What do you mean "shimming the GPU?" On Sun, Feb 7, 2010 at 10:52 AM, Clark Martin <cm...@sonic.net> wrote:
> 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" > > -- > You received this message because you are a member of G-Group, a group for > those using G3, G4, and G5 desktop Macs - with a particular focus on Power > Macs. > The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to g3-5-list@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/g3-5-list > -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
