Mod Source not responding. Is my Sub Phatty broken?

[Pulse One]

I just bought a used Moog Sub Phatty. Unortunately, the modulation source (LFO waveform) knob is not responding. I have no experience with this thing, so I'm hoping for your slutty expertise before I pass it off as broken and return it.

The sound gets modulated, and I can modify its depth and rate. The only problem is that the 'source' knob won't change LFO shapes. Changing presets change the mod source accordingly though, and I can change the mod source in the editor via USB. But the physical knob doesn't do anything as far as I can tell.

Is there some hidden feature that may have changed the function of this knob? Is it probable that there is just a connector that came loose during shipping? Any other ideas? It would be a shame to return it just because I missed something.

[stewdio]

I had the exact same issue with my SubPhatty and the LFO switch itself needed replacing.
The repair was $167 from the local authorized service centre in Toronto which in my experience is pretty steep for a single switch replacement so I'm assuming it requires fairly extensive disassembly / reassembly to access it

I would contact Moog support anyways - they might be able to help you out somehow...

[Pulse One]

Doesn't sound too promising. Oh well. Thanks for answering!

[furiousgreencloud]

Mine (SubPhatty) just started doing that too. The resonance knob is on the fritz too.

I'm suspecting cheap surface mount component vs through hole. Grr.

See https://www.youtube.com/watch?v=U0-OVKglSU0 for Sub37 Tear Down.