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While holding the button, back into the outlet.

Open your TV back cover and verify the board number (e.g., TP.MS338.PB801 , TP.HV320.PB801 ).

If the screen is upside down or the colors look distorted after the update, you may need to access the : Code: Press Source + 2 5 8 0 on the remote.

Updating firmware is risky. If you use the wrong software, you can "brick" the TV (render it unusable).