May sound nuts but some of these sets went to AUX or video by selecting channel 91 on the remote. I know it sounds nuts. Also, CTC203 chassis if originally set up and no VCR or cable box was selected on the seetup menu, would lock out the video inputs. Drove some customers crazy. Also, be careful, if you select "cable box" on the menu, it may lock you on channel 3 or 4 (whatever you selected during the setup). The engineers behind the software on these sets had a bit of a masochistic streak
