Question about NEC VT45LPK Projector Lamp for VT45

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VT45 Projector: Blue pixels throughout screen

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

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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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Posted on Jan 02, 2017

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1 Answer

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I assume this is an LCD. I don't remember the s4 being a DLP projector.

This sounds like the LCD panel used for the blue color has gone out. The image is made up of red, green and blue images layered upon the screen. If the blue panel has gone out then there is nothing filtering out the red light in the image.

It looks like yours has just a secone of the panel dying or comming loose from it's connector.

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http://www.aboutprojectors.com/pdf/hitachi-cp-x445-manual.pdf

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1 Answer

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No shortcutts on this one !

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