This is a manual that should help you, it may even be your model but, it shows hook ups and has a page about the Simplink:
http://www.lg.com/us/support/product/support-product-profile.jsp?customerModelCode=37LH30&matchedModelCode=1000009240&searchEngineModelCode=37LH30&initialTab=documents&targetPage=support-product-profile#
Scroll down to manual, ckick on the one you want, and open. Typically, you would want to hook all video related units directly to TV, via HDMi, Component, RCA, etc., with the componenet video, you have to also have an audio cable, because the componenet does not carry sound. In other words, you want to hook things like, cable/sat box, DVR, etc., directly to TV then, use your digital optical out from tv to digital optical in on your home theater. You use your TV's menu to select what you are watching and you only have to use the one input setting on receiver to listen to all. If you try to route you units through the home theater system first, you may not get the best results and you may expierience lags between the video and audio.
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