You typically only need to download and "flash" the if your TV is experiencing software-level failures that a factory reset cannot fix. Common indicators include:
The TV powers on but hangs at the manufacturer's logo indefinitely. 40-mt56s1-mae2lg Firmware
Most firmware for this board is flashed to the eMMC (embedded MultiMediaCard) memory chip. How to Update 40-MT56S1-MAE2LG Firmware You typically only need to download and "flash"
If you have obtained the correct .pkg or .bin file for your specific panel and board, follow these steps to perform a USB update: 40-mt56s1-mae2lg Firmware