Well I haven't used my mixer for about a month, and I was just setting everything up at home to record my band's jam sessions. So I've set everything up, and I decide to do some sound checks to get the levels right... but when I line in to my comp, I notice the elvels aren't appearing to be very loud OR clear. Also, when I pick some notes to check the levels, my monitor on the mixer (the series of lights that light up based on volume input) don't light up at all. I tried different mics, leads and channels and they're all the same. So I'm guessing my mic pre-amps are the problem? The lights do light up when u remove a mic or something from the channel, which is odd. Can anyone give me some dieas on what's causing this and how I can go about getting it fixed? Thanks