LG 40LH5300 Service Manual page 16

4. Component Video
Check input signal format.
Is it supported?
OK
Check Component Cable
for damage or open
conductor.
OK
Check JK401
Y/PB/PR signal Line
OK
Check COMP_DET
Signal
OK
Check Mstar LVDS
Output
5. HDMI Video
Check input signal format.
Is it supported?
OK
Check HDMI Cable conductors
for damage or open conductor.
OK
Check EDID
AR102, AR101, AR410, AR411 I2C
Signal
OK
Check JK403, JK404
OK
Check HDMI_DET (HPD)
OK
Check HDMI Signal
OK
Check Mstar LVDS
Output
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Only for training and service purposes
NO
Replace Jack
NO
Replace AR401or R109
NO
Replace Mstar(IC101) or
Main Board.
NO
Replace the defective IC or
re-download EDID data
NO
Replace Jack
NO
Replace R418, R410,
Q400, R419
NO
Check other set
If no problem, check signal line
NO
Replace Mstar(IC101) or
Main Board.
NO
Replace Main Board
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