Just a heads up, as I don't know the products or their video output/input options.
If applicable, check that you don't have an S-Video output connected to a CVBS (Composite) input or vice versa. Have S-Video Out goto S-Video In or CVBS Out to CVBS In. You must also have any menu option for video in/out to match each product. Otherwise you will end up with no colour.
Any options to change these will be within the product menus under Video Output Settings.
Cobweb, May 2005