I have an rca tv and a hp slimline computer.
Hmmm maybe be tough to do that depending on the age the TV. If you want I can hit you by pms and try to walk you through it. As in anything trying to get newer tech to work on older tech is a nitemare. If the two were close it is just a matter of a cable.
I have never tried but....you may be in luck mate.
http://www.pcworld.com/article/256058/stream_media_from_your_pc_to_your_roku_box.html
Most of these just pull data from the computer/server not exactly a screen display type. If you are looking for watching you pics and movies from you computer then yes... If you are looking to play video games that may take some work but it should be possible just depends on your gear.
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