Help - Cannot get correct IR code to enable for both Volume control and TV off/on function. I have a 13 yr old Samsung LN55B640 and a new Roku Streaming Stick 4K. Under IR pairing I can get a code to turn tv on/off but no volume control. Under a separate pairing code I can get the volume to work from remote but not the TV power. I cannot find the one code to allow both functions. All this worked fine under my old Amazon fire stick yesterday with no problem.