Corrupt download file or incorrect firmware region/model mismatch.

If your TV is unable to check for updates online or you wish to use a specific firmware file, you can perform a manual update using a USB drive. A popular source for official firmware collections is the forum "right.com.cn", which has a post titled "小米电视系统升级官方固件合集大全" (Collection of official firmware for Mi TV system upgrades).

Guide: Updating Firmware on XIAOMI Mi TV 4A Pro 43 Keeping your updated is essential for accessing the latest security patches, fixing performance bugs, and unlocking new features like improved sound parameters or official app support. Updates have historically brought major upgrades, such as moving from Android 6 to stable Android 9. Method 1: Automatic Over-the-Air (OTA) Update

Fixes known bugs, random restarts, and app crashes.