First of all, here is the main ONLINE SUPPORT page for your model:
http://www.lg.com/us/support/product/support-product-profile.jsp?customerModelCode=37LC7D&matchedModelCode=1000002391&searchEngineModelCode=37LC7D&initialTab=documents&targetPage=support-product-profile
To view the Support Page just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information at the website indicated.
To download and view the OWNER'S MANUAL click on the MANUALS AND DOCUMENTS tab and then OWNER'S MANUAL- ENGLISH (2,290K) button. Then just SAVE it on your computer somewhere like the DESKTOP so it will be easy to find later. When the file finishes downloading then click OPEN and the you can view the manual.
You may need ADOBE READER installed on your computer to read PDF documents. You can download this free at
WWW.ADOBE.COM if necessary. Click on the DOWNLOAD ADOBE READER button on right side of the ADOBE home page when you get there, and then just follow the onscreen instructions to install it.
See page 10 of the USER'S MANUAL for a detailed illustration of the connections on the rear panel your TV. The set is fitted with analog and digital AUDIO OUT connectors.
See page 31 for a detailed description of the AUDIO OUT connection process.
Please comment back here to this page if you have any questions, have difficulty accessing the links, or just require further general assistance and I will respond as soon as I see it.
Thank you very much and good luck.
Joe.