Plug the flash drive into the USB 2.0 port on the TV board. Power On: Plug the TV back into the power outlet.
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 . Download MT5507 PB801 1920Г—1080 REF48 USB part4 rar
Ensure you have part1 through part4 of the firmware in the same folder on your computer. Plug the flash drive into the USB 2
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. Right-click on Part 1 and select "Extract Here
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.
The TV will scan the drive, find the file, and ask for confirmation to begin.
Do not power off the TV or remove the USB until the flashing stops or the TV restarts. This usually takes 3–5 minutes. 3. Alternative (Manual Menu Method) If the TV still turns on and has a working menu: Go to Settings > System > Software Update . Select Update by USB .