Question about IBM C400 Multimedia Projector

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IBM C400 Projector

Initially my projector was switching on but with the image of a white background and with some black pixels. now after replacing the power board, the power is not switching on and for the old board also it is not switching on, what may be wrong

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SOURCE: why won't my ibm thinkvision c400 wireless

Try to check first the physical connection maybe its not plugged in properly. Use a different power cord.

Posted on Oct 22, 2009

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Suddenly, benq mx511 has white pixels showing up....multiplying every the projected image consists of 50% snow.

It probably has the same DLP chip as my Mitsubishi television. The mirrors in the chip set get stuck and create the white spots. There is no way to fix this other than replacing the DLP chip.

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I have nec np200 and there's a lot of dots appeared on the screen. what seems to be a problem

I have 2 NP-200 projectors installed in a school which show white dots on a black background and black dots on a white background. This is caused by the DMD chip losing pixels. Only solution is to replace the chip, I'm researching now if that i an economical solution.

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How do I repair stuck pixels on a DLP projector

you have certification in this field or u have knowledge about repairing so try other wise do not try go to technician and they repair your projector

Sep 29, 2011 | InFocus IN102 DLP Projector

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How do you clean the dust out of the projector, there are particles that look like small white stars on the black areas and black stars on the white areas. Is this dust?

If you focus the image on a screen up close to the projector and notice small rectangular black and white spots, then you have pixel failures.

Jul 11, 2011 | Optoma TX542 Projector

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My InFocus IN2102EP projector is recently projecting a small white spot. If it was a PC, I'd say that a pixel was out. I've try blowing compressed air in various places, and have removed and replaced the...

Sounds like the DMD chip is on it's way out.
Check if the intermittent problem is related to the external air temperature. Try blowing cold air around the unit with a personal fan to see if it does the same thing.
Check if the air vents and filter is clean

Apr 12, 2011 | InFocus IN2102EP Projector

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Sir, its white small dots on complete screen, like sky with stars,

Place a white piece of paper about 1000mm in front of the screen and focus the image sharply.
Choose menu, image, advanced then select color manager.
go through the color options and check if some pixels are permanently on or off (ie small dots or black) instead of a uniform colour on the screen.

The DLP chip is most likely the faulty component

Mar 01, 2011 | Vivitek D825MX Projector

1 Answer

Why won't my ibm thinkvision c400 wireless projector power on?

Try to check first the physical connection maybe its not plugged in properly. Use a different power cord.

Oct 22, 2009 | IBM ThinkVision C400 Multimedia Projector

1 Answer

Optoma EP716 Projector


Make sure that the resolution shown by the projector matches with that of the computer resolution. Many projectors does it automatically.
But if there exists a problem in resolution matching, there is a chance of getting partial picture. So better check that the resolution shown by the projector matches with that of the computer.

Also, the pixel may be degraded due to,
  • Their susceptibility to heat; the organic compounds used in LCD filters - in particular the blue - can be broken down by excess heat, resulting in a degradation of image quality.

  • "Dead Pixels"; pixels can become permanently on or permanently off, and while this is barely noticeable with one dead pixel, the presence of multiple dead pixels can be a irritation.
The only way to fix the problem is to replace the 3 LCD panels which, if you could get the part would cost you more than a new one.
LCDs are really difficult to make so lots of them do actually get passed with dead pixels on them.

But i suggest you to get some advice from the service center too.....
Hope my info solves your problem.
Thanx for using fixya.

Oct 01, 2008 | Optoma H30 Multimedia Projector

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