I've been having an issue with my Hartke LH1000 that I'm wondering if someone could shed some light on The amp has two modes – Bridge mode, wherein there is a single Speakon output for the whole 1000 watts, and the normal unbridged mode, wherein there are two seperate speaker channels (A & B) that each have two jacks to connect speakers with. When unbridged, there is a balance control to pan between the two speaker channels The amp used to work fine; recently, however, whatever is plugged into Channel A gets no power at all. This is regardless of whether it is in unbridged mode or bridged mode, and regardless of where the balance pan is set I'm wondering if this seems like something that could be a quick DIY repair. I'm comfortable repairing / installing / customizing electronics in my basses, guitars, cabs, computers, etc. I'm skilled enough with a soldering iron and a multimeter. I'm *not* experienced at making my way around amplifier motherboards, and the internals on this one seem... rather daunting Does anyone have any thoughts?