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Well, try again for a lower voltage on the smoke motor.  Make SURE you unplug it from the electronics before applying voltage direct to the smoke motor.  The motor could run but draw excessive current, or it might not run on 5 volts.  Of course, you could have a tether issue, and it could also be the board.

My benchmark is the motor runs on 2 volts DC, and on 5 volts DC it doesn't draw more than 50ma.  If it doesn't pass those two tests, it's a bad motor.

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