iPhone/iPod/iPad is not installed properly.
- Remove your iPhone/iPod/iPad from the dock and check for obstruction on the connectors in the dock and on your iPhone/iPod. Then reseat it in the dock.
iPhone/iPod/iPad is locked up/ frozen or battery has a problem.
- Please make sure your iPhone/iPod/iPad is working properly before docking into the unit. Please refer to your iPhone/iPod/iPad manual for details.