Here is the one of the solution for cellphone that can be full flash but still will not power on or local mode. In this tutorial I encounter it in one my repair nokia 3230.
History: It was repaired from another cellphone repair shop. They only replace the battery terminal. it worked for an hour then suddenly it wont power anymore.
Procedure:
1. To be sure that the software is good I reprogram it using higher version of firmware available.
2. After flashing no local mode and the phone is still no power.
3. Carefully inspecting the terminal and using the multimeter I found out that BSI has no continuity. Using jumper wire I connect the BSI using the schematic diagram at jumper 136.
4. Now the phone has power then using software again full factory then mobile is perfectly working again.
see the missing connection below:
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