Your charger is bad. Usually the transformer end that plugs into the wall is the culprit. This is an on going problem with the MH-51 charger that is supplied with the Coolpix 775, 885, 995, and Coolpix 5000's, that Nikon will not admit to. Many customers have had their chargers either repaired or replaced by Nikon more than once. The new charger that is currently supplied with Coolpix cameras that use the EN-EL1 Lithium Ion battery is the MH-53. It is a small charger base with the outlet prongs built-in to it, no more two piece set-up consisting of the charger base and the transformer. So if Nikon doesn't recognize a problem with the MH-51, then why did they replace it the MH-53? By the way all newly shipped Coolpix 5000's now have the new firmware upgrade version 1.7 and the new MH-53 charger as well as opposed to the MH-51 that came with the earlier versions and can be recognized by a blue dot and green dot on the box by the UPC code/serial number sticker.