If you are downloading this file for a manual update, follow these steps to ensure a successful flash:
: Move the extracted firmware file (e.g., Update.img ) directly to the root directory of your USB drive (not inside any folders). Flashing the TV : Power off the TV and unplug it from the wall. Insert the USB drive into the TV's USB port. Download MT56552 LF1V339 part02 rar
: Use the TCL Product Download Tool and enter your TV's specific model number. If you are downloading this file for a
Press and hold the on the TV (not the remote) while plugging the TV back in. : Use the TCL Product Download Tool and
: If your TV can still boot, go to Settings > Device Preferences > About > System Update to check for the latest official software over the network.
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)