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I just bought a Denon AVR-3803. When I plug my digital Time Warner cable box into the receiver via s-video (or composite) and run out the receiver as component, I get a green stripe and a violet stripe that run up my screen. The image looks find beyond this interference. I am pretty sure it has to do with upconversion, because I don't get this when I run my DVD player component cable into receiver and component out (thus no conversion). To verify the source, I plugged my DVD player in using s-video, and the green/purple lines appeared. I've unplugged the cable line thinking it may be the interference, but doesn't change things. If I do s-video in from cable box, and s-video out from receiver, there are no lines.What is the solution???? This is very frustrating since one of the reasons I went with the unit was for the upconversion and ability to minimize cables.
Thanks!
Brian
Follow Ups:
You have a ground loop problem, which the 3803 is known for being particularly sensitive to this in upconversion. See http://www.avsforum.com/avs-vb/showthread.php?postid=2984599#post2984599 for more info (or search the forums for other references, there are many). Your dealer can perform a mod recommended by Denon if you have an earlier model, but I'd make sure you are doing everything you can to deal with the ground loop issue first and see if that solves your problem.... rjs
FYI, I sent my receiver back to Denon under warranty and they fixed the power supply. I believe they had to upgrade the video ground. The interference lines are gone, thank goodness and no ground loop problem.
Many receivers, expecially the mid to lower lines, don't upconvert; they simply act as video switches. You can check this out by using an S-video out cable with the s-video in cable and if the picture is clear...Good Luck...
I don't have one, but it sounds like the Denon is defective. Return it for another unit... or look into warranty repair.
Charlie
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