i have the XO Vision XOD1750, and it's almost like it's going into safety mode as soon as the volume is turned up to about 25 when the car is not running, and about 15 when the car is running. The sound from the stereo or CD or AUX plays until it cuts off, then the only way to get it working again is to turn the key off for about 10 seconds, then turn it back on. What could be wrong? Dave