Once you have the extracted file (e.g., allupgrade_5522_8G_1G_ref56.pkg ), follow these steps:
: Using the wrong firmware can permanently "brick" your TV. Double-check that your TV's mainboard model is exactly TP.MT5522S.PC822 and matches your screen panel type before proceeding. Download MT5522S PC822 3840x2160 Telefunken part10 rar
: Copy the extracted firmware file directly to the root of the USB drive (not inside any folder). Flashing Process : Power off the TV and unplug it from the wall. Insert the USB drive into a USB 2.0 port. Once you have the extracted file (e