Unit does not respond to remote control

I had this same problem with the Onkyo TX-SR706 this evening, and finally found the solution in the "Controlling Other Components" section of the manual: Resetting the remote control did the trick. (P.S. This problem started after I spent many hours today trying to get my new Acer laptop equipped with a Hauppauge TV tuner stick to correctly display its image on my Samsung HDTV, with sound. I tried connecting the laptop via HDMI first to the Onkyo receiver and then directly to the TV, neither of which worked as it should. I assume that somehow, in all those hours of much plugging and unplugging and fiddling around, I screwed up the remote sensor -- thank goodness I eventually found the "Resetting the Remote Controller" solution a little while ago -- I was approaching the point of ripping everything apart and throwing it out the window!)