Members bmast160 Posted February 23, 2021 Members Share Posted February 23, 2021 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? Link to comment Share on other sites More sharing options...
Moderators daddymack Posted March 2, 2021 Moderators Share Posted March 2, 2021 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. Link to comment Share on other sites More sharing options...
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