We had severe storms in the Northeast last week and had several brown outs and power outages. My Extron crosspoint 300 8x4 component switch went down with a fried power supply. I have a replacement but it does not seem to be responding to any serial commands. Is it possible that one port on the MSC got fried? Everything else is working and responding to commands. I have reset the Extron and spoke with them directly and I do not feel it is the replacement unit. Thanks for any ideas.