ATI makes a nice external tv tuner, and its fairly cheap too. you are going to need one in order to watch tv on your m40 since you don't have a built-in card in the m40 for it.
look for the ATI TV Wonder USB 2.0 NTSC it shoud retail for about $150 canadian, but i have seen them for cheaper if you get a sale. Good luck and enjoy it. i hope that helps