Green or Pink Vertical Lines and Freezing

Did you ever resolve this problem? I am have a similiar progressive issue.

Dan

Also having this issue, and kernel panics along with the checkerboardy lines on start-up. Currently can't use my computer because of this. I ran the hardware test and think there's a problem with the video card, but am not sure. Taking the computer in next week.

Hi,

in my case the lines are blue with black stripes. The blue has a wavy pattern. I have screenshots, but can't post them here.
The kernel panic log makes me think it is the Nvidia 8600M GT issue. It caused me lots of black screens before (but no kernel panic), and now I have this twice in as many days.
Here is what worked: Connected the MBP to an iMac in Target mode, then boot it in Safe Mode, let it run until the kernel panics (takes VERY long in Safe Mode), then reboot. I can tell when it's over because the normally grey apple logo on the startup screen is showing the black/blue pattern when it goes to panic.
Oddly enough, the Apple hardware test at the Apple dealer did not indicate an issue with the Nvidia card (which is clearly ********).
What else did I try (which did not work):
Let the computer cool down for > 2 hours
Reset Parameter RAM
Boot from DVD
Removed Library/Startup Items
... and a lot more
Tomorrow I will see what the Aple dealer will tell me about the Nvidia card THIS time.

Welcome to Apple Discussions!

If you have the NVIDIA GeForce 8600M GT video chip, it could be this problem:

http://support.apple.com/kb/TS2377

If so, Apple will repair it for free, even if you don't have Applecare.

Good luck!

thanks for your speedy reply!
Yes, I agree the Nvidia packing problem is the most likely explanation. Apple issued a test which must show a positive result; only then a repair code is generated, and this code is what makes Apple give the repair shop a new motherboard. Unfortunately, I had my computer checked 3 weeks ago, but in 40 runs no code was issued.
The defect has different consequences now, so I expect this time it will be different. Before, only the screen went black (I had to do a hard reset each time, so all open files were lost), but now the Nvidia driver causes a kernel panic, and much more reliably than before.

The problem can be intermittent, but should get worse, especially when the Mac is hot. Maybe try something graphics intensive like a game before they test it next time.

Good luck!

yes, it was the Nvidia problem. With the kernel panic, even the Apple service people admitted that my MoBo needs to be replaced. Now the Mac is back and working fine, except for all those issues which come from having a new ethernet ID.

Good deal! Glad Apple got it fixed for you. Probably having a working computer again is worth the hassle of the new ethernet ID.

Good luck, and happy computing!