We have installed the Mitsubishi XD206U into a ceiling mount, and are using a desktop (Dell Optiplex745) to 'drive' it. The desktop has only a digital monitor input, while the projector has only an RGB. We purchased a special splitter from Dell as well, that allows all of them to connect together at the back of the computer. However, this arrangement will not allow "mirroring" (the exact same image on the projector and the screen), only extended desktop. If we turn off the extended desktop function, it turns off the desktop monitor, so only the projector works. No matter what we try we can get neither the projector to stop being the primary monitor, nor can we get a mirroring effect to use on both monitor and projector. Any advice would be greatly appreciated.

Mirroring may require the same resolution on both displays, which probably is beyond the capabilities of the computer display. That said, if you are truly using a splitter then I would think the only type of image you COULD get would be a mirrored image. Are you sure it isn't just some type of adapter? Are there one or two video ports on the Dell? If two, are you using both?

To answer the questions, we set the resolutions to 1024x768, the lowest that both of them had that matched. No difference in the problems. The splitter we are using is specifically labelled, "Dell DVI to DVI/SVGA Splitter Cable WU329." I like this question because it brought up the same one I had. In another room here we have a projector with a a simple VGA splitter (since that computer has a VGA display port on the computer). That one does not even recognize that there is a projector attached to it. Yet, this DVI/SVGA one sees both of them. And, no, there is only the single DVI display port on the back of the Dell Optiplex745 desktop.

Sorry, this is out of my area of expertise. Can't Dell or Mitsubishi help?

We spent hours on the phone with Dell. They claim everything is right on their end, and finally told us to call Mitsubishi. We called Mitsubishi, and within thirty minutes they claimed it was a driver error, and were done with us. We have the driver they said we needed so it has to be something else. And I agree, this is so out of my expertise.

Your solution may be to add an inexpensive graphics card with two of the appropriate outputs on it.