I have a Sony DVP NC615 5 Disc changer which is pugged into a Radio Shack RF Modulator. I had basic cable but we upgraded to Digital Cable (box) and now the DVD player doesn't show the picture or audio on the TV. So the cable line comes into the Digital box then out to the RF Modulator, then out to the TV. Any ideas as to why I no longer have a picture or sound from the DVD player?
Are you saying that the coax cable from the wall goes to the digital cable box and then a 2nd coax cable goes from the digital cable box to the RF modulator?
The coax connects from the wall to the digital cable box; it then runs from the box to the rf modulator; then from the modulator to the TV. The DVD player connects form the player to the RF modulator. I hope this helps.
I have a Radio Shack modulator too for my old 13" TV that has just RF input.
I have it connected as you do, so I am not sure why you can't see and hear anything from the DVD player..
When the DVD player is turned on, the red light on the front of the RF modulator lights up. Otherwise, if the DVD player is off, I just see the cable channels on my TV.