Today we've tackled an issue many iPhone XS users may face - a device that won't charge or turn on. Initially, the phone was barely drawing any power, as indicated by the readings on our lab power supply.

To diagnose the problem, we disassembled the device by removing the torx screws at the bottom of the chassis and carefully prying the screen open. On gaining access to the internals, we carefully removed the screws and the protective plate to reach the motherboard. What we sought was not just a surface-level look, but an in-depth exploration of what might be causing the issue.

Our first step in the diagnosis was a visual inspection of the motherboard, a process that always holds significant importance in our approach. Careful observation was particularly required around the board's junctions, as these often prove to be the key to identifying any issues.

To facilitate a more detailed inspection, we utilized a 90x Amscope microscope. This allowed us to identify that the protective foam on the motherboard had been subjected to some heat. We also noted signs of previous tampering - flux on the FPC connector and a damaged plastic connector. The junction of the boards also showed signs of previous meddling.

Next, we removed the foam protection from the connectors and proceeded to separate the boards. For this delicate process, we employed a machine that works at 220ºC, ensuring we avoided excessive force that could damage the components.

After cooling down the separated boards, we took a closer look under the microscope, taking note of the state of the solder balls and identifying any potential faults. Here, we observed improperly applied thermal paste and signs of overheating damage. We used a thermal camera to further analyze the board and detect any area of intermittent consumption.

The next steps included a thorough cleaning with isopropyl alcohol and testing side A with a lab power source. In this stage, we got an image on the screen, which was a good sign. To join the two boards without soldering them, we used the iSocket tool. It's an incredibly helpful tool for diagnosing issues like this one.

After diagnosing the problems and taking necessary measures, we restored the device's functionality. Even though device repair can seem complex, it's certainly manageable with the right tools and understanding. Each step and tool used in the process is essential and requires careful handling. The key to successful repair, as always, is patience, precision, and attention to detail.

Finally, after re-ball the integrated circuit, joining the two boards, and assembling the device, we conducted further checks to ensure network, wifi, and bluetooth were working correctly. It was rewarding to see the iPhone XS functioning again, and I hope this video tutorial was both helpful and enlightening for you.

Thank you for joining me on this repair journey. My aim is always to help you understand the process and provide solutions for issues you might encounter with your device. I look forward to our next repair adventure. Until then, take care and goodbye!

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