Question about NEC (50019497) Projector Lamp for VT440, VT54

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NEC Projector VT440

Used every day in our school. Recently had new bulb and has had polariser replaced in the past. Image is fading, adjustments to colour, etc. makes no difference. Video is Ok-ish but image from computer is terrible, very faint and white background is blue-ish. Any ideas that won't cost a lot?! We have to decide now between spending more money (we've had this one about four years) or buying a new one.

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  • colerhe Jan 10, 2008

    My projector sounds like it's working but no image comes out. If I shine a light down the front barrel I can see the image of my computer monitor so I think it is just the bulb. The problem is I can only find whole lamp mechanisms for sale $510. Does any one know how to just replace a bulb and where do I get them?



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I am a computer and electronics tech for a school district. I have worked on a number of different model projectors. The biggest problem that I see that can wear out a bulb VERY FAST is dust in the filters. When the filters get clogged with dust, the projector cannot move the proper amount of air to keep the lamp cool. These lamps run extremely hot and if not cooled properly can fail very fast. The first sign of a failing bulb is that the picture gets very dim. This is a good sign that the bulb needs to be replaced.

Another thing that can reduce the life of the bulb is leaving the projector on when it is not in use. If you are not using the projector for an extended period, shut it off. Leaving the projector in an A/V muted state does not shut down the bulb completely and can still wear on the lamp hours. These bulbs are rated for a certain number of lamp hours, so any time the projector is on, it is wearing away the hours of useable time. And at the cost of these bulbs, this can get expensive.

Most companies that sell bulbs sell the entire bulb assembly which is the bulb in an easily removeable housing that is usually made of a heat resistant plastic. One place that I use for replacement lamps is a site called my projector lamps This site will sell you the entire bulb assembly for a reasonable price. If you feel confident enough and have a bit of mechanical ability, you can usually get the bulb alone at a cheaper price and replace the one in your existing housing. Bulbs for some of these can be a bit tricky to replace in the plastic housing, so check out your assembly before going and ordering just the bulb. You may want to even try getting the bulb out of the housing first to make sure you can do it. That way if you damage the housing in any way you can then order the complete assembly.

Posted on Apr 14, 2008

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Hello first thing try changing the cables if the the image coming from computer is rubbish then the video card is probeply bad try replacing it with some other one an every day use can easily exhausted every proudact there is out thereif all these wont help I believe it will be best if you will buy a new one then fixing it... good luck have a good 1

Posted on Apr 30, 2006


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SOURCE: NEC vt440 projector is overheating

Try cleaning the filters, there is one on the front and one on the side. When dust builds up on these it can restrict the cooling of the projector

Posted on Nov 22, 2008

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SOURCE: NEC VT 470 projector won't work at all

Try pressing the HELP button. Don't release and press the power button. The LED lights should blink. Release then try to power on again.

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SOURCE: I have a nec 1050.

It sounds like a polariser lens has failed, if so it may be cheaper to purchase a new projector than have it repaired.

Hope I was of assistance to you

Posted on Aug 05, 2011

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