so i was trying to get my parents tivo box up and going. i have connected the coax from the wall to the tivo and composite cable(y,r,w) output to tv. i can see tivo gui(and detail of show thats on) but while the tv is on..i cant see the tv picture for some reason?! my cable service is not all digital because i can turn off tivo box and output a coax to tv and can see a cable tv picture just fine..but once i turn tivo back on...nothing. this tivo comes w/ basic lifetime service so i have guide up to 3 days and should be able to record like a vcr manually, which is all the parents need in sd quality. its not the composite cable because i've ran it from a cable box to tv(just for trial purpose) and it outputs cable tv pic just fine. however, right now im just trying to get a tv picture of say seinfeld to display while the tivo gui is displayed. it is on interlace mode in the back. there isnt a cable card on this older box btw. any suggestions?