Insert the prepared USB flash drive containing the full IMG firmware file.
You generally cannot. Roku controls the OS. If you need a manual update, you must contact TCL Support, give them your serial number, and they may generate a private download link for you if you are a developer or beta tester.
A USB drive formatted to FAT32 and at least 8GB of storage space. Download Tcl Firmware For All Models
The system will automatically scan the USB drive, detect the package, and prompt you to begin. Do not touch the remote or power button until the screen reboots to the home menu.
Type your Model Number (e.g., "55C835") into the search bar. Insert the prepared USB flash drive containing the
Download TCL Firmware for All Models: The Complete Smart TV Update Guide
Before downloading and installing Tcl firmware, keep the following tips and precautions in mind: If you need a manual update, you must
Keep the downloaded file inside its compressed .zip archive. Do not extract it. Rename it exactly to Update.zip if instructed by your specific chassis documentation, and place it in the root directory of the USB drive.
: TCL does not always publish every incremental update on their public websites; some updates are distributed via OTA to specific serial numbers. If you cannot find a newer version on the official site, your TV might not have a public USB update for that version yet.