Not asking for a video Barry. Asking for you to post the NAME and MODEL of your computer motherboard and video card. If you are using motherboard integrated graphics and no graphics card, that is also relevant. If you are using an all-in-one computer, then the manufacturer name and specific model and number.
Can we also assume that the tv works when connected to a different source? (cable tv box, dvd player, game console, etc) Anything that will output a signal to test the inputs of the tv.