3. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
3.13 LCD
Main LCD control signals are generated by MSM8926. Those signal’s path are :
MSM8926-> LCD Module
Is the circuit powered?
LCD display OK?
Press power key
To turn the power on.
Yes
Yes
Yes
Yes
Yes
Start
Disconnect and reconnect
LCD connector.
LCD display OK?
Check
+2V8_VREG_L15 (C7101)
TP1
+1V8_VREG_L8 (C7103)
TP2
OK?
Change the LCD module.
LCD display OK?
No
No
No
No
End
Follow the power on
trouble shooting.
Change the PM8926 (U4100) or
main BD.