: Insert the USB into the board's USB port while the TV/board is off.
Based on the naming convention, the typically refers to the Tuya TR6703 Smart Thermostat (often manufactured by companies like SASWELL or MOES). It is a touchscreen thermostat used for water heating, electric heating, or gas boiler control.
The (often associated with model T.R67.03) is a common software/firmware for universal LED TV mainboards. A key feature of this software is its multimedia playback support via USB , which allows users to play various audio and video file formats—such as Mp3, WMA, and M4A—directly from a flash drive. Other notable features of this mainboard software include: