LG 42LV375H Service Manual page 17

7. HDMI 1/ 2 Video Trouble Shooting guide
- HDMI 1
Is Video input normal?
JK800
Y
Check 5V_HDMI, HPD line.
Y
Check DDC communication line
JK800 Pin 16, 17
Y
Replace IC100.
- HDMI 2
Is Video input normal?
JK802
Y
Check 5V_HDMI, HPD line.
Y
Check DDC communication line
JK802 Pin 16, 17
Y
Check Switch IC(IC800) output
signal.
Y
Check the IIC line IC800 to
IC100.
Y
Replace IC100.
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Only for training and service purposes
N
Check the input source & HDMI
cable.
N
Check the HDMI Cable.
N
Check the EDID data.
N
Check the input source & HDMI
cable.
N
Check the HDMI Cable.
N
Check the EDID data.
N
Replace IC800.
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