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42LV375H-ZA (CHASSIS:LD03X) - LG TV Service Manual (repair manual). Page 17

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