Ed would like to connect his Windows laptop to a 40" TV. Leo says that if the monitor has an HDMI connector, and his laptop has HDMI, he's golden. He may need to go into his display settings to mirror the image out through HDMI to the monitor. That way it's sending it out.
If he's on a later version of Windows, the key stroke is + P. If he's changed the settings and the TV doesn't adjust, he should try unplugging the port to the TV and plug it back in. That will reset it so the TV will read it. He may also need to change his resolution to a lower setting.