I have no documentation, nor disk, for my video card. I can't remember who the manufacturer is.?

My device manager says it isn't working, but doesn't tell me what kind of video card it is. Do I have to open the case and physically look at it to know?|||download a program salled siw (system information for windows) it tells you absolutley everything not only will it tell you the name of your card but it will also troubleshoot it and see if that is your problem!|||i suppose you could, at least you will be able to know the manufacturer is , most likely it is on board anyway, best option is to buy a PCI add on peripheral