I'm not sure why it would have a coax input if it doesn't have a tuner. Can you post your TV make/model? Also, make sure the TV is set to Antenna or Air and not Cable. The default channel is Antenna channel 60. And yes, the remote TV needs to have a tuner. Also, I hope you're not expecting an HD picture at the TV2 location, because the TV2 is only ever SD quality. If you want HD, you will need to add a second receiver, which will then make your tuner issue moot anyway.