Table 1: iPhone does not charge (quickly discharges), cannot be detected by computer.
|Problem||Reasons||What to do|
|Wire (charger cable)||Replace wire|
|Charging connector||Clean it|
|Charging dock port ribbon cable||It is not connected correctly||Reconnect|
|Connector is dirty||Clean the connector with a toothbrush|
|The soldering of the connector is broken||Solder it|
|Defective connector||Replace the connector|
|Defective charging dock port ribbon cable||Replace it. Check the presence of 5V voltage with a multimeter.|
|Battery||The battery is not connected correctly||Reconnect it|
|Defective battery||Replace it|
|Faulty display module||Replace display module|
|Faulty tristar chip||There is no consumption on the diagnostic unit. The phone is not detected by the computer. When you install a serviceable battery the phone is quickly discharged.||Replace phone charge control chip (U2)|
|NAND Flash||Error “4013” and the apple / reboot||Replace NAND Flash chip (phone hard drive (USB flash drive/memory))|
|Main power controller||The phone takes a long time to charge||Replace the main power controller|
We have considered the main causes of the malfunction – the iPhone will not charge. Detailed diagnostics of the phone charge circuit is studied during the bga soldering training.