Navigate to > Settings > System > Software Update > By USB .
Keep holding the button until the indicator light begins to flash or the update progress bar appears on the screen.
Go to > System > Reset Shop (or Factory Reset ) and follow the prompts.
The TV should detect the file; select and wait for the process to complete (roughly 3–5 minutes). Method B: Hard Flash (If TV is stuck on logo or "No Power") Unplug the TV from the power source. Insert the USB drive into the TV.
Once the update is finished and the TV restarts, it is recommended to perform a to clear any old configuration data:
Depending on your TV's current state, use one of the two methods below: Method A: Menu Update (If TV starts normally) Plug the USB drive into the port of the TV.
firmware files on technical hosting sites like CFirmware or specialized LED TV software portals.