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Screen image= has round outline mark on screen ,bright yellow in middle ,[most of screen] and blue on outer edge of sceen,but projecting clear image ,inside yellow out side blue

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  • chris335432 Apr 10, 2011

    this is a nec projector model number-mt1075

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Sounds like a bad video card or loose connection,check connection and then if that dont work replace video card..

Posted on Apr 10, 2011

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Bright Spot


A fixed blue area on screen may be a display panel (main screen unit)
Here is a link for the boards etc this set uses--take your pick:

http://www.shopjimmy.com/sceptre-x460bv-f120

May 17, 2012 | Sceptre 46 X460BVF120 LCD TV

1 Answer

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

1 Answer

The outer edges of my screen are showing double images ie I get blue and red images


Adjust the cross hairs on your TV. See menu setting for convergence. If this will not cure the problem..you have a bad convergence board!

Jan 07, 2010 | Zenith R57W46 57" Rear Projection...

2 Answers

My Hitachi 60VG825 projection TV is 3 years old. For the past several months the screen has been turning blue around the outer edges & this past week a large yellowish green spot the size of a...


Sounds like Calibration is needed on the projection internals. Your TV uses a rear-projection system and the problem is either in the imaging LCD Unit or the light filter. I see in a previous thread you have changed the bulb. You can invest in a voltage regulator to keep the hardware in factory condition.
Also you can burn a DVD of a stuck pixel remedy video and run it on the screen with full brightness and full contrast. This is used for plasma burns and stuck pixels on conventional Flat panel TVs but can repair color issues with projection systems. This therapy is focused on the imaging unit between the projector and the main drop of your tv.
please feel free to post a more in-depth description or any changes

Nov 06, 2009 | Hitachi 60VG825 60 in. LCD Television

1 Answer

Sony 43 inch rear projection tv, I have lined up the convergence but still seeing red and green around edge of the tv on the images, seems fine in the middle of the screen though.


Always start at the vary center of the screen with Green. Position Red over Green, then Blue over what now will look yellow. If all is perfect except the outside, you will need to adjust "Mid-Size" until the middle is just as far off as the outside lines. Then adjust the main "Size" adustments to match. Go very slow or you can make a mess of it.

Mar 06, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Screen hazzy and issue with blue convergence


bad convergence would cause show to look as if it was supposed to be a 3-d movie, if a bulb was going out then people would look purple blue -green,or some other off color, so likely the green bulb is going out from the color of the people you described.

Feb 06, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

Double image in bright blue with philips model 55pw9363/17f



You may have 1 of two problems.

1) Convergence Chips are failing - Using your original remote goto the "convergence" screen. 

Try to adjust the red - UP - DOWN - LEFT - RIGHT

Next try to adjust the blue - UP - DOWN - LEFT - RIGHT

If you can move both colors in all directions you do not have a convergence issue. 

If you can't move one or more colors in one or more directions the convergence chips are defective and need to be replaced. 

If your convergence chips test out ok the most likely problem is......

2) CRT Coolant is cloudy  - The bright outline you described is one common symptom. Other symptoms include dull images, red or orange tint, halo around images.   

If you goto the site www.TvRepairKits.com - and click on "Tips" - you will find more detailed instructions on how to check the convergence.  

Dec 04, 2008 | Philips 55PW9363 55" Rear Projection...

4 Answers

Nec projector vt 660


could be bad bulb is it setting in right is coler wheel freeley moving

Oct 06, 2008 | NEC VT47 Multimedia Projector

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