There has been a gray shadom on left side of screen, maybe 3 inches wide, for the entire length of the screen. I can see through the shadow, but it is noticeable.... any thoughts?

Return it. It is defective

Line fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

try cleaning the rollers

The grey bars signal that the source image is originally in 4:3 format - if you are using a box of some kind get in its menu and change the format from there to 16:9. The black bars appear when a 16:9 image is sent to a 4:3 format in Letterbox mode - leave it like that or the Pan and Scan mode will chop the sides.

wish the news was better for you, the convergence chip or the color engine has faulted and burned the screen This will be an expensive repair unless it has extended warranty

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Hello: The problem is that a small mirror on the light tunnel has fell off causing a shadow in the picture,. In the past the only way to repair this problem was to replace the entire Optics Engine. But Samsung decided it was replacing entirely to many light engines so they decided to allow and train technicians on how to do it. It involves removing the color wheel and behind it is the light tunnel where light from the lamp shines on to a maybe 1 1/4 inch small block with three mirrors on all sides, your problem is that one of these mirrors has come loose from its side, causing a shadow with the pic still in the background. So if you call a technician to come, if he has'nt had the training from samsung on how to do the procedure then he will want to replace the entire optics engine which is the expensive way of doing it.
So when calling as if they know how to replace light tunnel. There are some adjustments that also needs to be done once it's replaced. To verify what i am saying go to this site to find out more. http://www.avsforum.com/avs-vb/showthread.php?t=758625

Call if you need more info will be glad to help..
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Phone: 702-418-1389

This can be the sync wheel assy, failure in the drive circuit for the display chip, or an illumination fault. You will have to give the set out for service.

Jerry G.

is there a magnet in close proximity to your tv, perhaps an unshielded speaker?

check the connector of DMD module. Service all projector and reinstall.
Viren

I have the same problem and was told by a technician that I need to replace the light engine. Probably around $ 700.00.