On the remote, does it have either a "input" or "tv/video" button? if not, try switch between the first and the last channels on the tv (see if it is there or not. Another way to do this might be to feed the dvd signal through the vcr (it may not be ideal but I think it could be done). Also I think they sell a video-to-RF(modulator) for people's tv that doesn't have any video input at all.
I am in dire need of help. I set my dvd player though color wires.(there is no coaxe option) I cant seem to figure out how to switch betwewen my inputs on this tv. I have contacted several people about how to do it but no one seems to know how. I talked to one person that said I might not have the original remote to the tv. But I dont know how to get an original because I dont think zenith sells this model of tv anymore...can someone please help me?