Received an iPhone 6 from a user, reporting a fault of not powering on. Upon disassembly and power testing, it showed a high current draw, and the phone could display the white Apple logo. Since there was a high current, some area would heat up. After disassembling and inspecting the motherboard, it was found that the area near the WiFi module was severely heated, causing the solder to melt. The solder on the WiFi chip melted first, so I decided to remove the WiFi chip and replace it with a good one. After testing again, it powered on normally, and the issue was resolved.
