Good advice from Onemug, if it's the amp your best hope is that there is a fuse in the circuit that protected the amp.
I had an Audio Refinement Complete integrated, the predecessor of the YBA 201, I think, and blew out the right channel when a pair of speakers arrived with an internal short. There was no fuse in the circuit and the cost to replace all the blown resistors was just about exactly the value of the amp, ~$500. I paid it rather than throw the amp away but it wasn't fun.
I had an Audio Refinement Complete integrated, the predecessor of the YBA 201, I think, and blew out the right channel when a pair of speakers arrived with an internal short. There was no fuse in the circuit and the cost to replace all the blown resistors was just about exactly the value of the amp, ~$500. I paid it rather than throw the amp away but it wasn't fun.