HUAWEI TECHNOLOGIES CO., LTD.
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4.2.3 Maintenance Instances
Instance 1: startup failure
Symptom: Startup failure and failure to perform startup
Fault analysis: Connected the power supply directly and pressed the startup key. The startup
was normal. It was discovered that it was caused by the battery power was too low.
Solution: Charged the battery for a long time through the mobile phone. It was fully charged when
the power of the battery reaches the voltage of battery over-discharge.
Instance 2: Charger startup failure
Symptom: Startup failed after the charger was connected.
Fault analysis: Measuring of the VCHG voltage showed that it was only 2V or so. Finally found
CN701 was poor soldered.
Solution: Re-solder CN701.
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