How to quickly fix iPhone 6 Plus not display after boot? - VIP Pro Shop Team

As a matter of fact, a number of iPhone 6 Plus owners have been raising complaints online regarding their iPhones that won’t boot up for some reason, even after just a few days or weeks of use. Generally, the best way to fix iPhone 6 Plus that won’t turn on is to connect your iPhone to iTunes via desktop USB or reboot into recovery mode. VIP Pro Shop Team will explain the solution in the following article.

Trouble Phenomenon: 

The iPhone occasionally appear touch failure or jump randomly before dropping, it can return to normal after press switch. When repair touch IC, the iPhone 6 Plus fell to the ground, the bottom right corner of the touch screen glass is broken, and the front camera turned black, but the iPhone still can be used. A few days ago, when turn it on; the screen is blurry when the white Apple LOGO appears and it can't enter the IOS.  Now, it can't boot, and the current is 150mA. GPS antenna was broken and now it shows GPS signal is weak when moving.

Repair Process: 

Remove the motherboard (picture 7-3-1), it is shocking to us. The touch IC and WiFi chip have been repaired, it doesn't matter, and we can fix it by replace the new chip. The most important problem is the capacitance resistor and inductor of back socket was empty solder. As shown in picture 7-3-2.

7-3-1

7-3-2

A row of resistors and capacitance, also have bad chips, it's really a headache. Connect motherboard to DC power supply, the current jumps between 70mA and 120mA. 

The failure is as follows: 

1. The CPU was missing solder

2. Touch jump wire

3. Camera

4. Other problems caused by CP

First repair CPU, omit the process, the result is shown in the picture 7-3-3.

7-3-3

After repair CPU, power on iPhone and test it, there still have many diode data of socket are abnormal, put it under the microscope, and we directly remove it and re-fill it, as shown in picture 7-3-4. When we remove it, we can find that the glue is gone, but the glue on normal motherboard small components won't drop.

7-3-4

After dealing with these, test it again, still no display. Now, we can only do it step by step. Measuring display power supply, all is normal. Measure the resistance of the display socket, we found there is no 5.7V power supply, but when measuring the voltage behind it, it is present, so we suspect that it is disconnect. After measurement, it's really disconnected. Solder jump wire as show in picture 7-3-5 and 7-3-6.

7-3-5 

7-3-6

After jump wire, test it, the display back to normal, but the touch function doesn't work. Solder jump wire with soldering station to fix touch MI pin, as show in picture 7-3-7.

7-3-7

After soldering the jump wire and chip, enter the IOS and test it, there still have a problem with the front camera, and there is a vertical bar where the rear camera takes pictures. The problem of rear camera is caused by camera 2.5V power supply direct connect and PVCCMAN short connect. As shown in picture 7-3-8.

7-3-8

The problem with the front camera is that the inductor is connected directly to the lead, as shown in picture 7-3-9.

7-3-9

Fill the missing components and measure the resistance data, we found that the value of the front complement element has 10 Ohms difference. Power on and test it, both of the rear and front camera are normal. But the deviation of the front camera resistance may cause by CPU, now is good, maybe it will be damaged after a period of use. Picture 7-3-10.

7-3-10

Finally, the problem of the iPhone 6 Plus has been solved, as shown in picture 7-3-11.

7-3-11

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