These boards have been removed from mostly new TVS with broken screens and should work if properly installed. TCL 43S431 TV POWER SUPPLY BOARD 08-L12CLJ1-PW200AA / 40-L12CH4-PWF1CG. Please verify that your board part number is the same as 08-L12CLJ1-PW200AA / 40-L12CH4-PWF1CG. 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)