1.
1.1
1.2
2.
2.1
Main board top view ...................................................................................................... 10
2.2
Main board bottom view ............................................................................................... 11
3.
Troubleshooting Procedure ..................................................................................................... 12
3.1
No boot ......................................................................................................................... 12
3.2
3.3
Charging anomaly ......................................................................................................... 14
3.4
3.5
Speaker has no sound .................................................................................................. 17
3.6
LCD has no display ....................................................................................................... 18
3.7
Phone crash .................................................................................................................. 20
3.8
Key has no effect .......................................................................................................... 21
3.9
3.11
Microphone has no effect ............................................................................................. 24
3.14 Speaker tone smaller .................................................................................................... 27
3.15 No charging................................................................................................................... 28
3.16 Camera has no effect ................................................................................................... 29
3.17 Auto shutdown .............................................................................................................. 31
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