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How to fix iPhone 7 Plus does not display after boot

"Something wrong with my iPhone 7 Plus!" A customer said that. Last week, Vip Pro Shop Team got a damaged iPhone 7 Plus, its owner said that the LCD screen doesn't display after boot. What's going on? Let's find the truth.

Connect iPhone to DC power supply, it shows big current. Then we disassemble the iPhone 7 by tweezers, we found it has been repaired, the USB control IC has been soldered, now it is directly on it. As shown in picture 7-10-1.



Remove the USB control IC, and then connect the DC power supply, it shows a large current of about 700mA, it has short circuit. We touch the CPU, it's hot, now we are sure the faulty is on the CPU, soldering rosin on it. As shown in picture 7-10-2.



Connect the DC power supply, we found that the CPU upper was short circuit; in this case, we only can remove it.

However, it's difficult to separate the CPU upper, the glue in the middle is hard glue. To do this, just take it slow and need experience and technology. Remove the upper and the CPU, as shown in picture 7-10-3 and 7-10-4.




Remove the upper, and handle the CPU well. As shown in picture 7-10-5.



Power on and test it, short circuit problem has been solved, the current was jump around 60mA.


Finally, replace the new CPU upper, and assemble the iPhone 7 Plus by screwdriver. After booting, the LCD screen can display normally.
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