LG 42lk530 Service Manual page 57

6. Trouble shooting - No video (RGB-PC)
Check input signal format.
Is it supported?
Check RGB Cable conductors
for damage or open conductor
Check EDID & EEPROM
IC3802 I2C Signal R3811, R3812(SDA,SCL)
Check P3801
H/V_Sync/R/G/B Signal Line
L3806/7/8
Check DSUB_DET
Check BCM LVDS Output
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Only for training and service purposes
ok
ok
No
Re-download EDID data or Replace the defective IC
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No
Replace Jack
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No
Replace R3815
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No
Replace BCM( IC101).
LGE Internal Use Only