I have an Insginia 42" HDTV. I tried hooked up my Comcast box with HDMI cable. I went to select the correct imput on the tv and got No Signal floating around my screen. I know I hooked the cables correctly. There are only so many HDMI ports to pick from. What is this things major malfunction?
I have the exact same setup and issue. (42in plasma & Comcast). It worked just fine and then one day I had sound but no video feed. Tested the HDMI cable, and it wasn't the problem. Hooked the cable box up with component cables and it worked fine. Either the HDMI port from the TV went bad or the Comcast cable port went bad. How does one replace an hdmi port circuit board?
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the type of cable you use is important. i work for dish network and i have seen cables go bad. also tv's hdmi imputs go bad as well. i would call a technitian out to look at the system, have him try a new hdmi cable and in different ports to make it work. it may be there reciever or your tv.
When I hooked up my HD cable box using an HDMI cable, I had to go into the cable screen menus and select HDMI output. You may have to do something similar when using an S-video cable. Your DVD recorder doesn't seem to have an HDMI input, so you'll have to use the S-video or (worst case) composite video (red, white, yellow cords). Your cable box may also be scrambling the signal so that you can't record. That may be why you can record by bypassing the cable box.
I had the exact same problem on a brand new Insignia 26 " LCD with DVD. Comcast tech was able to fix it by changing the Comcast box diagnostics. Here is what he did. Using the Comcast remote with the TV on - press power, cable, menu in that order. A comcast diagnostic srceen will appear. Select Additional HDMI options, then audio options. Change the audio options to L-PCM. Press power again to exit the diagnostics. That will fix it and you get to use the HDMI cable.
I had the same issue... here's what I did. If power off your cable box, then press the menu button, there's a selection to enable or disable Closed Captioning. This works for both HD series Motorola boxes Comcast offers, at least in the Minneapolis/St. Paul area. Hope this helps!