In today's video, we address a rare issue with the Huawei P30 Pro, where the device fails to read the primary SIM card (SIM 1).
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Hello everyone, I'm Leonardo, and this afternoon we will attempt to resolve this SIM card issue on the Huawei P30 Pro. At 1:05, we discover that the SIM card works perfectly when inserted into the other slot. To inspect the device, we first need to disassemble it. We apply 90°C heat for 3-4 minutes to soften the adhesive on the back cover. Next, we use a plastic card to cut through the glue. Stick around until the end of the video for the cost of this repair.
At 1:44, we proceed to remove all screws to access the motherboard and sub-motherboard. We disconnect the battery connector at 1:53 and then loosen the flex bridge. For such malfunctions, it's essential to inspect the SIM module, verify the flex bridge, and finally, examine the motherboard. We maintain a systematic approach to all repairs, starting from the bottom up.
Under the microscope at 2:43, we closely observe the reader's pins for breaks or internal mechanism issues. As we move on to the FPC connector, we search for signs of moisture or damaged tracks. Everything appears fine, so we continue to the motherboard at 3:36. Here, we find evidence of tampering and missing components near the FPC connector.
After removing the motherboard at 4:41 and taking measurements, we utilize a paid software to identify three missing resistors at 4:58. It's crucial for mobile repair technicians to invest in such tools. At 5:29, we measure a 50-ohm resistor and recycle three resistors from old circuit boards at 5:41. Using a JBC precision air station, we solder the components at 6:03.
Our technical service charges approximately 70 euros for this repair, and we offer nationwide pickup and delivery through Correos Express. After reassembling the device at 7:50, we test both SIM card slots at 8:32. With this solution, the device is successfully repaired. I'm Leonardo, thank you for watching today's video, and see you in the next one. Cheers!
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