I have a Denon POA 2400 amp that has been loyal to me through thick and thin, even when I tried to trade her in and she sat in a shop for 6 months. Lately I have notice the output will occasionally drop and the amp sounds a bit anemic, if that makes sense. Now since it happens in what sounds to be both channels, is it safe to assume its a power supply issue? I am limited in my tools, and could only take a gander inside... is there a place go start?