There should be an S-Video output on your laptop. First, you will have to make sure your TV can support the S-Video format. If not, you will need to buy a convertor. Then, you will need an S-Video cable. The cable, and the convertor if necessary, should be easily found at a local electronics store. Then, just plug one end of the cable into the TV and the other end into the computer. Then, tune the TV to the input channel, and it should work.
There is one thing that might be a problem. The S-Video out on the computer might be a different size than the regular S-Video ports on TVs, but I doubt it.