How to repair Redmi K30 Pro when it is started and restarted?

How to repair Redmi K30 Pro when it is started and restarted?

Redmi K30 Pro starts the machine, lights up the LOGO, restarts it automatically, and repairs the fault after redoing the CPU.

Machine model: Redmi K30 Pro

Fault phenomenon: The customer described that Redmi K30 Pro started automatically and restarted, but it could not start the machine.

Maintenance process: get itmobile phonePress the power button to start the test, the phone will automatically restart after the LOGO is lit, and the system operation interface cannot be accessed.

Redmi K30 Pro boot restart Figure 1

Redmi series mobile phones have failed to restart repeatedly when the LOGO is turned on, which is usually caused by problems with the battery, CPU or font. After testing, the battery problem was eliminated, and according to the previous maintenance experience, it was speculated that the probability of virtual welding of CPU was high, so the CPU was removed and redone.

Redmi K30 Pro boot restart figure 2

Redmi K30 Pro boot restart figure 3

After the CPU is redone, the test current of the power supply of the repair machine is normal. Reinstall the motherboard into the mobile phone, press the power button, and the mobile phone can be turned on normally to enter the screen lock password interface. After many times of power-on and power-off tests, there is no LOGO restart phenomenon, and the fault is perfectly repaired.