LG FB163U Service Manual page 50

3. USB PART
TURN ON USB
"Searching" or
"USB" Display check.
Reading OK check.
OK
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Only for training and service purposes
YES
YES
YES
NO
Check the POWER supply circuit.
Check the HRST#signal.
Check the HRST#signal.Check the USB PART
and DVD PART line.
NO
Check the USB JACK POWER supply.
Check the USB DATA LINE. (PN205)
Check the ES8390.
Check DATA LINE PIN 91(USB-No)90(USB-Po)
3-37
(Check PN102)
YES
YES
(Check PN205)
YES
YES
LGE Internal Use Only