Hello, my name is***** to Justanswer! Give me just a few minutes to look up some specifics, I'm working on this now.
Do you still need help with this?*This is not your answer, just an inquiry to see if you still need help. I'm here to help when you're ready. Due to the nature of the problem, it may take a few tries back and forth before we finish the troubleshooting and fix the problem.
After reviewing your question, I don't think there will be anything we can do from here. There is a bad connection to your speaker, and a broken dock cannot be fixed by pressing a series of buttons, for obvious reasons. I would try a local electronics repair shop. Sorry I couldn't help more.