These boards have been removed from mostly new TVS with broken screens and should work if properly installed. SONY KD55X80J TV CONTROL BOARD HV550QUBN5M / 47-6021164. Please verify that your board part number is the same as HV550QUBN5M / 47-6021164. 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)