Your system may already be capable of transferring info from computer to tv
screen.
Check to see if your tv has an S-video input - more recent tvs will have
them. My apple computer has a video out port. There is a little picture of a
screen
next to it. It came with an adaptor for the s-video cable. (If not then you
should be able to order from an apple supplier). Then I just connected an
s-video cable from the adapter to the tv. These cables are available in
electronics departments or stores. No software was necessary. Anything on my
computer screen appears on the tv.