Question about Samsung HL-R5678W 56" Television

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Replacing light tunnel (instructions)

I am getting a shadow about 2 in wide running down the left side of my tv. i was told my a samsung tech that i don't need to replace the entire light engine, but just a small, sheaper part called the light tunnel. any service repair centers around me have no idea what i'm talking about. i'm looking for some instructions on how to do it myself.

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  • Lisa Ries Jul 25, 2007


    hey, if you could please forward those directions on to me. I'll take a look at them and see if it's something i can do. if i feel like it's not i won't try it. my email is [email protected] thanks!

  • sam32 Jan 06, 2008

    I am having the same thing. I ignored it for about 8 months because it was only on one side, but now it covers most of the picture. Instructions on how to replace the Light Tunnel would be very helpful. I don't want to pay anything to fix this tv because it is almost 3 years old.

  • Anonymous Mar 15, 2008

    I have this same problem on the same exact tv. Please send me the instructions to replace the light tunnel.

  • Anonymous Mar 20, 2008

    My shadow is 6" to 8" wide on the left side of the screen too. I also have ignored it for 8 months+. I decided to call for repairs. The technician didn't even have to come out first because he knows it is the light tunnel. The part is ordered and they have told me that the total cost will be $450 (parts+labor) to fix it. Cha-ching!!!

  • shatkevich Oct 01, 2008

    I have the same problem, I think. A shadow on the left that was first 3 inches wide and has recently grown to 6. Looking for a cost effective solution. Please help.


    [email protected]

  • smrashad Nov 07, 2008

    I have the same problem. Please send me instructions to fix myself...Thanks
    [email protected] 

  • rlbcb Feb 16, 2009

    I have the same problem with a dark, 2 inch, strip down the left edge of my Samsung 1080 dlp. A tech told me it needed a new mirror light tunnel and would cost between 200 and 300 dollars. How can I locate the part myself?

  • stephenlittl Mar 13, 2009

    please send me the file on how to do this....thanks

  • Anonymous Mar 29, 2009

    please send me the file to fix this myself.... [email protected]

  • skicory Apr 08, 2009

    Could you please send me the file to replace the light tunnel. Thanks

    [email protected]

  • Anonymous Apr 29, 2009

    I have the same problem, please send me the file on how to do this....thanks
    [email protected]



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Hi, if you did not get help until now, i can send you step by step instructions and photos how to do it. I did several of these and it is not a big deal.But you will have to take apart a very sensitive optical device and if you are not confident that you can do it do not start this.bp67-00291a is the part number for the light a message here if you need that file with instructions

Posted on Jul 25, 2007

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  • fhc1121 Nov 25, 2010

    Hello ac4job,

    I have the same problem (2" vertical shadow on the right side). Can you please email me the instructions to replace the light tunnel?

    My email is [email protected]

    Thank you.

  • 3dfilmmaker Dec 20, 2010

    Sumnsung is fixing the light tunnel issue for free, don't pay to get it repaired!

  • losgatosman Aug 30, 2013

    I have a dlp problem can you send the instructions to [email protected]


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Old post i know but may help someone out
I have solved my problem of a dark shadow on the left hand side of my
samsung DLP sp4sl6hv using this video which was near enough the same as my set. When i could see the light tunnel i used a toothpic to push the mirror on the right back in place (it was a fraction of a millimetre btw) and all is well now. I also used this video for removing the whole light chamber as there are some wires to remove before removal, hope this helps in some way, costless fix to

Posted on Nov 13, 2012

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Alin can you post instructions. The video Andy mentions is marked private and I am experiencing the issue too.

Thank you in advance,

Posted on Jul 27, 2015

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  • 150 Answers

Never replaced a Light Tunnel Myself, I have heard of this problem, Toshibas have done this to me as well, it is MUCH easier to replace Light engine and results in better repair, once you start taking a microdisplay engine apart you run the risk of contamination.

Posted on Jul 11, 2007

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1 Answer

3 problems 1. TV shuts off and on automatically. 2. 2 inch band on left side of screen 3. No picture at all

The band or shadow on the left side of the screen definitely sounds like a defective light tunnel.As for the intermittent pix and shut down this could be the lamp if you have not already changed it.

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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.

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

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You have a bad Light Tunnel and needs to be replaced by a trained service tech. I bet you have a Samsung. If it is a Samsung there is a recall and a tech bulliten on this problem. Samsung might pay for the repair. If they resist ask for the ECR group and mention the Light Tunnel issue. This is not a part you cannot replace yourself.

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replace light tunnel = use service manual for procedure....T.

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