If the vid card is on-board (on the motherboard), you might want to check with a local computer shop and see if they can lend you a cheapo PCI vid card. It'll have to be a low profile one for that machine, but it's one way to check if your I/O board (the section of the motherboard with the external connections) is shot. They do tend to die in those machines. They're not too pricey to replace, either. Do you know of any local computer stores you can trust?