My home theater system is ran through a DVD/VCR combo connected to an optoma ep719. The DVD quality is great. It is ran through an s-video cord. The image from the VCR for my TV reception has small vertical lines in it. They are hard to see but very noticeable on dark screens. The TV signal is sent through a sub woofer cable and connected into the composite jack on the projector. What can I do to eliminate this problem?