ORIGINAL: CGCINC
ORIGINAL: huck1199
Is it a digital servo? They sometimes buzz, but may be OK.
No.. This is no buzz, its a noise basically like when it's moving, but it's not moving. hard to explain but not a digital buzz, I had those on my RC truck.
It is hard to say without hearing it but the noise could be normal and due to the servo just trying to center itself. Does it go away if you wiggle the surface by hand a little? If so, it may be no big deal and will probably stop once in the air. On the other hand, it could be more serious. Definitely have someone at your local club or hobby shop take a look.
If the hobby shop helps you out with something you did not purchase form them, be sure to become their good customer.