What videocard is in that laptop? Are you running dual displays? or are you just displaying your desktop to TV? If you are trying to use a TV as a means to view your desktop and surf and stuff, forget about it. TV's won't give you any clarity for a number of reasons. If you just want to use it to run videos and movies on, it's perfect. Anything else, is terrible...
Try playing around with your display settings. Also a TV's refresh rate isn't that good / compared to a monitor.