I have a lot of electronics background and would dive in and remove the backlight LEDs if this had to be done. Or I'd go get some universal replacement remote.
I cannot disable the "nitelight" on my remote. I have not seen this Model number referenced on this site and am going through batteries frequently.
The remote Model No. is BN59-00849A and the tv Model No. is UN46B8500XFXZA. Can you help ?