Don't think it has anything to do with your remote. Think you are finding out what the rest of us with Samsung TVs have found. CEC (and ARC) is sporadic on my setup, Samsung UN55D6000 to Yamaha RX-V867 (through an 1.4a HDMI cable, yea that's how far I went). I have to cycle the HDMI CONTROL (set to OFF then to ON) on the AVR every time I power up the TV. Tech support from both companies have blamed the other. I borrowed a friend's Samsung AVR and that setup works fine. My suspicion, Samsung does not play well with others.