I've connected my Roku Express to the TV's HDMI 2 input and when I switch to that input the Roku works fine. My problem is when I switch back to HDMI 1 (which is my cable box) with the tv controller, any button I press on my cable box remote brings back the Roku menu. I can't operate the cable box with the Roku connected to the HDMI 2 input. Any help would be greatly appreciated.