The amp turns on, and the tubes warm up. But no sound comes out. Replaced two of the tubes. We know the others work but what else could be the problem?
In amps with a effects loop or with power amp in, always check the IN socket. Squirt in some switch cleaner and put a jack in and out a few times (can do with power off. I Have a had a few amps over the years where the signal from the pre to power amp is broken by a dodgy connection. I have had a few amps over the years with this problem
I'm assuming that no sound applies to both the clean and ultra modes. You didn't say which tubes you replaced but I'm guessing the input tube was not replaced. Did you keep the old tubes? When "no sound comes out", do you hear any kind of a low level hum on the speaker output? I think the front end tube is open or the switch logic switch is defective. Hope this helps.
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