Well, not completely dead, it powers up and has had very little play time. We're talking single digit hours in total, but it hasn't been played for possibly two years. I broke it out today to A/B with my other amps to see if what I like is really still what I like. The bass and cab line up has changed. I plugged it in and powered up, had a very brief decaying note at low volume. Now everything is powered up, light are on, but I'm not getting any sound on either channel A or B. If I engage the mute switch there is a small click through the speaker, so I think the power amp is working. made sure all the ribbon connectors were connected and those look ok. I'm thinking the preamp tubes at this point. Maybe swap them out one by one? I think I have a 12AX7 somewhere. These were brand new quality tubes, but tubes do go bad.