NEC MultiSync MT830 Multimedia Projector "vertical lines focus" Questions

...vertical line help we have a projector in focus lp340,and the picture is in black white with 2 black lines thanks there may be the problem with the Tunnel. it will be in the Optical Unit. That needs ...

...vertical white lines appearing over the screen. This may seem like a simple solution, and I don't know if this will work for you, but the way I solved the problem was simply to press the bottom side ...

...focus in the center of the screen, the RGB signals seem to diverge towards the edges of the image. From far away, this makes the image seem blurry but within one foot of the screen it becomes evident ...