LG 37LC4R Manual De Servicio página 22

5. In case of becomes unusual display from rear AV mode.
Is video input of
the A/V jack normal?
(Check R172)
Yes
Sam as Block A
6. In case of becomes unusual display from Side AV mode.
Is video input
of the A/V jack normal?
(Check CN703
Pin9)
Yes
Sam as Block A
7. In case of becomes unusual display from Side S-Video mode.
Is video input
of the A/V jack normal?
(Check CN703
Pin9)
Yes
Sam as Block A
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Only for training and service purposes
No
Check the input source.
No
Check the input source.
CN703
Pin 11
No
Check the input source.
CN703
Pin 1,3
- 22 - LGE Internal Use Only