LG 42PC51 - Rear AV Input Display Issues; Side AV Input Display Issues; Side S-Video Input Display Issues

5. In the case of an unusual display in rear AV mode.
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Is video input of
the A/V jack normal?
(Check R172)
Yes
Sam as Block A
Check the input source.
No
6. In the case of an unusual display in Side AV mode.
Is the video input
of the A/V jack normal?
(Check CN703
Pin9)
Yes
Sam as Block A
Check the input source.
No
7. In the case of an unusual display in Side S-Video mode.
Is the video input
of the A/V jack normal?
(Check CN703 Pin1,
Pin3)
Yes
Sam as Block A
Check the input source.
No