LG 55G2 Service Manual page 73

7. Trouble shooting - No video (HDMI)
Check input signal format.
Is it supported?
ok
Check HDMI Cable conductors
for damage or open conductor.
ok
Check HDMI Switch
IC3201 video Signal and I2C line
ok
Check JK3202 / JK3200 / JK3201 / JK3203
ok
Check HDMI Signal output
of HDMI Switch (IC3201)
ok
Check L9 Ace (IC101)
ok
Check L9 D-chip (IC100)
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Only for training and service purposes
No
Check L3200(+3.3V)
No
Replace Jack
No
Replace the defective IC.
No
Replace IC 101
No
Replace IC 100 or Main Board.
No
Replace Coil
OK
Replace the defective IC.
LGE Internal Use Only