Move the extracted .bin or .img file to the root directory of the USB drive. Do not put it inside any folders, or the TV will not find it. 2. Installation (The "Auto-Update" Method) Most MT5507 boards use an automatic bootloader update: Power Off: Unplug the TV from the wall.
Ensure the power does not cut out during the update, as this can permanently "brick" the motherboard. Download MT5507 PB801 1920Г—1080 REF48 USB part4 rar
The file you are looking for relates to the universal smart LED TV motherboard. This specific firmware is designed for a screen resolution of 1920×1080 with a REF48 (likely 48Hz or a specific panel reference) configuration. Move the extracted
Use a tool like WinRAR or 7-Zip . Right-click on Part 1 and select "Extract Here." This will automatically combine all parts into a single usable file, typically ending in .bin or .img . This specific firmware is designed for a screen
Ensure you have part1 through part4 of the firmware in the same folder on your computer.
Only install this if your TV panel is exactly 1920×1080 . Installing 1080p firmware on a 720p (1366x768) screen can cause a distorted display or a "black screen".