These boards have been removed from mostly new TVS with broken screens and should work if properly installed. SONY_XBR75X850F TV LED ASSEMBLY W/LEDS ST0750A22_56LED_REV03_171031 / SD5665B3F27B3F. Please verify that your board part number is the same as ST0750A22_56LED_REV03_171031 / SD5665B3F27B3F. The part number is the first number left of the /, or the sole number listed. Most often written in title as (part number / board number)