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Assuming you are running windows 7: if you go into your control panel there is a menu for adding a display device, you want to choose connect to external display, when you get into that menu, there should be a dropdown where your computer will have auto detected the projector, select your projector from the list, then just below that I believe you want to choose the option to duplicate on both screens. Sorry if this isn't clear enough, but I'm on my older computer still running XP and I still havent been able to figure out how to use multiple display devices with this OS.
Have you tried the "Function and F key" trick? On most laptops it's the F6 key but on your unit look for a picture/graphic of a computer screen...or maybe text saying, "LCD/Monitor". To activate this function you must press and hold down the blue "function" key and also press the F6.
The F6 key has three states...1 - only laptop screen, 2 - only external monitor (video projector), 3 - both the laptop screen and the externally connected monitor and/or video projector.
unscrew the lamp door on the bottom of the projector, unscrew the lamp, remove the lamp, replace with new lamp, screw in, replace door, turn on, and reset lamp counter (menu-settings-lamp counter reset-yes)..
Hello. There is no "device" needed to connect the units together...You'll need a cable that is"mini display port to vga". In order to connect the projector to the laptop, the cable has to have the special Apple connector which fits into a specific socket on the back of the laptop. The other end is just a standard vga connector which is plugged into the computer input on the projector. Hope I helped you!
Don't forget to select the Fn key and F4 on HP laptops. It could also be the Fn key and F8 depending on the laptop brand. It is the apple key and the F7 key on a Mac notebook. On Laptops this will toggle the video to the aux port where the monitor cable connects to the projector. There are 3 modes. video on the laptop screen, video on the laptop and projector, or video to the projector only.