Main Lcd Trouble - LG -P715 Service Manual

4.16 Main LCD trouble

Main LCD control signals are generated by MSM8225.
Those signal's path are :
MSM8225 -> LCD Module
LCD display OK?
Yes No
Change the Main BD
LGE Internal Use Only
Press POWER key to turn the power on
Is the circuit powered?
Disconnect and reconnect
LCD connector
LCD display OK?
Check VREG_LCD_2.8V(TP1)
VREG_MSME_1.8V(TP2) is OK?
No
LED_A(TP3), LCD_RESET_N(TP4) is High?
LCD_VSYNC_O(TP5) is 60Hz?
MIPI Signal ESD Filter (FL5002,FL5004)
Change the LCD module
The LCD works
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4. TROUBLE SHOOTING
Start
No
Follow the Power ON trouble shooting
Yes
No
Yes
END
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Yes