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NEC VT45: Blue pixels onscreen

Hi, This projector get regular use, 2-3 times weekly and recently started to exhibit a blue haze throughout the screen which eventually developed into seemingly random blue pixels. The blue pixels do not display on the screen when there is no input (the VGA input is all that is used) and the white NEC logo is onscreen. There is also a large area in the lower middle of the screen which when the unit is running without any input displays as a large yellow blotch. This blotch is also visible when there is video signal, and the blotch moves when the screen orientation is changed. I will be testing the svideo on the unit later today to see if the issue is related purely to the VGA. If anyone else has experienced these issues some suggestion to fix or what to repair would be greatly appreciated. Thanks

Posted by Star Key on

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5 Related Answers

Anonymous

SOURCE: VT45 Projector: Blue pixels throughout screen

If the problem is what I describe as a blue haze over the entire image projected, I was told this is a defect in the cable - we have a Dell Video Projector 2300 - and it takes only a dell VGA cable.

So, the problem is in the cable - solution is replace cable.

Posted on Oct 10, 2007

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Anonymous

SOURCE: Flashing red status light on NEC VT45 projector

Press and hold down the help button on the remote pointing it towards the projector for at least 10 secs.

Posted on Mar 03, 2008

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Daniel Marks

  • 2 Answers

SOURCE: random dots and no picture

Okay, I had the same problem exactly.

You can't fix it yourself. I took it to the NEC lab and they changed a card. luckily it was covered by the warranty.

[email protected]

Posted on Apr 30, 2008

SOURCE: I am using a NEC

its a common problem of the video hardware in the laptop - it hasnt the ability to split the video "overlay" (often its decoded by something in the video chip, or at least a seperate bit of software and output seperate from the usual, slower windows & images data stream) off to the second screen & you just see the frame of the player.
if you set the external output to be the main/primary, or sometimes only active screen, it should work. you might also have a chance if you make it an extended desktop rather than a cloned one, then moving the player window entirely onto the projector's "screen"

Posted on Jul 02, 2008

projdoc

jasbo

  • 2239 Answers

SOURCE: blue haze in top right of screen from NEC mt1075 projector

the light filter on the blue lcd panel is fried due to excessive dust and heat. clean out the projector with canned air. unfortunately, you cannot buy individual parts of the optical engine- you'll have to replace the whole thing. or live with it.

Posted on Nov 17, 2009

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VT45 Projector: Blue pixels throughout screen

If the problem is what I describe as a blue haze over the entire image projected, I was told this is a defect in the cable - we have a Dell Video Projector 2300 - and it takes only a dell VGA cable.

So, the problem is in the cable - solution is replace cable.

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Flashing red status light on NEC VT45 projector

make sure the doors are shut all the way! there is a little button there.
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