Talked to munkeh on the club meet, he said when you switch to fold, as soon as the mirror clicks, quickly flip the switch back to unfold, it will fix the problem.
I tried on mine, the mirror folds, clicked, I flipped the switch, the mirror unfold back only about 0.5cm then halt again. Haven't found the correct "sequence" yet till now... But that confirms that somehow the unfold switch still works. I dunno what else caused the motor to seized....? Anyone tried this?