Read LG 42LV3700-UD (CHASSIS:LA12B) Service Manual online
17. Trouble shooting - Ethernet connection error
Replace one of L3901
& Recheck
N
Check LAN Port Power
L3901
Y
Check LAN Port LED
N
Replace one of LAN Port
& Recheck
Y
Maybe LGE35230 LAN PHY block
has problems. Replace It
N
Check LAN Cable
Recheck
LAN Cable
N
Y
Check MAC Address
Replace
Main B/D
N
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