This time around, I was faced with a particular challenge: an iPhone XS that wouldn't charge or turn on. When connected to my lab source, the power displayed was exceptionally low, clearly indicating a problem.
My first step was to disassemble the device. This involved removing the torx screws at the bottom of the chassis and using a suction cup to create an opening. With the help of a plastic pick, I cut through the adhesive and was able to access the inside of the iPhone.
🟨 iHeater
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Once inside, I removed the screws and the protection plate, managing to remove the motherboard. This is where visual inspection becomes essential. I watched the junction of the plates closely and used a 90x Amscope microscope to examine more closely. I noticed that the foam protection had been exposed to high temperatures, and there was flux on the FPC connector, indicating that the device had been tampered with previously.
🟥 Mijing CH5 Join iPhone plates
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I continued my inspection and found a damaged plastic connector, and signs of tampering at the junction of the boards. I wrote down each anomaly as I proceeded to remove the foam protection from the connectors. To separate the plates, I used a machine that works at 220ºC and was careful to avoid excessive force during the process.
After removing the top layer, I cooled the plates with a computer fan. With the help of the microscope, I looked for possible failures in the motherboard and observed that the thermal paste was not applied correctly. In view of overheating damage, I used a thermal camera to analyze the board and detected intermittent consumption in a specific area.
I then applied some flux and warmed the area, followed by a thorough cleaning with rubbing alcohol. I connected side A to a lab source to see what happened, and luckily, I was able to get an image on the screen. I used the iSocket tool to join the two boards without soldering them together to make it easier to connect the display to the motherboard.
I had identified and solved the problems, and after connecting all the flexes, I was able to turn on the device. I did some additional checking, scrambling the IC, joining two boards together, and assembling the device. To finish, I checked if I had network, wifi and bluetooth working correctly.
This repair process may seem complex, but with the right tools and a good understanding of each step, it can be done effectively. Patience, precision and attention to detail are essential in this job. I am proud to be able to share this tutorial with all of you, and I hope you find it useful and educational. Until the next video. See you later!
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