These boards have been removed from mostly new TVS with broken screens and should work if properly installed. SONY XBR75X900E TV LED STRIPS(36) SET NLAW00454S, NLAW00454L2,NLAW00454L1. Please verify that your board part number is the same as NLAW00454S, NLAW00454L2,NLAW00454L1. 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)