Thin vertical line appears on projector

I have found that vertical lines that suddenly appear from projectors are due to poorly connected cables. Sut off your projector and wait for the fan to go off. Then unplug the connectors from the computer to the projector and secure them again, making sure to go all the way. Hope this helps.

Hi Martin103

This is a typical BenQ Mp Series problem , and will notice that it will start of intermittently , but later on the white line will appear every single time.

This can only be fixed by replacing the Mainboard of the MP710/720/721

My Benq PE7700 projector is now displaying thin vertical black pin stripes anywhere there is white or extremely light colors in the image. As the light colored images move (ie headlights would be an example) the black pin strips follow and stay within the light image anywhere they go on the screen. The pin stripes do not show up in any darker colors or images. The problem is the same with all sources tested (ie both components, s-video and composite inputs).