Use a tool like WinRAR or 7-Zip to extract the files (usually named allupgrade_5522...pkg or similar) to the root of a FAT32-formatted USB flash drive .
Press and hold the Power button on the TV while plugging it back into the wall. Download MT5522S PC822 3840x2160 Skyline part03 rar
The file "MT5522S PC822 3840x2160 Skyline part03.rar" is a component of a for a Skyline TV (specifically those using the TP.MT5522S.PC822 motherboard Use a tool like WinRAR or 7-Zip to
Insert the USB drive into the TV's USB port. Download MT5522S PC822 3840x2160 Skyline part03 rar
). This mainboard is commonly used in various 4K (3840x2160) LED TVs, including brands like Asano and Shivaki. Motherboard: TP.MT5522S.PC822 Resolution: 3840x2160 (4K Ultra HD).
.rar (This is part 3 of a multi-part archive; you will likely need parts 01 and 02 to successfully extract the full firmware).