To check for current
If your iPhone refuses to charge, check first of all whether to give him an electric current. This advice may seem silly, but the situation with turning out the lights or taking off at the fuse-box fuses are not uncommon. Besides charging cable - not the most reliable device in the world and can easily fail. The easiest way to try to charge the iPhone cable, it is possible that such an insignificant cost replacement can correct the situation.
You should be clear that all subsequent actions will you carry out at your own risk, so resort to it only if the requesting service is not possible.
Cleaning the contacts
If changing the cable doesn't help, then perhaps the problem lies in the iphone and it should be handed over to the service center for repair. This step is suitable for those who have the device is still under warranty, but what to do if it is already there, as well as funds to pay for expensive repairs? First inspect the connection of the cable, maybe it was just clogged with compacted dust. To remove it you will need a needle to eject a SIM card coming in the package of the iPhone. Insert it into the charging socket and move from side to side, not forgetting the hidden corners of dirt.
The described method can help to revive the drowned iPhone, only instead of dust to be removed will be the particles deposited on the contacts of corrosion.
If cleaning did not help
If the procedure failed, do nothing, have to see a specialist. Any other actions to revitalize refused to charge the iPhone require special knowledge and skills, as well as specific tools for disassembly. If you do not have, take the device to the service, they will help him.