That HDTV also has a PC HDMI input, so I'd recommend using that instead of the HD-15 input. If your system does not have an HDMI (or DVI) output, you may want to consider purchasing a new graphics card that includes and HDMI output.
Really need more specs on your computer (Make/Model #, available outputs).
Not sure why (I suspect performance), but Wireless Media extenders have disappeared off the shelves of most big box stores.
-Wolf sends