Read LG 42SL90QD-DA (CHASSIS:LT91L) Service Manual online
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace MAIN B’D IC 100
Check the ADJUST MENU
EDID OK ?
YES
Download EDID
(Refer to Adjustment Spec)
NO
NO
Replace
MAIN B’D IC601 (HDCP KEY)
Making
전자 - 6-2
Revision
2009. 2 . 1
11/25
LCD TV
Symptom
HDMI 1~4 All No Video Problem
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