sounds like it might need a motor... you CAN do it yourself, BUT... be prepared to skin some knuckles and swear a lot...
worst part will be cutting the sToOPid rivits holding the motor in, and you're going to have to come up with some small bolts to put it back together...
I'd use a test light at the plug of the motor and make sure it's getting power and ground before I did anything else... | 
