Troubleshoot: No WIFI and Rear Camera unavailable on iPhone 6S Plus

Please protect your iPhone, don't let it drop. Why would i say that? Last week, we received an iPhone 6S Plus, which went through a heavy drop, and then the iPhoen wifi, audio, rear camera, volum, light sensor and card settings all has problems. It took a lot of effort to fix it, the repair process as follows.

 

First, use DC power supply to test iPhone, the iPhone can be turned on smoothly, but the large is abnormal. Get into IOS to test all iPhone functions.   

Card setting. Continue to test other functions, it is true that the front flex cable, audio key flex cable, and rear camera are all broken, so we have to replace all of the spare parts. (Tips: It will get card setting if iPhone CPU can't read WiFi address, even if the WIFI is removed, the result is the same, so it's very important to firstly fix the WIFI if you meet card setting fault in the future. )

The last fault we need to confirm is motherboard: card setting, bad WiFi, audio recording is not available, bad audio and leakage. Triggered with more than 300 mA current, which means it has problem. Now we should solve the fault one by one.

Since we can't get into the setup, so we take off the iPhone 6s Plus WiFi audio first. The result is the same. There are much solder points are dropped at the bottom of WiFi, it damaged very serious. 30 pin is still on the iPhone 6sp motherboard, but the value is measured with 0L (infinity), certainly it's not normal, so we are going to use QUICK 861DW to solder the jumper wire, and also do jumpers on the other disconnected parts.

The jumpers in this repair are easy to do. A tip for new repairman: It's better to leave more jumper outside if there is enough space, so you can extend wire even there are other issues existing.

After soldering jumpers, install the motherboard to test, there is no card setting. We had always thought that only WIFI was not good and that the card was set on the board, and the WIFI would not be stuck. Today, we can see it's same if iPhone WiFi IC is removed off, after intall WiFi, the signal is very weak, it seems that the board layer is broken again, direct solder  jumper wire to the opposite track. As shown in picture 1-1-4.

Now the signal is normal, and then another iPhone 6 plusaudio IC  can be replaced, the whole repair process is finish here!

At last, asssemble the iPhone, turn it on again, enter IOS, test all iPhone functions, all works well!