Xiaomi 8 restarts repeatedly for repair

Machine model:Xiaomi 8

Fault phenomenon: the customer described that the mobile phone Restart repeatedly was turned on and could not be turned off. Pressing the volume increase button did not respond. When calling earpiece, there was no sound, only the hands-free voice was turned on.

Repair process: get the mobile phone test, found that the phone has no power, so plug in lighting cable to charge, mobile phone Restart repeatedly, there is no way to turn off.The common reason for this is that the power on key or motherboard is faulty.

Xiaomi 8 restarts repeatedly for repair Figure 1.

Open the mobile phone, remove the FPC, the phone can be normally turned on to enter the operation interface.After removing the boot key, it was found that water damage was replaced by corrode.

Xiaomi 8 restarts repeatedly for repair Figure 2.

So the boot key was removed and replaced with a new boot FPC.After installing the machine, press the power on key of the mobile phone,Xiaomi 8 can start up normally and enter the system. Troubleshooting and maintenance are finished.