LG L240 Service Manual page 59

4. TROUBLE SHOOTING
I/O Connector (CN401)
Is well-soldered?
YES
Voltage at pin 4,6 of Q101
YES
Q101,D101,R103
Is well-soldered ?
YES
Voltage across R103
Is about ~130mV ?
YES
Battery is OK?
YES
Charging is operating properly
START
NO
=5.2v ?
NO
NO
NO
NO
-
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Re-solder the CN401
(Pin 12,13)
The TA is out of order.
Change the TA
Re-solder
Q101,D101,R103
Replace Q101, D101
The Battery may have Problem
Change Battery
D101 R103
Q101
CN401
+