: The standby light (LED) should start flashing (usually red/green), indicating the update is in progress. Do not turn off the power during this time.
: Place all extracted files (typically 5 files) directly into the root directory of the USB drive. Do not put them in a folder. Power Off : Unplug the TV from the wall outlet. Download MT5522S 3840x2160 Starsat part04 rar
Once you have the extracted files, follow these general steps found in technical service manuals for this board: : Format a USB flash drive to FAT32 . : The standby light (LED) should start flashing
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. Do not put them in a folder
: 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.