iPhone 7 WIFI icon won't turn on- Solution

Here is an iPhone 7 need to be repaired, because the iPhone 7 WIFI icon won't turn on, here is the solution.

Test the iPhone 7, all functions are normal except the iPhone WIFI function, the iPhone WIFI icon won't turn on, so the iPhone WIFI can't be used.

First we tried to fix it by some simple software solutions, but failed.

So we are need to disassemble the iPhone 7 to check hardware aspect.

Put iPhone 7 on the WL Aluminum Alloy pad, and then use phone opening tools to disassemble the iPhone, remove the iPhone display assembly, and then take out the iPhone motherboard.

Observe the iPhone motherboard, it looks good, no obvious signs of damage.

Because other functions works properly, but WIFI function not, so we suspect the iPhone WIFI module IC is damaged or virtual welding.

Use digital multimeter to measure the working condition of iPhone WIFI IC, the grounding resistance measured is normal, so we suspect the iPhone WIFI IC is damaged.

Use Phonefix 861DW hot air rework station to heat the iPhone WIFI IC, and then use tweezers to remove it, we found the WIFI IC solder pad is missing 4 pins.

Log into the ZXW online account to check iPhone 7 schematic diagram, we know that these 4 pins are on the PCIE bus, and they pass through coupling capacitance to CPU.

Scrape the solder pad, soldering the jumper wire, and then apply the green UV oil, paint tin and weld it.

Now use digital multimeter to measure the grounding resistance again, the data is back to normal.

Assemble the iPhone 7, and turn it on to test the WIFI function, the iPhone WIFI function works perfectly. The repairs ended!