Harman/Kardon Onyx II Bluetooth Speaker

[Quantum IC]

I have this speaker that won't turn on.
The BC57E687C Bluetooth chip gets warm after about 1 minute with the wall charger connected.
I hope you can help me please.

I attached a very similar schematic.

Mi altavoz tiene micrófono incorporado y entrada auxiliar. El diagrama del altavoz en el esquema no.