You shouldn't give up that easily
If it's onboard graphics, and there's no display device detected, try the following first:
Go to your system (manager), hardware manager (dunno exactly how these are called on english OS). This should look something like that.
[img]
http://www.khuris.fieses.net/images/systemmanager.png[/img]
Look for the option where it says "graphics card", and open it. If there is no such entry, or the name is blank, then you definately got no correct graphic card drivers installed.
If you got a name displayed, like in my example picture, look at the name. Like in my case, it's an NVIDIA-chipset based card. You can download drivers for it at
www.nvidia.com - if it is ATI, download them at
www.ati.com
If there is no card displayed, or you can not make sense out of the name, then you need to find out what mainboard you got in your computer, where the graphic card is installed onboard.
So, someone in your house probably bought that thing. Look if you got any manual of it left maybe. If so, get the name of the board and look at the manufactors website for graphic drivers for your boards name. If you are not sure where to search for, take the name of the board and try using
www.google.com
In case you got NO manual... you can try out finding out what kind of mainboard you got by either opening your PC's case and look at printings on the mainboard itself.
Or you try the following. You restart the PC, and right at the beginning, you get the BIOS loadup. This is when it initialises things like the hard disks and the cd-rom and such. When you got that screen (immediately after turning on the machine) hit the PAUSE-key on your keyboard. It should let the screen freeze normally. Then, look at the screen for information. There's usually the boards name and it's version printed somewhere on top of the screen. If you are unsure what it might be, best type all down and then google for it. Sometimes works wonders

If you find out the board type, again, look at the manufactors website for graphic card drivers for the onboard chip.
I know this might sound difficult, but you might wanna give it a try
