Retrevo.com has manuals for televisions and other electronics available for download. Under the Manuals tab, select TV, and then select the manufacturer. From here, you will be able to find manuals for a variety of models made by each manufacturer. Manualslib.com is another online database of electronics manuals.
Manualslib.com works like a search engine. Type in the manufacturer and model to search for a manual, or select a manufacturer from the A to Z section of the website. Manuals may then be viewed online, or downloaded and saved as a PDF file. If you want a television manual for a model made by a manufacturer that is still in business, you may also be able to find a free manual on the manufacturer's website.