I have Time Warner cable service with a Scientific Atlantic Explorer 8300HD as the DVR/cable box. I can control the box and do all functions with the Sony remote except power on/off. I am able to power on/off the TV and Home Theater box but I have to manually turn off the cable box. Is there any way to program another key or make a macro to perform this with the Sony remote? BTW, I can use my tablet and Able Remote to perform this, but would like to be able to just use the included remote.