Had a lightning strike take out a lot of electronics around the house. Yes everything is on surge protectors. Regardless my GFA-7605 is only working intermittently. When it doesn't work the LED on the power button is dim. The 12v power supply output only measures 11.72 volts. Is this the correct output voltage? When I disconnect the 12V side to the amp side and connect the power cord you can hear it surge like normal and power LED is bright. If I connect the 12v to the power supply and then plug in AC power it doesn't sound like there is any load/current and only get a dim power LED. I can get a replacement power supply for $118 but would like confirmation this is the problem. Thanks for your advice.