I purchased this at a goodwill and the audio wont play, I suspect the speaker is damaged or a wire is broken. I have attempted to open the product with no luck. I have found all screws, even the ones under the rubber feet. I have been using a pry tool to try to remove the back, with no give. I have searched tirelessly to find directions or videos on how to disassemble this item, there is none. Please help.