Power - LG -D620 Service Manual

3.10 Power

Battery voltage higher than 3.4V?
R4105 signal change from high to low?
Check PM8926's SMPS voltage level?
No
Is the X4100 signal normal?
No
Is the signal high at R4104, TP2100 ?
Phone doesn't boot yet?
Change the main board
LGE Internal Use Only
START
Yes
Press PWR Key
Yes
Is it normal voltage?
Yes
Check it's 19.2Mhz
Yes
Yes
Yes
No
Change or charging the Battery
No
No
No
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3. TROUBLE SHOOTING
Change CN10000
Change X4100
END
Only for training and service purposes