Panasonic PT-L785U Multimedia Projector Logo

Related Topics:

Posted on Oct 09, 2010
Answered by a Fixya Expert

Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

Hello I have a Panasonic PT-L785U LCD Projector, it has a blue color patch top and bottom, is there any type of adjustment to get it out? It;s there when it turns on or when have a video playing, the blub is new. It seems to have something to do with the color???

  • 1 more comment 
  • glj6 Oct 09, 2010

    Hello, I don't know if there was a problem before the bulb, When I got it there was no bulb...so basically I know nothing about this projector. I was wondering if there would be an adjustment with the settings in the menu.? What would I need to do for the board setting exactly. Thanks

  • glj6 Oct 10, 2010

    Hello Steve, I took out the lense, everything is clean, while I had the lense out I turned on the projector and looked at the inner square prism and I could see the blue top and bottom, I tried page 40 and did the adjustments it had no effect on the blue. I took a picture of the screen so you could see it, it almost looks dotted... Thanks Gary

  • glj6 Oct 11, 2010

    I took out the lense, everything is clean, while I had the lense out I turned on the projector and looked at the inner square prism and I could see the blue top and bottom, I tried page 40 and did the adjustments it had no effect on the blue. I took a picture of the screen so you could see it, it almost looks dotted..

×

3 Answers

Anonymous

Level 3:

An expert who has achieved level 3 by getting 1000 points

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Genius:

An expert who has answered 1,000 questions.

  • Master 1,098 Answers
  • Posted on Oct 11, 2010
Anonymous
Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Genius:

An expert who has answered 1,000 questions.

Joined: May 07, 2010
Answers
1098
Questions
2
Helped
177667
Points
3238

Hi, I don't know why Panasonic projectors seem to have this.. It could be heat related or a burn in. It is caused by a long time use maybe more than 3-4 hours of contineous use.

Please call Panasonic to help you solve this issue; here's the link : CLICK HERE

steve morris

Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

  • Master 1,675 Answers
  • Posted on Oct 10, 2010
steve morris
Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Joined: Jan 30, 2010
Answers
1675
Questions
0
Helped
653519
Points
5484

Hi this could be lots of things, a dirty lens, a dirty lamp, or may be its the colour temperature settings, the colour temp as it is known will give a blueish or reddish colour to the white areas, maybe this is the problem, f you have a manual just check page 40, to 41 in the user manual you will find the settings there to adjust the colour temp, obviously do the normal things to, like clean the rear of the lens and the front, make sure you have not accidentally touched the lamp, just rub them over with a dry soft cloth the eliminate any finger marks that could have accidentally been put on them, if you still have problems get back to me and i will see if there is anything else that could be at fault....hope this helps

  • steve morris
    steve morris Oct 10, 2010

    I am glad you mentioned the prism in fact thanks for the photo this has cleared it up for me, i thought the whole picture had a blue tint, but now i can see this is not the case, this is definitely the prism, either it has become miss aligned at some point and someone has tried to put it back but not very well, or, the prism could have broken altogether i do not want to insult you by explaining the workings of the prism as i gather you know what it does, does the prism have back lights? these could be out of line? unfortunately this will not be an easy fix, as you have to remove allot of stuff to get at the prism to remove it, but to be honest it will cost more to replace the prism than it would do to get a second hand projector...

×

Ad

Donald DCruz

Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

  • Panasonic Master 17,130 Answers
  • Posted on Oct 09, 2010
Donald DCruz
Panasonic Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Joined: Jun 24, 2010
Answers
17130
Questions
0
Helped
3634916
Points
52372

If the colors seems to be permanent in the picture the possibility off the LCD imager being faulty is high.
So as the color patch is from the start up , it seems to be a failure or burn up on the LCD.
Need to confirm if this happened when the lamp was changed or was it there before the lamp was replaced.
You can remove and care fully check the display and board settings, fix back all connectors on the main board. If there was an absence of colour we could have assumed the processor board but the patch seems most likely with the LCD.
Be very careful and attempt only with proper tools in dust free enviourment. removing and connecting cords and wires must be done with care.

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

12helpful
1answer

Panasonic projector PT-L78 lamp reset

Press the MENU button. Use the < > arrows to get to the OPTION menu. Press the ENTER button. Select LAMP RUN TIME. Press and hold the ENTER button for about 3 seconds. The 'lamp time reset' will display. Press OK and press the ENTER button. This will reset the lamp hours as well as turn off the projector.
0helpful
1answer

I have a Panasonic LCD projector ( PT-AE700U) - I have had it for 4 years. Recently, I noticed it was projecting "blue" pixels on the bottom right hand side (small size maybe 3 x 8 inches) . Over the past...

your color calibration may be off. see if you can set the red green and blue settings all to "0" and see if that works. may want to refer to your manual and see how you can do that and also see if there is a auto calibration
2helpful
1answer

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.
4helpful
4answers

The projector lamp does not turn on

I have done this on several of our PT-LB50U's with sucess every time.Remove lamp cover and lamp.Then remove top of case by removing 6 screws on bottom.Remove metal shroud that would cover lamp 2 screws and remove 2 screws that hold lamp plug and move it away.You will see a little blue lever for saftey switch move it back and forth from top and bottom put back together and should turn on.
0helpful
1answer

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.
6helpful
4answers

Panasonic projector pt-lm2e

I have Panasonic Pt-LM2E projector and it have a pblm,when it goes standby mode after some time (5-7minutes).no other indications shown (eg: lamp,temperature ).pls give a solution for this

Regards
Siva
0helpful
1answer

Panasonic PT-AE900U displays black and white only

sounds like bad cables, or wrong setting on projector you may have it set to compoent instead of composite,, you don't tell how you are hooking it up. (what type of cables you are using)
Not finding what you are looking for?

504 views

Ask a Question

Usually answered in minutes!

Top Panasonic Office Equipment & Supplies Experts

Norman Weimar
Norman Weimar

Level 3 Expert

7035 Answers

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

Cindy Wells

Level 3 Expert

6688 Answers

Are you a Panasonic Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...