Question about Panasonic PT L720U Multimedia Projector

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Dark (brown-yellow) area on the screen

I looks as if there is a big yellowish brown blob in the middle of the picture you can see through it but the picture is tinted that color.

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  • Dale Nelson Jun 17, 2007

    This site blows ass!!

  • Dale Nelson Jul 05, 2007

    Has there ever been a question answered?

    P.S. This site sucks shit!

  • Dale Nelson Jul 20, 2007

    Keep on sucking!!

  • Anonymous Feb 20, 2009

    I have the same problem. I swapped lamps with a good projector and the problem did not go away so it's not the lamp. I think one of the LCD panels is going bad. There are 3 panels and each one costs about $400, if you can get it from Panasonic.



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I have found what causes this problem, there is a red filter before the transparent lcd. Mine was burned and displaying the colors your are describing.

You need to take the cover off and then you will need to take the circuit board off. Where you see the 3 ribbons cables is the area that's causing this problem.

You will see a tiny screw from the top, unscrew it and remove the red filter, it should be on the ribbon cable with a blue dot. You will probably see that this color filter on the glass has been burnt.

So I thought I could order some heat resistant gel swatches used in theater lighting to correct the color. However these heat resistant swatches are not really heat reisistant. I found that the plane red color worked best but after about 30 seconds it started to discolor the filter I placed in.

So now I'm looking at trying to located a service manual for this.

Posted on Apr 06, 2010

  • David Sitzes Aug 15, 2012

    I have the same problem...did you ever find a solution to this?



Did you ever find a solution to your yellowish brown blob? I have the same problem with mine here at work.

Posted on Feb 28, 2008


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