LG 32LG2100 Service Manual page 57

LCD TV
Symptom
Check Signal format
Is it supported?
YES
Check the HDMI Cable
YES
MAIN B'D JACK Check
JK600 -> HDMI1
JK601 -> HDMI2
JK602 -> HDMI3
YES
Replace MAIN B'D IC 100
_ This case is that HDMI Video doesn't display at the some HDMI input, not all.
HDMI1 or 2 or 3 No Video
Problem
Making
Revision
HDMI1 – ALL MODELS
HDMI2 – Except for 19/22LH20**
HDMI3 – Except for 19/22LU40**, 19/22LU50**, 19/22LH20**
2009. 2 . 1
17/34
26~42LH2000
32~47LH3000/LH4000