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Harmony 8418 Stopped Working

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I’ve had a Harmony 8418 for a little while. It was working fine yesterday but today no sound is coming out.  I haven’t had any issues before.  The fuse looks ok & the speaker wires are connected. The 5y3gt is lighting up and gets warm.  The 6v6 doesnt seem to light up but it gets warm. The 6sj7 is enclosed so I can’t see if it lights up but it did get faintly warm.  Any suggestions?

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do you have extra/replacement tubes? I would start with swapping out the tubes, one at a time.

If that doesn't do it, I suggest you take it to a qualified amp tech, because poking around in those old amps is even more dangerous than poking around in new amps.


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