I had an old analog TV and got a Comcast digital cable box and a Roku box. I had a 3-way switch hooked up allowing me to switch between TV/VCR (device 1), DVD (device 2), and the Roku (device 3). It worked great. I could record to the VCR and easily switch between devices. I was using my Comcast remote to change channels, so I believe the cable from the wall was going to the Comcast box, not the VCR. To play tapes, I just pushed Play on the VCR while watching TV.
Now I got a new LCD TV, and everything got disconnected, and I can't get the VCR part to work any more. I have the 3 way switch plugged in to the AV1 on the TV. The Roku plugged in to Device 3 on the switch. That works fine. When I used RCA cables to plug the VCR to Device 2 on the switch and then to the Line 1 In on the VCR, I get a No Signal when selecting AV1 on the TV. Obviously I am missing a connection.
The new TV is an LG 47LW5300. It has Composite AV In 1 jacks (red/white/yellow), Component In jacks (2 series of green/blue/red for video and red/white for audio), and a single AV In 2 jack. Also an Ant/Cable In jack. Right now the cable is coming from the wall to the Comcast box.
Neither the Comcast nor the LG instructions exactly match my set-up, and I don't want to mess up the TV. Thanks for any help.
I'm sorry I've done a bad job explaining. The switch has 3 inputs and one output. The output is going to the AV1 input on the TV. The Roku and the VCR are plugged in to two of the inputs. I used to have a DVD player on the third input.