My Teddy Ruxpin does not play cassettes properly, please Help!

Jack Johnson this "When I tap the volume dial,lean it against something, or just fidget with it , the sound comes back" sounds like a bad potentiometer. It may be gummed up, same with your cassette drive. Time to tear it apart and clean it all with some 90%+ isopropyl alcohol. Check the pinch roller, playback spring and drivebelt on your cassette player. Use this video and an excellent refurb of Teddy Ruxpin. It's a series of 4 and goes over all the details start here for that. If unsure post some pictures of what you get with your question. Use this guide Adding images to an existing question for that. It will allow us to see what you see.

ive had a teddy like this before. one of the wires for his volume wheel aka power wheel is off and it needs resoldering again.

Okay what you need to do is turn off the power and use an exacto knife and cut into the back of the head Where the Fur is and kind of take that off and then take the big foam part off and you unscrew the screw that you see and then you take it out and you replace it with a new screw and then you work the eyes for a minute and then put that foam part back on and then put the fur back over his face and sew it back up