LG U8290 Service Manual page 144

Start
Check t he pin and ba ttery
Connect terminals of I/O connect or
Connect ion O K?
Yes
Is the TA volt age 4.6V
Yes
Is it charging p roper ly
Af ter chang ing Q 500, Q502?
NO
Change the board
4. TROUBLE SHOOTING
NO
Change I/O connector
NO
Change TA
Yes
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END