Resolving inverted image issues (upside-down screen) or distorted colors.
If a 2021 or later version is available, the TV will download and install it automatically. 2. USB Firmware Installation (Force Update) 3rt841b firmware 2021
if you tell me the exact panel model of your TV. an LG panel
The 3RT841B board uses a system called . The exact same board can drive a Samsung panel, an LG panel, or a BOE panel. The 2021 firmware contains instruction sets for all of them, but you must know your specific configuration. 3rt841b firmware 2021