Fried Lehner 1940? Help!!!

[Serum]

I don't know what went wrong with your 1940, must have been some weird binding in the drivetrain or a manufacturer error. This problem is an isolated issue, this is actually the first 1940 i heard of that fried without an ESC problem.

I would open the can (unscrew the end-bell, not easy, but doable if you make some kind of tool that hooks up to the 8 screws the end-bell has) perhaps the magnet 'exploded' perhaps the copper isolation got swollen by overheating.