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uhh what kinda noise... generally speaking if the motor was bad it would make no noise. its probably the track or the "transmission" is stripped out... bummer.
motor could be bad, goin bad. or the tracks could just be all sticky and nasty. hold the button and push up on it, try and give it a helping hand. if you get it open spray silicone lubricant in the tracks and see if it works out for ya.