Read LG 47SL90QD-AA (CHASSIS:LB91L) Service Manual online
Making
Revision
2009. 2 . 1
12/25
LCD TV
Symptom
HDMI1 or 2 or 3 or 4 No Video
Problem
Problem
Revision
Problem
Check Signal format
Is it supported?
YES
Check the HDMI Cable
YES
Check MAIN B’D IC600
MAIN B’D JACK Check
JK600 -> HDMI1
JK601 > HDMI2
JK601 > HDMI2
YES
JK601 -> HDMI2
JK602 -> HDMI3
JK603 -> HDMI4
JK602 -> HDMI3
JK603 -> HDMI4
YES
Replace MAIN B’D IC 100
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