Redmi K40 restarts automatically (the bottom of the font is damaged)

Redmi K40 restarts automatically (the bottom of the font is damaged).

What is the problem with a Redmi K40 that can’t automatically restart into the system, which makes this Redmi K40 like this? Want to know the details, let’s have a look!

[Fault model] Redmi K40

[Fault phenomenon] Automatic restart

[Maintenance process] I received a machine sent by a customer for repair, the model of which is Redmi K40, and the fault is that it automatically restarts and does not enter the system.

Automatic restart of Redmi K40 Figure 1

Boot test found thatmobile phoneLogo restart, has been unable to enter the system, Redmi common fault CPU is easy to solder, first remove the CPU to redo, after the CPU is redone, the mobile phone is turned on with bright red exclamation mark, which is generally a problem with the font. As for why not make the font first, because the font of Android is easy to break down and is not resistant to high temperature, the risk of disassembling the font is greater than that of disassembling the CPU, so in general, we put the priority of the font behind the CPU and directly remove the font to read and write the bottom layer, which can read and write normally.

Automatic restart of Redmi K40 Figure 2

After writing the bottom layer, install and test the fault repair, and boot into the system normally.

Automatic restart of Redmi K40 Figure 3

[Maintenance result] After the motherboard is put into the shell, the mobile phone can be turned on normally. The functions of WiFi, Bluetooth, voice, charging, fingerprint, taking photos and making phone calls are all normal, and the maintenance is over.