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.
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