My Acoustic 470 died last night!! Or so I thought, anyway. I was playing fine when all of the sudden the sound just stopped dead. Bummer. I went through all of the simple diagnostics and have nailed it down to the A channel. The A channel no longer responds to input noise (i.e. plugging/unplugging cables) and there is no increase in speaker noise regardless of volume level. There is a very light yet steady sound produced from my bass which is similar in every way to when I have the bass's volume turned all the way down. I did notice that there would be an intermittent boost in volume which basically told me that something in there was shorting out. It seems impossible that I could've pushed anything too hard. We haven't been gigging, so volume levels stay within 1-3 for private and band practices. The only pedal I use is a Russian Muff and the volume on that is only set at around 2 o'clock. B channel works perfectly, so it certainly isn't the input jack. Switching channels was of course the last thing I even checked and, upon the discovery, I went ahead and banged around for about an hour. No issues whatsoever. There aren't really any techs in my area, but I do have a brother-in-law that's handy with a voltmeter and soldering gun. Anyone have any clues on what I should check first? EDIT: This should probably be in the Electronics sections --- ooops!