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HUAWEI Mate 30 can’t be turned on,How to repair
Machine model: HUAWEI Mate 30
Fault phenomenon: in the normal use of the mobile phone, suddenly can’t turn on, charging does not respond.
Repair process: after getting the machine, first start the test, press the power on button, the phone does not respond.
HUAWEI Mate 30 can’t be turned on Figure 1.
Power on directly Short circuit, and the two terminals are also in Short circuit state.Power on 1.8V at the two terminals, start Current heating test, and find the small board high temperature.Tear up the heat dissipation sticker, smoke Colophony (Solder), power on,Capacitor will melt instantly.
HUAWEI Mate 30 can’t be turned on Figure 2.
If auto power off is deducted, the fault still exists.It is still in Short circuit state.Continue to Current heating test, found that the coder power amplifier chip is damaged.
HUAWEI Mate 30 can’t be turned on Figure 3.
The coder chip on the coder was removed and replaced.After replacement, the mobile phone can be turned on normally and the fault can be repaired perfectly.
HUAWEI Mate 30 can’t be turned on Figure 4.
