No signal

[Eireannisla]

Help! Just bought my first ever desk top computer, knowing nothing about computers, I have connected all leads from monitor to the computer and power supply, when I turn the computer on a message shows 'no signal' next to DVI and VGA - everything is connected though, what am I doing wrong?

[spunk.funk]

You probably have a separate video card further down and you are plugging the monitor into the onboard VGA port that is up higher

[Eireannisla]

I thought so, but the cable that came with the monitor does't fit, it only fits the port thats marked VGA, and same sized on the other end in the computer. Should I get a different cable that fits the port marked 'DVI' instead?

[spunk.funk]

If you can take a picture of the back of your computer showing the Video card and attach it in your next post, that would help in the assist. If your video card only has DVI and does not have a blue VGA port, you can get a VGA-DVI adapter. Also, see if your monitor has a DVI out, then you would need to get a DVI cable to go from monitor to video card.