My panasonic dmr-e75v dvd/vhs pla...

My panasonic dmr-e75v dvd/vhs player/recorder is suddenly baffling me: although I CAN playback a DVD (I never handle VHS anymore) when I get the WHO/INPUT right, and I can see all the sessions of recordings on one screen as usual, if I close that, I get the blue screen saying something like "no input" or the like... so I cannot RECORD ANYTHING. I can browse thru channels via my cable box remote as usual, but I can't seem to find the setting that allows both that and recording.

This is my setup:
Wall to
cable box to
DVD/VHS
TV

I have a video/audio 3 pronged connection somewhere, but I'm not there right now and can't rememember. I made NO CHANGE to my connections, though, between it's working normally and now it's failure.

Please give me a bone here. :)