Redmi K30 suddenly crashes in use, and it is not started for maintenance after restart

Redmi K30 suddenly crashes in use, and it is not started for maintenance after restart.

When the mobile phone is turned on, the flower screen is found. Due to the universal tin-planting steel mesh, the CPU is removed again, and several spots are found to be soldered. After reinstalling the CPU, the mobile phone is turned on normally, and all functions are tested normally. The maintenance is over here!

Model: Redmi K30 Extreme Edition

Fault phenomenon: restart without starting the machine.

Maintenance process:

Received a Supreme Edition Redmi K30, the fault description is normal use, it suddenly gets stuck and crashes, and it will not be turned on after restart. The startup current of single board dismantling is about 200mA, and virtual welding of Redmi K30 Extreme Edition CPU is a common fault.

Redmi K30 suddenly crashes when in use, but it is not started up after restart. Figure 1

Dismantle and replant CPU.

Redmi K30 suddenly crashes in use, but it is not started up after restart. Figure 2.

Redmi K30 suddenly crashes in use, and it is not started up for maintenance after restart. Figure 3

The test found the mobile phone flower screen.

Redmi K30 suddenly crashes in use, but it is not started up after restart. Figure 4.

Due to the universal tin-planting steel mesh, the CPU was removed again and several spots were found to be soldered. The reinstalled CPU started normally, and all functions were tested normally. The maintenance is over!

Redmi K30 suddenly crashes in use, but it is not started up after restart. Figure 5.