DIY: How to Fix iPhone WiFi by Reflowing the Logic Board (PCB) using Oven

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Your iPhone’s WiFi is the one of the most important features on your iPhone. Without it, you need to find alternative ways so that you can still browse the internet, download apps, jailbreak or unlock it. The typical symptoms of non-working WiFi on iPhones are:

  • It finds and loses network
  • It doesn’t connect to WiFi
  • WiFi grayed out
  • Your WiFi password is not accepted although you’re sure that it’s correct
  • It connects but connection drops after a short while
  • No WiFi address under Settings > General > About
  • It works when you put it inside the freezer – only for a short moment
  • You’ve tried everything here including reading the Knowledge Base articles and taking it to the Apple Store

Fortunately, there is a possible DIY method you can try at home by reflowing the logic board (a.k.a. motherboard or PCB). Essentially, you are “baking” your iPhone’s logic board to melt the solder connection of the WiFi chip to improve connectivity; thus hopefully resolves your iPhone’s WiFi issues.

Disclaimer: Do not proceed if you are unsure what to do. We will NOT be responsible for any damage caused to your iPhone. Always practice SAFETY FIRST.

What you need

Editor's note: learn more by reading our ebook on starting your own iPhone repair & unlock business
  1. An iPhone with broken WiFi
  2. iPhone opening tools (screwdriver and suction cup)
  3. Oven thermometer
  4. Oven
  5. Patience, lots of it…

Instructions

  1. Disassemble your iPhone (find YouTube video tutorials here). Remember to detach the digital camera CMOS sensor from the logic board.
  2. Turn on the oven and set the temperature to 196 degree Celcius or 385 degree Fahrenheit.
  3. Place the logic board onto a cooking sheet or aluminium foil with EMI shield up.
  4. Once the oven has reached the desired temperature, put it into the oven and bake it for 7 minutes.
  5. When time is up, leave the oven door opened and leave the logic board to cool down for 60 minutes. Do not attempt to touch or move it. Be patient.
  6. Finally, reassemble your iPhone and test the WiFi connection.

If the oven trick above works for you, great, otherwise, there have been cases where some people have been successful after a second/third attempt. If all fails, you can contact us and we will just replace the WiFi chip for you. Good luck and leave your comments below.

DIY: How to Fix iPhone WiFi by Reflowing the Logic Board (PCB) using Oven was last modified: July 2nd, 2018 by Joe Wang

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