Platine/Motherboard Amplifier out of order

Hey folks,

the mainboard / amplifier of my Charge 2+ is out of order. It is selecting only one of the 2 speakers. A capacitor has broken. Soldering is not so easy, so i am searching for an alternative amplifier/mainboard.

Anybody an idea, where i can get one, original or alternative? And which alternative one can be used?

Thanks a lot, best wishes

Stephan