These boards have been removed from mostly new TVS with broken screens and should work if properly installed. TCL 65S451 TV MAIN B0ARD 30800-000498 / 40-MR17T5-500506. Please verify that your board part number is the same as 30800-000498 / 40-MR17T5-500506. 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)