Ayre preamp no output

Any answers on why my Ayre preamp quit giving any output signal to my amp after power company switched my meter. This would have turned off and back on my power to house. I can hook my OPPO BDP 105d direct to amp and everything plays fine. When hooking OPPO to preamp and preamp to amp nothing. All the lights and volume goes up and down on the preamp, but zero signal being sent to the amp.