System not producing full range of blue in pixels

Asus P5W DH Deluxe
Intel Core 2 Duo 6600
G-Skill DDR2-800
Sapphire Radeon X1950 Pro 256 MB
Windows XP Pro SP2


I noticed this problem a few weeks ago when I realized that dark areas
of some images were looking greenish. So I performed a test.

When my computer displays a test image with all possible values
(0-255) of pure red, blue, and green, the blue gradient is black for
values less than 128. The rest of the test image is fine. The same
image file looks normal on other computers.

The monitor and cable were tested on another system and are working
properly. Overclocking and ATI Overdrive are not enabled. The graphics
card runs about 60F.

Has anyone seen something like this? Any ideas on further
troubleshooting?

--
Jason Melancon

"Jason Melancon" <jason.melancon@verizon.net> wrote in message
news:2alq23pei7hp6ao2gbfvuhdfsbsfjpscm1@4ax.com...
> Asus P5W DH Deluxe
> Intel Core 2 Duo 6600
> G-Skill DDR2-800
> Sapphire Radeon X1950 Pro 256 MB
> Windows XP Pro SP2
>
>
> I noticed this problem a few weeks ago when I realized that dark areas
> of some images were looking greenish. So I performed a test.
>
> When my computer displays a test image with all possible values
> (0-255) of pure red, blue, and green, the blue gradient is black for
> values less than 128. The rest of the test image is fine. The same
> image file looks normal on other computers.
>
> The monitor and cable were tested on another system and are working
> properly. Overclocking and ATI Overdrive are not enabled. The graphics
> card runs about 60F.
>
> Has anyone seen something like this? Any ideas on further
> troubleshooting?
>
> --
> Jason Melancon

What driver? Try updating, if old, or using an older version if running
latest. May well be a hardware fault, is it still under warranty? If more
than a year old, check with manufacturer, some give 2 or 3 year warranty.

Mike.

On Tue, 24 Apr 2007 19:30:07 +0100, "Michael Hawes"
<michael.hawes1remove@tiscali.co.uk> (replies to <>) wrote:

> "Jason Melancon" <jason.melancon@verizon.net> wrote in message
> news:2alq23pei7hp6ao2gbfvuhdfsbsfjpscm1@4ax.com...
> >
> > When my computer displays a test image with all possible values
> > (0-255) of pure red, blue, and green, the blue gradient is black for
> > values less than 128. The rest of the test image is fine. The same
> > image file looks normal on other computers.
>
> What driver? Try updating, if old, or using an older version if running
> latest. May well be a hardware fault, is it still under warranty? If more
> than a year old, check with manufacturer, some give 2 or 3 year warranty.

Thanks! I updated my driver, and the problem disappeared! I am such a
newbie. I didn't even consider that it could be a driver issue.

--
Jason Melancon