Syn50 Issue

[Genghis]

I snagged an open box Synergy JMP module from Sweetwater for my Syn50 head and was having a blast trying it out. Just when I got a nice somewhat hi gain lead tone feeding back, the gain started to fade out and before I knew it the amp shut off. I didn’t spend much time doing any troubleshooting yet. I’m assuming at the bare minimum the fuse blew. I’ll pull it out and swap the fuse and get a better look at the tubes tomorrow, but thought I’d see if some of the more technical guys have any tips.

I got the head used, and I’m thinking maybe a power tube is on the way out, but there may be other things I should check. Please let me know if you have any ideas.