I bought a Wahl hair clipper in August in Florida. On my return home in Jamaica, I tried to use the clipper for the first time last week. When I turned it on, there was a loud noise; I turned the power screw clockwise and then counter-clockwise until the noise subsided. However, when the noise is down, the clipper does not work -- regardless of which comb I clip on. What should I do? Thanks. Kwame Boafo (email: boafokwame@gmail.com)