I just purchased a TomTom GO 730 today and I'm having a bit of trouble. Everything seems to work fine except one small thing. The speaker gives off a static noise. The voices are fine and are not distorted, but from the moment it's turned on until it is turned off there is a slight but audible static noise coming from the TomTom speaker. I've tried turning off the audio but it is still there. Does anyone know what's wrong?