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Yellow halo fills most of projected image.

Panasonic PT-L785U projector. Yellow halo fills most of projected image. Whites are yellow in color. Cleaned focus lense but no help. R&R projector lamp did not fix it either.

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Posted on Jan 02, 2017

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SOURCE: PT-L785U Projector

if the lamp warning light is flashing, this indicates a defective ballast (lamp power module). if the lamp warning light is lit steadily, then the lamp would be at fault.

Posted on Oct 31, 2008

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Panasonic PT-AE2000U yellow spot


I believe your referring to a lens flare...if so, you must smoothly sand the lens with the finest sand paper and then buff it to perfection

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Somthing is on one of the Mirrors It projects a yellow circle over the image. I have taken the projector apart. I am trying to Remove the board but can't figure out how to diconect the three ribbon cables...


Look at the surface mounted connectors for the LCD panel ribbon cables.
You will notice that the leading edge of the connector closest to the ribbon cable where it enters is a different colour.
Generally its a light brown colour. you gently slide this brown piece towards the ribbon cable about 1mm forward until it stops. then the ribbon cable can be withdrawn away from the connector.
the green lcd ribbon cable is sometime inserted underside. the others above the brown piece.
Note which cables are above and which below when putting them back.

Mar 10, 2011 | Panasonic PT-L785U Multimedia Projector

1 Answer

My panasonic hdtv seems to have developed a yellowish tint to the screen


Sounds like the polarizing film is burnt on one of the three colored lenses that are located next to the projector itself. In order to fix this this it is necessary to remove the ballast and projector units, then disassemble the projector housing to expose the lenses. there are green, blue and vermillion (reddish) lenses. the vermillion lense is the one that causes the yellow tint after it has been damaged.
searching for the pt-43lc14-k service manual (the 'k' version is the more complete one) will provide you with daigrams and such.
I am currently undergoing this repair myself, thus far we have disassembled the television and are waiting on new vermillion polarizing film in order to complete the reapir. Good Luck, it isn't too difficult. Just take lots of digital camera pics (for screw location and sizing) and you should be fine.

May 31, 2010 | Panasonic PT-43LC14 43" Rear Projection...

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Color Wheel


I'm pretty sure if the color wheel spins with no vibration that it's not the colorwheel. I would have to say that your cable is bad. If it has been bent repeatedly near the connection that the wires could be breaking down. Try a brand new cable.

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I replaced the lamp on a Panasonic PT-LC80U thinking this will solve the yellow appereance, but it did work, it seems that there are not blues in the image. What Can I Do to solve the problem?


here are some probable causes..
This appears to be an older model (over 5 years old) and LCD projectors turn yellow with age. It's just what they do
However, if you are projecting a computer signal or a component signal, a short in the blue signal of the cable can cast yellow hues over your image. The hue will cover the entire image as if you are viewing the image "through rose (or in this case, lemon) colored glasses" so to speak. That's an easy fix.

Harder fixes: the blue LCD panel is weaking and/or gone bad.

If you have a round yellowish spot in the middle of your screen, the diffuser has been overheated and is "burnt".

Apr 08, 2010 | Panasonic PT-LC80U Multimedia Projector

2 Answers

My panasonic dlp model pt43lc14 shows yellow picture


there are many mirrors, filters and lenses in the projection assembly, This happened to me too. I took the assembly apart and there was one of the filters that had gotten charred. I peeled off the plastic filter and cleaned the glass it was attached to then put the TV back together, now have a perfect picture again.

Dec 19, 2009 | Panasonic PT-43LC14 43" Rear Projection...

1 Answer

Image on screen is upside down


The orientation of your projector can be setup from the "Option" menu. You may need to select the "FRONT" and "CEILING" options to display the correct orientation of the image.

Jan 19, 2009 | Panasonic PT-L785U Multimedia Projector

1 Answer

PT-L785U Projector


if the lamp warning light is flashing, this indicates a defective ballast (lamp power module). if the lamp warning light is lit steadily, then the lamp would be at fault.

Oct 13, 2008 | Panasonic PT-L785U Multimedia Projector

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