What's the course of a ue boom when turning it on and goes off again the sound comes on just half sound not really the complete sound

What's the course of a ue boom when turning it on, sound comes on and goes off again the sound don't finish but cut off not complete sound comes on just half sound only,but it's fully charged

What have my ue boom ,sound comes on and goes off when is’s fully charged

I tried all the ideas to my ue boom but it couldn't give any sound at all, even when turning it on,but it comes on with out sound and can connect but no sound at all