: Can be applied via Local Update (USB) or, in some cases, OTA (Over-The-Air). Installation Guide (USB Method)

: .7z (a high-compression archive that must be extracted to retrieve the .bin or .img firmware file).

: The TV will restart automatically once the process is finished, which usually takes about 4–10 minutes. Important Precautions Software Upgrade - TCL USA

To install this firmware manually, you typically need a formatted USB flash drive and access to the TV's service settings. : Format a USB drive to FAT32 .

: Turn off the TV and unplug it from the power source.

: Plug the drive into the USB 2.0 port on the side of the TV.