Repair Creative Inspire 6700 6.1

Good evening, everyone.

I have a set of Creative Inspire 6700 6.1 speakers from 2003, and they lasted until recently. :(

Every time I turn on the speakers (using the controller), they produce a very loud buzzing noise and don’t output any other sound.

I’ve opened the control unit and the subwoofer to check the circuit board, but I don’t see anything unusual.

Since I don’t really know how to measure all the components to check if they’re working correctly, I came here to ask for some help.