Re: Another sick computer monitor

["Bernard G. Cleyet & Nancy Ann Seese" <georgeann@REDSHIFT.COM>]

This is strange. However, I think JH may have the answer.  If only blue were black, it'd obviously be that the blue gun's heater had "burned out", or it's amp, connections, etc. had "broken."  But to
get white at any time means you've got the blue "working."  So you may have a short in the cable.  Though I can't immediately see how a combination of shorts and opens will give your result.  When it
was flipping (yesterday), were you moving anything?  I fear that it's not simple, and is in the RGB control circuits.  Forget about degaussing - bring a magnet near the screen and you'll see that a
magnetized mask produces a completely diff. effect.

bc


Doug Craigen wrote:

> Ok, here's my own problem that developed in the last couple of days:
>
> I have an SVGA on one computer that suddenly flipped to very poor
> color.  It went back and forth a few times for a day, but stayed in the
> poor color state for all of yesterday.  So this morning I started
> characterizing the problem a bit.
>
> Using RGB settings in any program: blue appears black, green appears
> bluegreen, and red appears red.  (Plus the natural combinations... such
> as "yellow" appears pure white.)  So blue hits no phosphor and green
> hits both blue and green.  This occurs in both Windows and Linux, and
> when I swap monitors between computers it is a characteristic of the
> monitor not the computer.
>
> Any ideas?  Does this just need degaussing or is it likely to be an
> electronic problem?
>
> \_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/
>
> Doug Craigen
>           http://www.dctech.com/physics/