Read LG 42LK452 (CHASSIS:LB01M) Service Manual online
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6. RGB Video
Check input signal format.
Is it supported?
Check RGB Cable conductors
for damage or open conductor.
Check EDID
I2C Signal
R138, R139(SDA,SCL).
Check JK1104
H/V_Sync/R/G/B Signal Line.
ok
ok
ok
No
No
R
e-download EDID data ,Replace Mstar(IC101) or Main Board.
ok
Replace Jack.
Check DSUB_DET.
Replac e R1146 or R1147.
No
Check Mstar LVDS Output.
Replace Mstar(IC101) o r Main Board.
ok
No
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