On 2/7/10 2:51 AM, Dennis Myhand wrote:
Back in the old days of CRT monitors, which were much like television
sets, I turned a monitor on one day, and it was all green and blue and
flattened and looked very much like this, even though all colors seem to
be here. They are not balanced as the should be. This looks like a
problem in the circuit which controls the color balance for the screen.
in some parts of the screen the color is gone, such as on the dialog
window you have displayed. No red, green or yellow in the upper left and
no pretty blue on "display" or the slider bar. I don't understand why
you think this is not a screen problem. The screen shot will show what
the screen is displaying, no matter the machine. I think you have a big
problem with whatever circuit controls the display output. Just my
opinion, and way too early for real thinking. Peace, Dennis in Victoria
A screen shot will show what the graphics processor is producing, not
what the screen is showing. You can take a screen shot with NO screen
attached. If the screen is distorting colors and such it will have no
effect on a screen shot.
That a screen shot reflects the same distortion as the screen indicates
it's a malfunction in the graphics processor / memory.
Jonas Ulrich wrote:
Hi all, someone gave me this iMac the other day, and it has the
dreaded graphics issue: Anything of a light color on the screen is
distorted and has small lines and distorted pixels. (see picture) I've
determined this is not a screen problem because I took a screen shot
and opened it on another machine and saw the problem still. Here is
what I've tried:
Zapped pram
Reset nvram
Reset SMU
Reinstalled the OS
Cleaned inside and re seated all the cables.
Checked capacitors, there is NO swelling or leaking
Is there something I can try to fix the graphics chip? What exactly is
the problem? Thanks in advanced!
P.S It is the 2nd generation imac 20" with a 2.0GHZ G5 Processor.
-Jonas
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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