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Download the correct firmware file (usually named MstarUpgrade.bin ) from a trusted source like the TCL Support Page or community forums.
There are two primary methods to update this specific board. 1. Standard USB Update (System Working) If your TV still powers on and you can access the menu: 40-ms801a-mac2hg firmware
The TV will detect the file and begin the installation. during this process. 2. Forced USB Update (For "Bricked" TVs) If the TV won't boot past the logo: Unplug the TV from the power outlet. Insert the USB drive containing the MstarUpgrade.bin file.
While holding the button, plug the TV back into the power outlet. Navigate to
In severe cases where USB updates fail, technicians may need a "NAND dump" file and a hardware programmer to flash the chip directly.
Format a USB drive to and copy the .bin file to the root directory (do not put it in a folder). Insert the USB into the TV's USB Port 1 . Understanding the 40-MS801A-MAC2HG Board If possible
Maintaining your TV’s performance often starts with the heart of its hardware: the motherboard. If you are working with the motherboard, commonly found in TCL Smart TV models like the L40S4690FS or L48S4690FS , obtaining the correct firmware is essential for fixing software glitches, boot loops, or system slowdowns. Understanding the 40-MS801A-MAC2HG Board
If possible, backup your current settings, though a firmware flash will typically factory reset the device.
Ensure pre-installed apps like Netflix or YouTube run without crashing.