Turn off the TV and unplug it from the power source.
Insert the USB drive into the TV's USB port. Download MT5522S PC822 3840x2160 Skyline part03 rar
A red indicator light should blink, signaling the update has started. Wait until it flashes rapidly (often changing from red to green) before removing the USB and restarting the TV. Turn off the TV and unplug it from the power source