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New information revealed.
1.) I let Apple Service replace my 7600GT with a new one which had a new revision.
Same errors as before, but sometimes crashes while booting.
2.) Now I went back to the Apple Service Center and told them my story. They ordered a new logic board AND a new 7600GT and installed them. I verified that by checking the serial number of the logic board. It is a new one. BUT errors are getting worse. Now the horizontal lines and the crashes even come at random. I just had one while running NO programs at all an just pointed the mouse cursor over the dock.
3.) It has nothing to do with my system. I booted from a Drive Genius CD to check my harddrive. Guess what? Same crash while using Drive Genius. Then I tried to boot via FireWire from an external OSX system. -> Crash while booting.
Tried booting Bootcamp Vista to see what happens there -> Blue Screen of death OR sometimes just a black Screen. But no system response any longer.
4.) I used TechTool Pro 5 to check my Hardware. No errors found. Apple Support Guy told me his Hardware Test Tools showed no errors, too.
Most of the crashes are random. Multiwinia seems to be one application which crashes my iMac for sure.
I do not know what to do next. There is nothing more to replace, it just seems to be a production issue in every card.
Any chance to get a replacement to a newer imac revision? I would even pay a premium to get an ATI card or a newer NVIDIA card.
Apple changed my logical board, all my Ram, an they replaced my Nvidia 7300 GT card for another one. It didn't resolved the problem. The only way to use my MacPro is by reverting back to Mac Osx 10.5.6. Now it's working fine. So I have setup my HD to run either 10.5.7 or 10.5.6.
Mac Pro crash all the time with my 3D Application under 10.5.7 but NEVER under 10.5.6
The problem IS IN THE VIDEO CARD UPDATE that is in Mac Osx 10.5.7
Message was edited by: jfmori
I never said there weren't problems in Leopard, I said that there were problems with both meaning it wasn't a Leopard isolated issue. It happens with both Ati and Nvidia cards in Leopard and Tiger. If you are posting on this board about a Leopard "timeout channel error" or whatever, you are posting on the wrong topic.
Otherwise, please post on GetSatisfaction thread which we have posted over and over again. There are only 7 posts there now, that means that no one who has posted here in the past week has followed-up there. why not?
Zachnap, you're absolutely right reason. I have post in GetSatisfaction too. However I think I will put mi Imac for sale (pieces). This computer is to wate time and money. It has a maximum continuous power of 220W and It´s a **** because didn't even work and electrical invoice up. It´s the last Apple Computer I buy forever and ever.
I suggest people to talk to the different apple podcast, this way we can get the word out and get some feedback from the audience;
Mac Geek gab
I have already left a voicemail to the guys at the Mac Geek Gab, if more of us do the same we can create some fuzz!
Here is how to contact the guys at Mac Geek Gab:
Contact The Mac Geek Gab: Email John and Dave firstname.lastname@example.org (even an audio comment, if you please!), Skype your message to "macgeekgab", or call and leave a voice-mail at 206-666-GEEK!
Paul Quinn1 wrote:
Has anyone actually determined that it is the video card that is compromised by excess heat. Has replacing the card, increasing ventilation holes and fan speed actually solved the problem for anyone?
Yes, I ordered and installed a "new" nvidia 7600GE card in my 24" late 2006 iMac and drilled about 15 or so vent holes to improve cooling. For a few days everything was solved, I was able to watch videos in itunes, hulu.com, DVD player etc. all simultaneously while streaming google earth and had zero problems. Previously (and now again, read below) I can't even watch a video in full screen via Hulu without my whole system freezing.
Unfortunately the "new" card I was sent was not actually new, it was a used part. It was not connecting properly with the motherboard and after a few days stopped working all together. A replacement is on the way (so they tell me) so I'll be trying it all again.
I have contacted another podcaster, Adam Christianson, from the MacCast podcast, he was kind enough to reply to my email, and he said that he will mention this problem on his show, on his own words:
"I am going to mention this on
the show, so maybe raised awareness will get Apple to react."
So I invite everyone to drop a line to Adam, this way he will know that is not just an isolated case, please write to
his website is
if you want to subscribe to his podcast.
Problems are getting worse. As of today, my iMac does not finish booting anymore.
I had a crash with horizontal lines and a spinning beachball while no program was running. I just hovered the mouse over the dock and boom, it crashed.
Now my iMac does not finish booting. Not from the HD, not from an external backup, not even from the original leopard install DVD. I shows the grey apple on a white background, wheel beyond is spinning for about 30 seconds and then it crashes.
If I boot with "ALT" pressed to get the boot menu, it shows the icons WITH HORIZONTAL LINES in the background. I'll bring it in for repair the third time tomorrow.
Apple recognises the problems met with the 7300 GT in the Mac Pro but not with ours models. why?