Question about InFocus ScreenPlay 4805 Multimedia Projector

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We have a screenplay 4805 by infocus. the right third has a dark shadow over the picture? the picture is lightly visible thru the shadow.

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The light tunnel under the colorwheel has collasped or the projector has been jarred, knocking the mirror inside of the lens assy. out of alignment. Either way, it will have to be repaired by a technician.

Posted on Oct 12, 2010

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Its commonly known as Light Tunnel Failure. If you would like more info and may consider repairing yourself, Go to www.avsforum.com and search for "4805 Light Tunnel". You will find threads on opening the PJ as well as the repair of the Tunnel. I also posted a DIY Replacement thread there as well recently.

Posted on Jan 07, 2011

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1 Answer

Left hand side of image appears darker than rest of image as if a shadow is caused from somewhere. Unsure if this is a lamp problem or a camera problem


If it looks like a dark orange/brown band, its likely to be a Light Tunnel Failure. The Tunnel can be fixed thru the manufacturer, but it will cost plenty. You can also do it yourself.
For additional info, go to www.avsforum.com and search for "4805 Light Tunnel" and you will see threads about the problem...as well as DIY repairs.
I also posted a DIY replacement option since new Tunnels are virtually non-existent:
www.avsforum.com/avs-vb/showthread.php?t=1304694

Dec 24, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Starting to get an orange shadow on the right side of picture


If you have not already found out, your problem is Light Tunnel Failure. It is common and can be corrected DIY. Replacement part is nearly non-existent and manufacturer repair is expensive.
For additional info go to www.avsforum.com and search for "4805 Light Tunnel". You will find threads about the problem as well as fixes. I also posted a DIY replacement option as well:
www.avsforum.com/avs-vb/showthread.php?t=1304694

Oct 18, 2010 | InFocus ScreenPlay 4805 Multimedia...

2 Answers

My unit seems to work fine, except there is a dark shadow covering the right third of the projected image. Is this a sign that the bulb is going out?


this is the light tunnel needing to be adjusted or replaced because is has collasped due to the heat given off by the lamp during the life of the projector.

Aug 27, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

A shadow on the right side of the screen from top to bottom


Something inside the unit is out of alignment in the light path

Apr 23, 2010 | InFocus ScreenPlay 4805 Multimedia...

2 Answers

It has a shadow on half the screen


the light tunnel has collapsed. you can get the part from an infocus service center and do it yourself or send it to one for repair. either way, try av solutions in ny. they're really good. www.avsolutionsny.com

Jan 18, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

I have a very dark vertical shadow over half the screen. Rest is fine. Settings fine bulb hours only 609


the light tunnel is collapsing and needs to be replaced. you can get the part from an infocus service center or send it in to them for repair. either way, try av solutions in ny. they're really good. www.avsolutionsny.com

Dec 20, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Dark in middle , clear in upper and middle left corner


your light tunnel has collapsed and needs replacing. you can get the part and do it yourself, or you'll have to send it in to an infocus authorized service center. try av solutions in ny. they're pretty good.

Nov 02, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

I have a InFocus 4805. Half the picture is darker


Your light tunnel may have collapsed. This is made up of 4 tiny rectangular mirrors glued together to make a tunnel.

Sep 26, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Knoll hd-102 projector


Let me start by saying that my projector is an InFocus Screenplay 4805, but that I have had the shadow you're talking about on the left foot or so of my screen for about 18 months now. I've researched it and found out that it has something to do with the glue holding something called a "Light Tube" in place heating up and essentially becoming liquid enough to allow this light tube to shift positions...the further out of position it gets the more of that "eclipse" effect you see on the screen. It sound like yours has shifted far enough that no light can pass through it at all.

Nov 08, 2008 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

4805 shadow


Regluing the light tunnel i'm afraid. Not for the fainthearted.

Dec 18, 2007 | InFocus ScreenPlay 4805 Multimedia...

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