It’s tricky to backlight a wall-mounted television; this clever design uses the USB port on the HDTV to provide power to a ring of LED lights.
In order to cut down on extra cables, keep the build flush to the HDTV and wall, and minimize the number of parts needed, Instructables user Selig Tobiason simply stripped a USB cable and connected LEDs to it. The end product provides a cool blue backlight for his HDTV with minimal cost, no extra power cables, and a clean look.
Hit up the link below for his detailed tutorial.
TV Backlight [Instructables]