Do you suspect it was sever over voltage from the power to the power conditioner? Or something to do with the power conditioner itself? How would you go about checking if my speakers are okay?
Thanks!
There is no way I can answer that question. As nothing else in the house has been hit, and you noticed nothing unusual, I suspect the Belkin unit as the most likely culprit, but I can be far from certain of that. I have a high degree of certainty that both receiver and power amp were taken out by over voltage. I would get rid of the Belkin as either it was the cause, or was subjected to over voltage and now suspect on that account alone.
You can test the speakers by checking the DC resistance of each against spec for a start. The make sure all drivers are working by testing them under low power and gradually advancing the power.
Unfortunately this has been a costly catastrophe for you.
By the way, I did do a search to see if the Anthem MC 50 is prone to power cap failure, and I can find no evidence that they are.
If just the MC 50 had failed, I would put it down to a one off defective cap. But with the Yamaha taken out, I would be pretty certain of an external cause, especially as your blinking light on light on the Yamaha suggests power supply failure. That all adds up to an over voltage hit to me.