Everything lights up and is working,but i have no sound

Do you accidentally have it muted? The Mute button, located on PASSPORT's top panel and SmartCord. Have you turned up the volume on it? Volume Control (VOL) To increase or decrease the audio volume, press and hold the (+) or (-) volume control buttons located on the top case. A sample alert tone will be generated, along with a corresponding bar-graph on the display. Once you have reached your desired volume level, simply release the button. This level will be stored in memory. In Preferences Auto Volume is the default. This feature will increase the audio alert level automatically when the ambient noise in the vehicle is high. Good luck.