I was fiddling around with my Keces DA-152 DAC/amp because there was a lot of noise and I was trying to figure out what was causing it. Stupid me wasn't thinking and I switched the input voltage from 230V to 115V. When I turned it on it died in a second. There was no sound or smoke, it just died. Now it won't power on. I'd like some advice on how to repair something like this, whether it's only affected the power supply of the unit or the entire thing, and if there's something I'm overlooking. Thanks in advance.