plugging in a servo motor bus BEAGLEBONE Black.

coloquei um servo motor invertido no beaglebone black. Eu queimei a saida PWM? Se não como eu recupero o funcionamento?
put a servo motor in reverse BEAGLEBONE black. I burned the output PWM? If not how do I recover the operation?

Well, you just blew up the processor. So, the processor has to be replaced. You can file an RMA request.

beagleboard.org/support/rma

Gerald