4. TROUBLE SHOOTING
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4.14 Main LCD trouble
Main LCD control signals are generated by MSM7227A. Those signal’s path are :
MSM7227A-> LCD Module
Press PWR key
turn the power ON
Yes
Follow the Power ON
trouble-shooting
No
START
No
No
Change the Main Board
Yes
END
Yes
Check Power
VREG_LCD_2.8V
VREG_LCD_1.8V
Yes
The LCD works
Disconnect and reconnect
LCD connector
Is the circuit powered?
LCD display OK?
Change the LCD module