No the Samsung upstairs is an older model h2200. Downstairs is a new q7f model.
Update. I have managed to fix it. Basically I had to cancel the process my TV goes through to identify my rpi3 as a hdmi connected device (using the universal remote process) and then the remote magically works. That's several hours of my life I will never get back.
Thank you for your help chewit.
I know this thread a bit old but im having the same issue with my Samsung NU8000 TV and getting LibreELEC on my RPI3 to work with the TV remote. What device did you select when setting up via the universal method as there nothing like a RPi listed to select?