This is a problem with the battery and the charger. In this model, as a factory problem, sometimes the battery can not be started. So it needs a kind of shock to take over the battery protection. Most chargers are 750 mA. So you should take a strong charger like 1.4, 1.5 A or 2.0 A to start the phone and keep it to the end. It is not difficult to find this charger but they will be generic. Sometimes you will have to keep this charger eternally. Do not worry, it will not burn your phone. Keep some minutes and wait to try to start.