Repair guide about iPhone 7 Wi-Fi cannot be turn on
if your iPhone 7 Wi-Fi cannot be turn on,First, I recommend sent to a repair company that sends a technician to your home or office who will fix your iPhone (and sometimes at a cheaper price than you’d get at the Apple Store!).
Second, for those of you who are feeling especially brave, I’d like to recommend an excellent repair website called vipprogrammer.com. vipprog has repair guides for just about everything Apple, and while researching this issue I found an article written by a user that recommends some very non-traditional fixes for a grayed-out Wi-Fi on iPhone.
Finally, vip pro shop team has repair guides if you’d like to try to replace the Wi-Fi antenna on your iPhone yourself, but it’s a difficult repair. I wouldn’t recommend doing a Wi-Fi antenna repair to anyone who hasn’t done iPhone repairs in the past, because small mistakes can render your iPhone useless for good.as follow,how to fix iPhone 7 Wi-Fi cannot be turn on?
Customers to repair an iPhone 7.the fault is that the iPhone has been dropped, the Bluetooth can be turned on, but the WIFI icon is gray and cannot be opened. When we got the iPhone, we press the iPhone power button, and test the other functions first, all is fine, and the only problem is WIFI cannot be turn on. As shown in picture 9-5-1
After we enter the IOS system, we still cannot see the MAC address of WIFI, as shown in picture 9-5-2
Not even Wi-Fi addresses like this are basically caused by the iPhone CPU does not recognize the Wi-Fi chip , the customer said the iPhone has been dropped, we suspect that the chip was damaged or empty solder. Test the Wi-Fi working conditions before removing the chip. As shown in picture 9-5-3.
Use multimeter to measure the diode data, no problem found, is it really the Wi-Fi chip that's broken? Now we only can remove it and replace the new one. To replace the iPhone 7 Wi-Fi chip, you need to remove iPhone NAND flash and unlock. Now, we remove the Wi-Fi chip, and then we found that the solder pad of Wi-Fi chip dropped four points, the position of circuit diagram as follows 9-5-4
These pins are on the PCIE bus, and it passes through coupling capacitor to the CPU. Ready to replace the chip, but replacing the chip requires removing the NAND flash, so we’re trying to make up the pins on the chip. Scrape out solder joints, weld the jump wire , and paint the green UV oil , and then plant Tin, welding it with rework station. Well-welded chip as shown in the picture 9-5-5.
The small pins on the edge of the chip can be used to test whether it is properly welded. After welding, measure the diode data with multimeter, it is normal. Boot it and test it, the failure has been repaired, as shown in picture 9-5-6.
Finally, we can see the WIFI address on the phone, which shows the CPU has already identified the chip. The WIFI can be turn on now, as shown in the picture 9-5-7. Test it for a period of time, all is fine, send the iPhone 7 back to the customer.
Second, for those of you who are feeling especially brave, I’d like to recommend an excellent repair website called vipprogrammer.com. vipprog has repair guides for just about everything Apple, and while researching this issue I found an article written by a user that recommends some very non-traditional fixes for a grayed-out Wi-Fi on iPhone.
Finally, vip pro shop team has repair guides if you’d like to try to replace the Wi-Fi antenna on your iPhone yourself, but it’s a difficult repair. I wouldn’t recommend doing a Wi-Fi antenna repair to anyone who hasn’t done iPhone repairs in the past, because small mistakes can render your iPhone useless for good.as follow,how to fix iPhone 7 Wi-Fi cannot be turn on?
Customers to repair an iPhone 7.the fault is that the iPhone has been dropped, the Bluetooth can be turned on, but the WIFI icon is gray and cannot be opened. When we got the iPhone, we press the iPhone power button, and test the other functions first, all is fine, and the only problem is WIFI cannot be turn on. As shown in picture 9-5-1
After we enter the IOS system, we still cannot see the MAC address of WIFI, as shown in picture 9-5-2
Not even Wi-Fi addresses like this are basically caused by the iPhone CPU does not recognize the Wi-Fi chip , the customer said the iPhone has been dropped, we suspect that the chip was damaged or empty solder. Test the Wi-Fi working conditions before removing the chip. As shown in picture 9-5-3.
Use multimeter to measure the diode data, no problem found, is it really the Wi-Fi chip that's broken? Now we only can remove it and replace the new one. To replace the iPhone 7 Wi-Fi chip, you need to remove iPhone NAND flash and unlock. Now, we remove the Wi-Fi chip, and then we found that the solder pad of Wi-Fi chip dropped four points, the position of circuit diagram as follows 9-5-4
These pins are on the PCIE bus, and it passes through coupling capacitor to the CPU. Ready to replace the chip, but replacing the chip requires removing the NAND flash, so we’re trying to make up the pins on the chip. Scrape out solder joints, weld the jump wire , and paint the green UV oil , and then plant Tin, welding it with rework station. Well-welded chip as shown in the picture 9-5-5.
The small pins on the edge of the chip can be used to test whether it is properly welded. After welding, measure the diode data with multimeter, it is normal. Boot it and test it, the failure has been repaired, as shown in picture 9-5-6.
Finally, we can see the WIFI address on the phone, which shows the CPU has already identified the chip. The WIFI can be turn on now, as shown in the picture 9-5-7. Test it for a period of time, all is fine, send the iPhone 7 back to the customer.
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