Find a cheap used stereo receiver. Hook the "A" L&R speaker outputs (red + black) to the connections on your speakers. Tune in some radio stations. Purchase a stereo audio cord with RCA plugs on one end and 3.5mm stereo plug on the other. Push the RCA plugs into the L&R Aux (or Tape) inputs on your receiver. Plug the 3.5mm plug into the "line out" on your computer and enjoy your music. If your TV has no audio out, you are at a dead end for that avenue.