Firmware Update On Xiaomi Mi Tv 4a Pro 43 Portable =link= Here

If a new update introduces bugs, you might want to revert to an older version. Downgrading erases all data and can brick the TV if the bootloader is locked. Only attempt using the USB recovery method with official older firmware.

The "Portable" label adds complexity. This TV uses a customized power management unit (PMU) to switch between AC and battery. A generic firmware flash designed for the standard Mi TV 4A Pro (non-portable) will brick the device immediately, as it lacks the driver for battery management. firmware update on xiaomi mi tv 4a pro 43 portable