LG 37LV3500 Service Manual page 45

6. RGB Video
Check input signal format.
Is it supported?
ok
Check RGB Cable conductors
for damage or open conductor
ok
Check EDID & EEPROM
IC1105 I2C Signal
R1141, R1143(SDA,SCL)
ok
Check JK1104
H/V_Sync/R/G/B Signal Line
ok
Check DSUB_DET
ok
Check Mstar LVDS Output
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Only for training and service purposes
No
Replace the defective IC or re-download EDID data
No
Replace Jack
No
Replace R1146 or R1147
No
Replace Mstar(IC100) or Main Board.
LGE Internal Use Only