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 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. Download MT5507 PB801 1920Г—1080 REF48 USB part4 rar
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". Move the extracted
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 . Only install this if your TV panel is exactly 1920×1080