[Power Off TV] ➔ [Insert USB] ➔ [Hold TV Power Button] ➔ [Plug in Power Cord] ➔ [Release on Flash Screen]
If your TV won't turn on, follow these steps to force the update: Unplug the TV from the power outlet.
You should perform a USB firmware flash if your TV experiences any of the following software corruptions:
Copy this file directly to the of your USB drive.