Can't charge when I plug in charging cable charge light also not shown

I don’t know if it’s short or what but i can’t charge my W-king S20 waterproof speaker. It works for some time while power on but since it does’t have charge so bleeps and notifies low battery but I can’t charge!! Plugging in doesn’t show any charging LED indicators so i tried to disassemble but can’t take apart the speaker. I searched everywhere but can’t take apart the speaker to get it’s circuit to repair. I want tear down repair guide for charging port please help thanks in advance.This is the speaker i am talking about https://www.youtube.com/watch?v=UupSvC86...