Tp.mt5522.pc821 Firmware -

(usually named allupgrade_5522_sos.bin or similar) to the root of the USB drive. Insert the USB into the TV while it is unplugged.

(Windows):

(found on the back of the set).

Firmware for this board is not universal; it is highly specific to the panel it drives. A mismatch in firmware can lead to "hanging on logo" errors or inverted/distorted images. Tp.mt5522.pc821 Firmware

System apps or Google Play Services stop working. (usually named allupgrade_5522_sos

USB Firmware Software - Обновление ПО USB - KenotronTV Tp.mt5522.pc821 Firmware