Hello. thanks for your feedback but the problem still on.

I have try to connect the servo on external power supply(battery) and the zzzz sound still come from the servo although the both Arduino
and servo on the common ground.

any other options ??? because I think that the servo need to be change, so I will go tomorrow to the store for change it.     

Hello guys. excuse me for the bad english but I really need your help for my servo

the servo type is SM-S4303R, but when I used the example code and the standerd wiring  connection it doesn't work.

it just make 'zzzzzz' sound so I don't understand what happend

can any one explane why this sound come from the servo ???
is it the power issue or the servo it self was broken from the bingeing???