Frigidaire dryer won't start

[tfenton]

When I first push the Start button everything lights up, but when I push it a second time I get only a buzzing sound. The drum does not begin to spin. I pushed in the door light button and manually started the drum to spin while someone else pushed the Start button. The drum then began to spin on its own. I was told that this indicates that the motor needs to be replaced. Does this sound right? If so, can someone direct me to the part I need to replace? Thanks.