Graphics Card Failure! can no longer use my Mac
Today while view images in iPhoto (latest version)
My screen suddenly flickered red and the the lower 3 quarters of the screen (apple cinema display 24) went all scrambled.
I shut down.
I checked the display by attaching it to my mac mini and no problems, works perfectly.
I reattached the display to my Mac Pro again.
I booted in safe mode and the screen was barely discernible and totally psychedelic (reds and magenta's) but I could navigate around.
decided to reboot and zap the PRAM (x3).
let the machine continue after 3rd PRAM zap and the screen was totally unreadable.
rebooted in safe mode and screen was worse.
tried to reboot with the snow leopard dvd using "option" this screen came up fine.
chose the 10.6 install disc and the grey apple screen with the little time elapse wheel came up as the disc was being read, about 5 mins into the dvd read the screen froze.
decided to start machine in target disc mode "T key" and attached the Mac Pro to my mini via firewire. all of the mac pro's internal discs mounted, I check all discs with disk utility and they all passed
repaired blessed drive and it passed with no problems.
decided to reinstall snow leopard from mini onto mac pro blessed drive.
tried booting up mini from mac pro blessed dive and no problem starting up mini.
tried rebooting mac pro to see if this new reinstall would work and it locked up during startup.
tried to reboot with my original system install discs that came with my mac pro by using the "option" at start to choose startup disc and system locked up after about 5 mins.
also tried reboot mac pro in safe mode again and the screen is now black after several minutes.
I can't remember the exact model of nVidia car I have, I believe it's the 8800 GT (need to look at my receipt ) I bought in in January when this model came out.
anyone else have a video card die like this?
I plan to drag in my unit to a Genius Bar and see if they can test or swap out the card.
what a hassle.
See my thread here: http://discussions.apple.com/thread.jspa?threadID=2335070&tstart=0
Apparently, the graphics card is dead.
I also booted into Win XP. While the XP interface did not crash (I have the Win 2000 skin active, which obviously doesn't have any 3D stuff), as soon as I launched a game (GTA IV), the system crashed.
I'll get a Radeon HD 4870 now. I just hope, nothing else is broken...
Good luck!
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Yesterday my screen (30" Apple Cinema) started showing symptoms of graphics card failure, jagged lines across the screen. I rebooted my Mac Pro and it was gone. Then it happened again an hour later, this time the machine didn't boot, I get the Apple logo, and then it hangs up and the screen is shifted to left (I get apple logo on left side of the monitor instead of the middle) and jagged lines all over.
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