Sony KV-32S42 doen't recognize Pioneer DVR-231 as a video input

I have just moved my satellite receiver and DVD recorder to a new cabinet and upon reconnecting everything, I can no longer access the DVD recorder using the TV/VIDEO button on my Sony KV-32S42. The TV recognizes the satellite receiver as Video 1 but I get only snow when I select VIDEO. How can I set the DVD recorder as a 2nd input to the tv.
All connection are as specified in the TV and recorder manuals.