LG 42lk530 Service Manual page 58

7. Trouble shooting - No video (HDMI)
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check HDMI Switch
IC701 video Signal and I2C line
Check JK70 1 / 2 / 3 / 4
Check HDMI Signal output
of HDMI Switch (IC701)
Check BCM LVDS Output
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Only for training and service purposes
ok
ok
No
ok
No
Replace Jack
ok
No
Replace the defective IC.
ok
No
Replace BCM( IC101) or Main Board.
No
Check L2103(+3.3V)
OK
Replace Coil
Replace the defective IC.
LGE Internal Use Only