Well, it could be the charger and the battery, or it could be a device that won't work without the battery in (and if dead). It could be the device is not getting the power (even if charger is working) or it could be a host of other issues. Without going through them one at a time there would be no sure way to tell. You could, however, take it to a local tech and have them look at it. Or, if under warranty, contact the manufacturer.