: You cannot use part04.rar on its own. To successfully extract the firmware, you must download all parts (01, 02, 03, and 04) into the same folder on your computer.

Technical communities like KenotronTV often host these specific firmware dumps for technicians. Always ensure the panel model (e.g., HV550QUB) matches your TV’s internal sticker to avoid upside-down or distorted images after flashing.

: Hold down the Power button on the TV (not the remote) and plug the TV back into the outlet.

The file is one component of a multi-part firmware archive for Smart TVs using the MT5522S (typically the TP.MT5522S.PC822 ) mainboard . This specific board is widely used in various 4K (3840x2160) TV brands, including Starsat, Asano, and Skyline. File Overview & Extraction

allupgrade_5522_8G_1G_ref56_MD5.txt (Checksum for file integrity) manifest.xml and app_declare.txt How to Install the Firmware via USB