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My speaker won’t make any sound. It doesn’t even make the tone sounds that it used to when I turn it on & off & it won’t play music. It’s charged & paired with devices & the lights work but it won’t make no sound at all

I have the same problem. Since it sounds when I connected a pair of headphones to the aux out, we can narrow it down past the preamp. Possible problem power amp section (most likely) or speakers. Poblem I can’t find a way to open up the set. Any body with a service manual?