stops work after I've installed cf card ide adapter
Hmmm... Well, are you sure that no part of the CF card adaptor comes into contact with any other circuitry in that area? The video circuits are right beside the IDE port. Is the metal shield still in place? Could it have bent in any way during installation?
Does the output work again when you remove the CF adaptor? Does the normal RGB output work (are you able to test it?)?
Edit: That adaptor Cammy listed has been getting excellent reviews - if your TV has S-Video on it, that could be an excellent upgrade!