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22LH250C (CHASSIS:LD91Z) - LG TV Service Manual (repair manual). Page 57

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Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace MAIN B’D IC 100
MAIN B’D JACK Check
JK600 -> HDMI1
JK601 -> HDMI2
YES
※ This case is that HDMI Video doesn’t display at the some HDMI input, not all.
Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
HDMI1 or 2  No Video Problem
HDMI1 – ALL MODELS
HDMI2 – Except for 19/22LH250**
19~42LH250C
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