Keep holding the button for about 10 seconds until the "Software Upgrading" screen appears.
: Use a tool like WinRAR or 7-Zip to extract "part01". It will automatically pull data from part02 and others to create a single .pkg , .bin , or Update.img file. Download MT56552 LF1V339 part02 rar
: 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 Keep holding the button for about 10 seconds
The file is a specific firmware part for TCL Smart TVs (often associated with the MS08B chassis). Because this is a multi-part archive, you must download all parts (e.g., part01, part02, etc.) and keep them in the same folder before extracting . How to Install Firmware (USB Method) : Once the progress bar hits 100%, the
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
: Use the TCL Product Download Tool and enter your TV's specific model number.