--- Tony Duell wrote: According to the Tech manual, the output from the VIC20 is composite video and line level audio. There was an external RF modulator that plugged into that socket and connected via a switchbox to the aerial socket on a TV, but if you TV has composite video inputs, etc, then there's no need to use a modulator. --- end of quote --- I posted the original question. There didn't seem to be any need for a switchbox since the TV has these inputs already. Tony, your earlier post (thanks, BTW) describes the pinout for the correct video connector. Except that, um, I don't know the pin numbering scheme you're using. So, in this summary of continuity checks, I am counting pins from left to right, not knowing any better: Pin 1 -- nothing. Pin 2 -- tip of black RCA connector. Pin 3 -- sleeves of both red and black RCA's. Pin 4 -- tip of red RCA. Pin 5 -- nothing. So I guess that pin 3's corresponding with both RCA sleeves must have something to do with the video signal's being present even when I switch them around, right? But I'm not sure what to make of the rest of it. The answer is probably staring me right in the face from your previous post, but I'm pretty ignorant about electronics, so please bear with me. ;) Thanks again for the help. -- MB