LG D722K Service Manual page 107

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Check the Connection of uUSB and battery.
And battery should be standard type
Is the uUSB Cable voltage 5.0V
Yes
Is it charging properly After turning on?
LGE Internal Use Only
START
Connection OK?
Yes
Yes
No
Change the main board
END
No
Change I/O connector
No
Change TA (or uUSB Cable)
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3. TROUBLE SHOOTING
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