Question about Panasonic PTL500U Multimedia Projector

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Blue dot and shadowing problem with panasonic PTL500U

My panny PTL500U is 2 1/2 years old. Recently I noticed a shadowing problem after I changed channels or paused a movie. Also, a spattering of tiny blue dot clusters has begun to appear on my screen. The number of dots keeps growing. What is going on? and how can I fix it?

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  • Beano2 Dec 27, 2008

    Similar problem - my PT-L500 is 4 years old and has developed a blue shadow in parts of the image. Recently a few blue dots have also appeared. Panasonic tech support not helpful. Bulb replacement has enhanced the problem. Suspect cleaning is required. Any suggestions?



6 Suggested Answers

  • 2 Answers

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Hi there,
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Posted on Jan 02, 2017

  • 1689 Answers

SOURCE: panasonic pt52lcx65 problem are two blue dot

flavrlen, looks like a part of your TV needs re-attaching or replacement, depending on where the blue spot is there is a greater possibility that the EEPROM (IC) has been dettached, you may get this repaired or better off, replaced with a 128K, its just 8 bucks so no problem on that part. getting it in is the tricky part that will require professional physical repair.

if you want to you may contact panasonic to doublecheck,

here's a price list of the parts of your TV.

Posted on Jul 09, 2008


SOURCE: Green and Blue spots on screen

Sounds like stuck pixels, you really can't fix that. Do some google research if you are curious what a stuck pixel is.

Posted on Aug 06, 2008

  • 647 Answers

SOURCE: Three inch red dot appears on my Panasonic tv

Colored Blotches on an LCD Projection TV are usually caused by defects or marks on filters or lenses in the light engine (or optical block) First confirm that the lamp or main lens is not discolored by removing the lamp (unplug set and let cool before removing!) and inspecting the lamp itself and the lens that it shine onto. The light engine is an expensive part ($600-$1200) to replace and requires major disassembly.

Posted on Sep 20, 2009

  • 5138 Answers

SOURCE: i just replaced my lamp on my panasonic rear

Bad Light Engine cost anywhere from $450.00 and up Call these 2 companys for Price Encompass Parts 1-800-638-3328 or UED 1-800-648-6657

Posted on Dec 25, 2009

  • 490 Answers

SOURCE: Just bought my 65" panasonic. The picture has too

Whoa. You are so right. It is actually hundreds of thousands of tiny dots. You are not supposed to notice that, though unless you are sitting waaay too close to the screen or you have the worst cable connection ever. If you have checked all the connections and are sitting far enough away and it is still all dotty, then take that ****** right back and get a different one, no kidding.
I'm there with you,
Farmerbear at

Posted on Sep 15, 2010

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