Frequently the users will ask the similar question. There is Video but no Audio. Most of the time this issue comes from the Right-Connection-Of-VHS-Machine.
1. Make sure the VHS machine's Video Output is "VCR", instead of the only DVD or
2. The point of 1 also happens on S-Video Output Jack. (For example, there is only DVD Video Output.)
3. The S-Video only has Video Signals. 15