FGXR8UTE

Hi All, is making a ticking noise consistently approx every second. When you move the volume knob it ticks the same speed as you turn the dial. If the volume is turned down to zero it stops. The volume of the noise seems to be the same no matter how loud you turn it up. It does it on all inputs (iPod,radio,cd etc). Anyone have any ideas or had the same problem? Thanks