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42LH90QD (CHASSIS:LT91C) - LG TV Service Manual (repair manual). Page 68

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HDMI Video OK ?
YES
Check the ADJUST MENU
EDID OK ?
YES
Download EDID
(Refer to Adjustment Spec)
NO
Check the HDMI Cable
Replace MAIN B’D IC100
YES
Making 
Revision 
2009. 2 . 1
21/25
LCD TV
Symptom
HDMI-DTV No Audio Problem
34
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