Increasing resolution higher than 800x600

As a test, I would suggest setting the video resolution on the computer down to 800x600 or 1024x768 and plug the bad monitor back in. You do not have to turn off the computer to swap out the video cable between monitors. If the "bad" monitor works now, then it is most likely that some how the resolution or refresh rate got set to a mode the monitor did not support. If it is working, you can start increasing the resolution to higher numbers. Most OS's will ask if the new setting is OK and if you do not click OK it will go back to the original setting.

If the "bad" monitor does not work at 800x600 or 1024x768 then as suggested in a previous post, the monitor is bad. If it is really expensive, you can try and have it fixed. In most cases it is like a toaster, you can get it fixed but will pay double or more what you could buy a new one for.

Thanks, Jim

That refers to the PC's display settings. Use the Control Panel to set the display settings as suggested; 800x600 pixils, with 16 bits of color or higher.

First, with your pc connected to your current monitor, change the resolution to 800x600, turn off the pc, connect it to your tv via VGA or DVI, and turn on the pc, check your tv manual, seek the highest resolution supported and configure it ON PC. If the resolution is higher than your tv supports, will be no image.

Try a higher setting and reboot your computer.Take care not to connect the projector with power on either component.

This is due to the resolution set on your computer. change your resolution of the desktop from display property to less than 800X600.

This is an SVGA projector with a max resolution of 800X600. Even though it can accept higher resolution signals, they are scaled down to 800X600 which causes degradation and artifacting of the displayed image. Obviously setting your computer's resolution to 800X600 will result in the best image the projector is capable of. Standard definition video (480i, 480p, S-Video or composite) signals should also display very well. High definition signals like 720p and 1080i get scaled down to 800X600 with the same issues as a higher resolution computer signal.

One thing that can have a dramatic impact on the quality of your display if you are using Windows XP or Vista is tuning your ClearType settings here:

http://www.microsoft.com/typography/ClearType/tuner/tune.aspx

Without knowing any more about your system I can only give you a couple of general ideas.
First try updating to the newest video card drivers possible.
You can try going to the drivers tab in display adapters in device manager and click update drivers.
Failing this, if your system is more than a few years old you will probably have to update to a more current video card to get the resolution that you need.
The native resolution for your screen is 1280x1024.