How to fix iphone 5s automatically shuts down after charging

iphone 5s with a non-original USB cable to charge, the phone itself off, press the key no response。

Repair Process

Tear down iPhone and remove battery (picture 5–22). Use multimeter to measure the battery voltage, which is 0V.

Picture 5–22

0V voltage suggests that battery has gotten into the protection mode. So we use a battery actuator (picture 5–23) to actuate battery.

Picture 5–23

Then assemble battery on iPhone and turn it on. The battery icon in it to indicate it is workable but the power is low (picture 5–24) and it needs to be charged.

Picture 5–24

Plug the original charger but the iPhone is unresponsive. Remove battery and supply motherboard power through an adjustable 3.8V power to trigger it on. We notice that the current is at the high end during and after the turn on process and USB Control chip is hot. The material object of the USB management chip U2 is shown in picture 5–25.

Picture 5–25

The location of USB management chip U2 in bitmap is shown in picture 5–26.

Picture 5–26

Replace a new USB management chip and turn iPhone on. Plug a charger and the charging process is normal. Trouble is removed. The main solder pad after the USB management chip is removed is shown in picture 5–27.

Picture 5–27

Welcome to a place where words matter. On Medium, smart voices and original ideas take center stage - with no ads in sight. Watch
Follow all the topics you care about, and we’ll deliver the best stories for you to your homepage and inbox. Explore
Get unlimited access to the best stories on Medium — and support writers while you’re at it. Just $5/month. Upgrade