I hace a pc cab i connect it to the goodmans x pro

Cant see why not if you have a VGA (usually blue 15 hole (3x5 rows) connection on the Plasma TV, it should be ok. Connect the VGA cable to your PC and then to the TV, then power both up, Search through you TV Sources till you find VGA or sometimes AUX and you will see your PC booting up as normal. Also you might want to put sound to the tv too, in which case you'll need a 3.5mm jack lead at one end (into the sound card Green Jack Socket), to what ever the sound input is on your TV, usually the same 3.5mm Jack. If you want to still use your PC monitor too, you will need a VGA Y splitter, only a couple of quid off ebay, and another VGA cable, about the same price. Hope that's of use to you.