If you can't hear any sound from your S400i clock radio dock, try these suggestions:

• Confirm that you've selected the correct audio source by pressing the source buttons on the top of your dock.

• The clock will display even if you've turned the dock off by using the power button or by unplugging it (the clock has a battery backup). Make sure that the dock is connected to power and is turned on. The selected source should display on the LCD if the unit is turned on.

• Make sure that the volume is at an audible level.

• Try disconnecting and then reconnecting your source device, and then restart the audio content.