I bought this product a few years ago and never used it myself. I cannot find the users manual. I hooked it up to 2 of our TV systems and cannot get it to work. The CD will rotate then, I see no picture on the Tv, and therre is no sound. Then the scrren on the front of the Karoake machine displays "no" or "Er". What do I need to do to get the system to work properly? Any help you can give me will be appreciated. Thanks, Dotti Burke