4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
4.14 LCD
The LCD control signals are generated by MT6329. It needs three external powers like VIO, VCI and IO. And its interface is MIPI
having three data lanes and one clock lane.
START
Press PWR key
turn the power ON
The LCD works
Change the Main Board
Disconnect and re-connect
LCD Connector(CN400)
LCD display is OK ?
Is the circuit Powered ?
Yes
Yes
Yes
No
No
No
END
Change the LCD Module
Follow the Power ON
Troubleshooting
Check LCD Power
+3V0_LCD_VCI_MTK(TP1),
+1V8_LCD_VIO_MTK(TP2),
MIPI_CLK (TP3),
MIPI_DATA (TP4)
LM3639(U404) output LEDA(TP5)