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Battery voltage
higher than 3.6V?
Press PWR Key
TP1: R9531 high to low?
Check MT6323 Proc Voltage level?
Check MT6323 PAM Voltage level?
Check MT6323 RTC CLOCK
Check Battery connector (CN9501)
LGE Internal Use Only
START
Yes
Yes
Yes
Yes
Yes
Yes
END
No
Change or charging the Battery
No
Check POWER_KEY S/W
No
L4130 (Check MT6323)
No
L4131(Check SKY77758)
No
No
Change MT6323 And Return to Start
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3. TROUBLE SHOOTING
R4130
Only for training and service purposes
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