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DVD/XBox signal problems - Coaxial Cablebox input OK

I have purchased a used a 65" Mitsubishi WS-65869 rear-projection HDTV. I hooked up my non-HD cable box directly to the TV via a coaxial cable. Signal is OK, everything works fine.
When I hook up my DVD player using analog audio and video cables, the TV reports that there is no signal from the selected input. (On this TV you name your device and then assign the input port when the signal is coming in.)
Then, I tried to hook up another DVD player that has component video output. This time the TV did not report that there was no signal, but there was no sound and the TV showed a slightly tilted greyish pattern moving from up and down.
Then, I tried to conect an XBox via analog cables. Again, no signal.

Has anybody encountered a similar phenomenon? Any troubleshooting ideas?

Thank you!

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Too bad you didn't get the manuel.

In reply to: DVD/XBox signal problems - Coaxial Cablebox input OK

That may have given you a bit more info. It has been my experience that component connection may require setup for the tv/dvd or both; but composite signal (AV) doesn't require any setup. Could it be that it is defective (just think out loud). How about the s-video?Sorry I can't be more helpful.

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Still no DVD/Xbox

In reply to: Too bad you didn't get the manuel.

I may get a manual tomorrow. But I doubt it will solve my problem. The setup is pretty intuitive based on the menu.
To answer your question about the s-video, it does not work either Sad
If any tv technician is reading this, I have a question fo them: is there a circuit responsible for all analog/component/s-video input and a separate one for the coaxial?

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lemme get this straight...

In reply to: Still no DVD/Xbox

you have this huge new tv & you can't get any picture displayed on it? either its something small like a video setting in the options menu or that thing is broke.

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