|Tell us the make and model of your brand name system, or if you have a generic desktop system, the make and model of the mboard. |
The specific model of a brand name system is shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site and loading a program they have available.
For Dell computers, they have a Service Tag number - the specific model can be determined by using that on their site, or can often be determined there automatically by you downloading some software. The Service Tag number should be on a label on the outside of the case, probably on the bottom on a laptop, on the back on a desktop, and is often also shown in the bios Setup.
The model, sometimes the make, of a mboard in a generic desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.
When you are getting no video to a monitor, the display on the monitor is either black, or black with text on it e.g. "no Video Signal" or "Out of Range" or similar, or it's white.
If you have a desktop computer.....
If your computer has more than one video port a monitor can be plugged into, if there is a port or ports high up on the back of the case where most of the ports are, and one on more lower down in a card slot space, in most cases you will NOT get any video from the ports higher up on the back of the case. You must plug the monitor's video cable into a port in a card slot space lower down.
If you have the opposite case - you get video from a port high up but not from a port lower down, then your mboard has a Hybrid video feature - you need to connect the monitor to a port higher up, then go into the bios Setup and change the Primary video or Intialize video first or similar setting to PCI-E , Save settings. Then you will have video from a port in the card in the slot space lower down.
If that doesn't help, if your monitor has a VGA connector on it's video cable, and if you are using a DVI to VGA adapter to connect to a DVI port for your onboard video (higher up on the back of the desktop case), some mboards have onboard video DVI ports of a type that WILL NOT work with a DVI to VGA adapter.