The string refers to a specific firmware update file for the Polarine 43PL51STC-SM LED TV , which uses the TP.MT5510S.PB803 Go to product viewer dialog for this item. smart Android motherboard. Technical Profile TV Model: Polarine 43PL51STC-SM (often identified as Rev.1). Mainboard: TP.MT5510S.PB803
Power on the TV while holding the physical button on the TV frame until the upgrade screen appears.
If you are locked out of the system, you can try entering the using these common codes for Menu + 1147 Input/Source + 2580