1. Press the power button and HOME button together for about 10 seconds to see if the phone has a reaction or the data cable is connected to the computer to see;
2, the mobile phone is wrapped in cotton cloth for about a minute to see if there is a reaction in charging, because the weather is cold and the battery temperature is low.
3, if you have strong manual ability, unscrew the tail screw, open the phone (note that 5 is the first to remove the screen, there are tutorials on the Internet), remove the battery with universal charging. The reason is that the battery has a charging voltage, because you play the phone to play the automatic shutdown, the battery voltage is too low, so direct charging can not be charged, and universal charging can be.
4, finally, if the above is not successful and you can not do it, then only to repair.