When phone is not switching on, first change the battery if the phone is not used for long time.May be current in the battery is dropped down for not using it for long time.If the phone is used regularly, and phone is not switching on, Insert the charger and check whether the phone is entering into charge mode or not. If the charge process is on and indication is shown, the problem will be with power switch circuit of the mobile phone.
The technical reason behind this is, almost every cell phone circuit will have minimum two modes of powering on. One is with power switch and the other is with charger insertion. When charger is inserted, some part of the powering process is on.So when cell phone is on with charger insertion, but is not switching on with power switch operation, power switch circuit should be suspected. Contact a qualified cell phone technician for further repair.
More solutions will be posted about “phone does not switch on” problem in coming posts..
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