Cool deal, Goto your local wal-mart, radio shack, Best buy or local computer store an purchase a HDMI cable. Look at seeral different types as far as connectors go and the length as well. I have both 6 and 12 foot, black sheathed with the gold color to the connectors, Copper connections have a tndancy to andonize real quick and go bad. now for the tecky part, open your control panel (model depending) and check for the display properties. There should be something there for display to monitor. Set your tv to the hdmi input and play around with the comptuer settings. I would put in a dvd first and then see if I can get it to the tv screen.
All else fails, check your computer OPS manual and the OS manual for the technical settings.
Good Luck!