LG LST-4200A Service Manual - Page 33

VIDEO part - problem

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4. VIDEO part START YES NO There is no HV sync OUT? YES NO Is there problem at OSD? YES NO Is there problem at Main Picture? YES NO Is there problem at AV output? YES END (A) (B) What is the main picture source? (C1). (C2). (D) 3-24

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3-24
4. VIDEO part
There is no HV sync OUT?
START
Is there problem at OSD?
(A)
NO
(B)
NO
YES
YES
Is there problem at Main Picture?
What is the main picture source?
NO
YES
(C1).
(C2).
YES
Is there problem at AV output?
(D)
NO
END
YES