Effective repair iPhone 6S 4013 failed
We received an iPhone 6S that showed 4013 failure. By observing the appearance of the iPhone 6S, we found that it had water marks and there was corrosion near the iPhone baseband power supply.Connect iPhone motherboard to the DPS DC power supply and then test it, the current stuck on about 80mA, judged as a data-cable mode. Install the iPhone 6S and use iTunes to flash it, the failure still there, the iTunes still reports error 4013.At this tim, how can we repair it? The following is the repair steps.
We need to check the iPhone carefully to find out the fault part. First we check iPhone baseband circuit, if the iPhone baseband power is short circuit, if the resistance is normal and whether the 19.2 clock is normal. Replace the better iPhone baseband CPU, if the iTunes process bar can be moved, then iPhone baseband CPU may be damaged. As shown in picture.
After disassemble it, we found the corrosion phenomenon around the iPhone baseband power is very serious, first suspected baseband power supply. Use QUICK 861DW hot air rework station to remove the iPhone baseband power supply, and then install the new one, but the problem still there after replacement. Next step, we need to open the iPhone baseband protective cover to check whether the iPhone baseband is damaged.
Open the baseband protective cover, and check iPhone logic board under the Stereo Zoom Microscope, there were no traces of water near the baseband, and the preservation was intact. Does it mean the iPhone baseband CPU is damaged internally? As shown in picture.
After observe it carefully, we found that the screw hole BS0502 has been penetrated, and several circuits on the bottom of the layer board are disconnected. As shown in picture.
Reconnect them，install the iPhone 6S and flash it again, it worked. Get into IOS and test all functions on iPhone, all works properly, the failure has been solved.
Summary:
This 4013 failure is not caused by iPhone baseband problem, it is caused by the breakdown of the main CPU due to the screw hole being penetrated，it is very important to observe and judge the actual repairing.
If you need help, please contact us at www.vipfixphone.com.
We need to check the iPhone carefully to find out the fault part. First we check iPhone baseband circuit, if the iPhone baseband power is short circuit, if the resistance is normal and whether the 19.2 clock is normal. Replace the better iPhone baseband CPU, if the iTunes process bar can be moved, then iPhone baseband CPU may be damaged. As shown in picture.
After disassemble it, we found the corrosion phenomenon around the iPhone baseband power is very serious, first suspected baseband power supply. Use QUICK 861DW hot air rework station to remove the iPhone baseband power supply, and then install the new one, but the problem still there after replacement. Next step, we need to open the iPhone baseband protective cover to check whether the iPhone baseband is damaged.
Open the baseband protective cover, and check iPhone logic board under the Stereo Zoom Microscope, there were no traces of water near the baseband, and the preservation was intact. Does it mean the iPhone baseband CPU is damaged internally? As shown in picture.
After observe it carefully, we found that the screw hole BS0502 has been penetrated, and several circuits on the bottom of the layer board are disconnected. As shown in picture.
Reconnect them，install the iPhone 6S and flash it again, it worked. Get into IOS and test all functions on iPhone, all works properly, the failure has been solved.
Summary:
This 4013 failure is not caused by iPhone baseband problem, it is caused by the breakdown of the main CPU due to the screw hole being penetrated，it is very important to observe and judge the actual repairing.
If you need help, please contact us at www.vipfixphone.com.
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