The service manual will identify the SPI flash chip (U12, 25L3206E, etc.). Symptoms of corrupt firmware:
Always unplug the set before replacing components. Overloading outlets or damaged cords can lead to fire or shock i0qcqTgZ4fR27dTw89iYG4RI9Tx5tf0IWhA4eWcC.pdf . tsumv56ruu-z1 service manual