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So I have a dead 410S and 411G. I doubt these are even worth trying to repair, but wondering if there are folks out there who do repair old Esc's.

Replacing fets is pretty straightforward. Bec regulators also. Once you get into the control parts it becomes more difficult.

It depends on the symptoms what is probably broken or bad.

Thanks for the reply. I opened them up and the 410S wasn't burnt so I'll check the fets. The 411G board is burnt badly under one of the voltage regulators so it might be done.