if your laptop has a vga out you can get a splitter that lets it go to the RGB connectors on the tv,
if your laptop has a dvi out you can either plug it in or get a converter that goes from dvi to hdmi.
if your laptop has an hdmi out you can just plug it into your tv.
if you have a displayport out you can get a "passive displayport to dvi" or "passive displayport to hdmi" adapter
oh and its HDTV with a D