Installing the wrong firmware version for your specific panel (chassis) can result in a "bricked" TV or a flipped/distorted image. Always verify your chassis number (e.g., MT56552) matches the file exactly. How to Update TCL Tv by USB
If you are downloading this file for a manual update, follow these steps to ensure a successful flash: Download MT56552 LF1V339 part02 rar
Press and hold the on the TV (not the remote) while plugging the TV back in. Installing the wrong firmware version for your specific
: Once the progress bar hits 100%, the TV will restart automatically. Do not remove the USB drive until the TV has fully rebooted into the home screen. Finding Official Downloads Download MT56552 LF1V339 part02 rar