Members bmast160 0 Posted February 23 Members Share Posted February 23 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? Quote Link to post Share on other sites
Moderators daddymack 3,550 Posted Tuesday at 03:04 PM Moderators Share Posted Tuesday at 03:04 PM 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. Quote Link to post Share on other sites
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