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Author Topic: Two NEC monitors suddenly don't match  (Read 1821 times)

PeterAit

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Two NEC monitors suddenly don't match
« on: November 14, 2013, 08:49:08 AM »

I have the PA301W and the 2690WUXi and use Spectraview for calibration. For 2+ years they have worked perfectly and matched each other exactly in image brightness, color, and contrast. Suddenly they don't quite match - the 2690 is slightly, but noticeably, warmer than the other even right after a calibration. I believe I do the calibration properly - shield from stray light, allow to warm up, etc. What could be the cause of this? Running Windows 7.
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digitaldog

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Re: Two NEC monitors suddenly don't match
« Reply #1 on: November 14, 2013, 09:54:55 AM »

Don't know the cause but the fix is to change the calibration targets to reduce the warmth (higher white point for backlight) until they match.
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howardm

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Re: Two NEC monitors suddenly don't match
« Reply #2 on: November 14, 2013, 10:50:01 AM »

My guess would be that the CCFL backlight has reached a point in age/hours where it's color is starting to shift a bit or maybe phosphor burnout.

PeterAit

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Re: Two NEC monitors suddenly don't match
« Reply #3 on: November 14, 2013, 11:15:08 AM »

My guess would be that the CCFL backlight has reached a point in age/hours where it's color is starting to shift a bit or maybe phosphor burnout.

But isn't the calibration process intended to correct for these age changes?
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howardm

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Re: Two NEC monitors suddenly don't match
« Reply #4 on: November 14, 2013, 11:17:39 AM »

If that was true, then taking 2 different & random panels and calibrating to the same targets would yield the same visual results but that doesn't
happen in the real world
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