Depends on the video and sound inputs available on the TV and the video and sound outputs available on the laptop. And then when using the right cables, you have to know how to activate those outputs on the laptop.
It can be easy and it can be impossible.
I have a Vizio lcd tv and need to hook up a laptop (owned by someone else, not sure what kind) to the tv for a presentation to be made from the tv. How can I do that?