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This would indicate that the display settings on the PC are outwith the acceptable range of the projector.
To solve this, right-click on a clear part of your PC desktop and select "Graphics Properties" (in Vista). You then need to adjust the display settings. That is a very old projector which will accept a maximum screen resolution of 1024 x768 pixels. Try changing that 1st. If it doesn't work, keep that screen resolution and also adjust the refresh rate in Hz until you get an image.
The native resolution of that projector is SVGA (800 x 600 pixels).
The setting you are looking for is called mirror. If you go into your menu, you should be able to find it. I'm not fmailiar with that exact model, but Hitachi is very good about keeping their projectors consistent where the menu/options are concerned. Once you find the mirror section, cycle through the options (there will be 3 or 4) until you find the one you need. If your projector is hanging upside down from the ceiling, select the ceiling option.
Often you will see that you have lots of options in your menu that appear grayed out. This occurs when you do not have an input device connected to your projector.
In order to have access to all the menu options, simply connect an input device (TV,DVD player, computer, etc) to your data projector and start the projector.
Assuming everything works properly, if the projector starts receiving a signal, you will have all your menu options available.
I'd also note that image discoloration can also be caused from defective/damaged cabling, cables not being connected fully, bent pins depending on the type of cables you are using, and also for internal problems. If you can not adjust your settings to achieve satisfactory color, check your cables for damage and make sure they are all connected properly.
It does sound like this is an alignment problem of the blue LCD or a problem on the main board controlling it. I am not sure if this is a field adjustable unit. A call to the authorized service center should provide that answer.
Hitachi data projectors are able to function as a mouse using either the USB port or the control port located on the back of the projector.
However, they are not intended to be used as a remote presenter. This means that although you can use the remote as a mouse, you will not be able to change slides in a full screen slide show using powerpoint.
I recommend the Targus remote presenter for this purpose. This device will function as a mouse, pointing device, and will allow you to change slides in powerpoint. In addition, it's inexpensive, wireless, and small enough to easily fit in your pocket.
one or more of the fans may not be working properly and the heat is triggering the temperature sensor. if the projector is too dusty, the heat stays in and may ruin components. if there are filters, clean them first.