I just purchased a 2008 210 Fission and have a problem with my tower speakers. The tower speakers come on and then immediately go off. All other speakers are working fine. Sometimes when I turn the engine off and back on then they will stay on. The hand held microphone only works when the tower speakers are working. Fuses are good and there is power to both amps and to the ignition switch. Has anyone experienced this problem? Could it possibly be a short or bad ground in the ignition switch???