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Infocus Projector - synchronisation

When using my projector with my laptop (Vista) I experience error in synchronisation which results in the projector cycling through the interface input options searching for the computer. I have tried replacing the VGA cords always with the same result. I have also tried connection with another laptop (XP pro) and my desk top. I don't experience this problem from the desktop. I have connected an external monitor to my laptop and experience no dropout of signal. When connecting to the projector with a laptop there is a very lengthy period before synchronisation.

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  • Jumapa May 28, 2008

    I am already using 60Hz refresh rate which is the native resolution. The connection is VGA and the cable is about 1m in length.



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Please make sure you are using a resolution and refresh rate compatible with the projector as the sync circuitry in projectors can sometimes be a bit touchy. Also make sure the signal you are providing does not consist of a totally black on the edges as this can confuse the image processor in the projector.  I would suggest looking up precisely what is the native resolution of the projector and what refresh rate it likes, if in doubt use 60Hz. The refresh rate can be set in windows by clicking the "advanced" button in the display properties pane. the pull down for the refresh rate is under the "adapter" tab, or the "display" tab I haven't used windows in a while so I forgot.  If you are sure you are sending the native rez of the projector and still having issues then there may be an issue with something not described in your question such as distance to the projector or environment like dimmed lights causing signal noise. If this solution doesn't take care of things please post more details like are you using VGA or DVI. Good Luck.

Posted on May 27, 2008

  • Will Kibler
    Will Kibler May 28, 2008

    60Hz is the refresh rate. The native resolution would be a width by height kind of number. The panel itself inside the projector has actual pixels that equate to a native resolution. 
    FInding out the native rez and setting your output to that is mierely a good place to start. 



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