How noisy is noisy? Put a screwdriver to the outside case and put your ear to the handle. The type of noise you hear will tell you whether its a serious mechanical fault or just a noisy arm. Back up anyway!
Describe type of noises
soft musical ?
waves on a sea shore ?
gurgling?
Fingergnails on a chalk board?
Ticking of a clock?
all of the above in a cacophony?