Please note: you must use the black cable to charge your nabi...the white cable will NOT work as it is for data transfer ONLY.
To test your nabi power cable: remove the cable from the power adapter, plug it into the USB port of your computer, then plug the charging tip into the nabi tablet.
Please note this method will take longer to charge the nabi. Please allow your nabi to charge for several hours. If this still is not working, it could be either the power adapter or the charging port. Confirm your charging port is not damaged before requesting a new charger.