While holding the button, plug the TV back in. Keep holding until the "Software Upgrading" screen appears.
are often hosted on community forums rather than the official TCL Support page, ensure you have both parts before attempting extraction. Download and Extract :
: If your model has smart features, you may be able to update via Settings > Device Preferences > About > System Update if the TV is connected to the internet. Download TCL LED40D2939 Firmware part2 rar
Place both part1.rar and part2.rar in the same folder on your computer.
: If you only have part2.rar , the extraction will fail. You must locate part1.rar from the same source to successfully rebuild the firmware file. While holding the button, plug the TV back in
Wait for the progress bar to reach 100%. The TV will usually restart automatically.
: If community links are broken, you can try contacting the TCL After-Sales Team with your specific serial number to see if they can provide a direct download link. Download and Extract : : If your model
Use a USB drive (ideally 8GB or smaller) formatted to .