequisites Downloads - Xiaomi Community How to Unbrick REDMI 14C
Sometimes the system just needs a kick.