These boards have been removed from mostly new TVS with broken screens and should work if properly installed. TCL 65S423 TV POWER SUPPLY BOARD 08-L171WD2-PW200AB / 40-L141W4-PWC1CG. Please verify that your board part number is the same as 08-L171WD2-PW200AB / 40-L141W4-PWC1CG. 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)