I'm having a stroke of bad luck, I fear. I turn on my little kr-2300 and nothing but buzzing comes out. It was working fine just yesterday. I've only had this receiver for a couple of days and apart from some cleaning, didn't do anything to it. The sound is great and much more powerfull than 14WPC would suggest. But now, there is no sound coming through the speakers at all, and with my headphones on I can only hear a monotone buzz coming through both channels. The buzzing doesn't change with volume, tone, inputs.. All fuses are intact. So far, I've checked the output transistors and they are fine, as well replaced the 1000µF caps, but no change. Solder joints all look good. Any thoughts on what might be causing this? It's a damn shame because I really like the look of this receiver.