SAMSUNG Galaxy S21 can't be turned on and cannot be charged. After charging the battery, the mobile phone can be turned on. However, when the battery is charged to 60%, the current will be very small or even zero. After the battery is replaced, the fault will be repaired.
After HUAWEI Mate 40 Pro Fall hard, the screen and shell glass cracked into spider webs. After dismantling the machine,Inductor was replaced and the CPU was replaced. The mobile phone can be turned on.
Redmi Note 9 Pro cannot be charged. It is found that The solder tin extruded exists in the charging Current protection tube, and it is broken down. Remove it directly and repair the fault.
HONOR V40 has no ringing when calling, and there is no sound when playing video. Replace it with a new boost Inductor and repair the fault.
iPhone 12 restarts repeatedly, it was found that there was a problem with the BTB connector 1 after the c1xt1 was removed and the system was removed.
Xiaomi 11 Youth version can not be charged,short-circuit Current protection tube, replace the charging chip, mobile phone charging normal, fault repair.
HONOR 50 water damage is serious and can not be started. After replacing the pm7325 power chip, the startup current is normal, but the screen does not display. Replace a VCC chip of the same model and repair the fault.
iPhone 12 has no baseband, the motherboard separate, middle layer REBALLING,welding, fault repair.
Xiaomi 12 water damage failed to be charged. When charging connector was disassembled, traces of water damage were found. After cleaning, the fault was repaired.
