A common repository for board-specific firmware. You can find entries for the TP.MS638.PC822 board here.
Offers a dedicated download section for the TP.MS638.PC822 board.
Download all parts and extract the .bin or .img file using a tool like WinRAR.
Hold the on the TV (not the remote) and plug the power cord back in.
If you are using the USB recovery method, follow these general steps: