This is not very elegant, but it works for me. See picture below.
I have 2 different Samsung TV's in the same room, one is used for my PC monitor and the other is a 40" Smart TV.
Every time I was trying to control one TV it was also affecting the other.
I put a little piece of plastic tube around the IR emitters of the 2 Samsung remotes to make the beam more directive. That solved my problem of interference. I'm sure Samsung can use this suggestion and solve this in a better way by building the plastic housing of the remote to narrow the angle of the IR beam.
In my case I will make an little extention with a hole on the tip of my remotes.
Had same problem with the smart remotes that came with my Q7 and Series 5 32" - using either remote turned on/off both TVs. I contacted Samsung support - their only solution was to move one of the TVs so that it was further away (not an option due to location of aerial). Solved the problem by putting duct tape over the end of each remote. I am guessing that this reduced the signal enough that only the TV in the room where the remote was being used responded to pushes of the power switch.
I have two of the same model Samsung SMART TV's. What doesn't make any sense to me is that the Power button from either remote will power on/off both sets, but that's the only function they share. Once powered on you have to use the remote that came with that specific TV to change channels, adjust volume, etc. Why are the remotes independent except for the Power button?? Makes no sense. Drives me crazy because the sets are in the same room and I have to walk up to each TV and hold the remote an inch away to turn on/off each set so I don't affect the other set six feet away!
Completely agree. This is driving me crazy. I have a KS8000 (2016) and an NU8000 (2018) and the only thing that the remotes share is the power button.
If I use the KS8000 remote, it turns on BOTH Tvs. If I use the NU8000 it ONLY turns on the NU8000. Therefore, I am unable to turn on the KS8000 without turning on both. Using the smartphone app doesn't help because it only connects to my NU8000.
Roku turns on both. It's a nightmare.