The indicator light should begin flashing, signaling the update has started. Wait until it finishes (the light will flash rapidly or change color) before unplugging the TV and removing the USB .
You can find the firmware files and update instructions on the following platforms: : This is a primary source for MT5522S.PC822 Download MT5522S PC822 3840x2160 Telefunken part09 rar
: Download all RAR parts (part01 through the final part) into the same folder. Extract part01 , and the software will automatically combine all parts into a single file, typically named allupgrade_5522_8G_1G_ref56.pkg . The indicator light should begin flashing, signaling the