Question about NEC MultiSync VT45 Multimedia Projector
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
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.
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
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
the power supply on that model seem to go bad after a while. the caps aren't properly reted it's power needs. they dry up. if you are good at soldering, replace c1 on the board (big cap) with a cap that has a slightly higher voltage rating. or replace the whole power supply. you might not be able to get one from nec, but you can try www.projectordoctor.com
Posted on Dec 16, 2009
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