2600 Oscillator 1 does not respond to midi in pitch.

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Oscillator 1 just drones. Osc 2 and 3 are fine.

It worked ok with cv but i only just started using it with midi. Can you think of anything i should check? It's not in LFO mode. I tuned all 3 osc to same pitch but osc 1 is unresponsive.

I bought it in june in montreal canada. I am moving back to the uk at start of october so i need to know my best course of action. im hoping i can just return it to the store for a refund at the moment but they were a bit useless with comms when i ordered it so im a bit worried.

can i get this serviced in the uk if i get messed about?