LG 55G2 Service Manual page 80

14. Trouble shooting - Ethernet connection error
Check LAN Cable
Y
Check MAC Address
Y
Check LAN Port JK 5000
Y
Check PHY IC 5200
Y
Check RMII Rx/Tx Signal Line
R 5206 / R 5207 / R 108 / R 106
Y
Check L9-D chip IC 100
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Only for training and service purposes
N
Recheck
LAN Cable
N
Replace
Main B/D
N
Replace LAN Port JK 5000
N
Replace PHY IC 5200
N
Replace R 5206 / R 5207 / R 108 /
R 106
N
Replace IC 100 or Main Board
LGE Internal Use Only