Format a USB stick to FAT32 . Copy the extracted firmware file directly to the root directory of the drive. Local Update Method: Plug the USB drive into your TCL TV.
Plug the TV back in while continuing to hold the button until the "Upgrading" screen appears.
Many users find these specific files on the TCL Firmware Telegram Channel or XDA Developers. Download S586T02 LF1V628 part03 rar
Using incorrect firmware or losing power during the update can permanently damage your TV. It is often safer to use the Network Update option in your TV's settings to download official updates directly from TCL.
Use a tool like WinRAR or 7-Zip to extract part01 ; this will automatically merge and extract all parts (including part03) into a single .pkg or .bin file. Format a USB stick to FAT32
If you have already downloaded all parts of the archive, follow these steps to install the update via USB:
Press and hold the on the TV (not the remote). Plug the TV back in while continuing to
Verify that the "S586T02" and "V628" codes match your TV's Project ID and Platform found in your device's "Product Info" page under Settings. Installation Instructions