6 Replies Latest reply: Dec 15, 2008 1:43 AM by Ge64
pandashideout Level 1 Level 1 (0 points)
I'm not sure what triggered it, but vertical blue stripes will pop up and freeze my screen. It started last night and have happened a couple of times already. I can only 'unfreeze' it by rebooting the Mac.


Does anyone know what the problem is?

MacBook Pro, Mac OS X (10.4.11)
  • S.U. Level 6 Level 6 (8,360 points)
    Welcome to Apple Discussions!

    Does the same thing happen with an external display? If so, you might have the NVIDIA chip problem:


    See if you have this chip, and if so, report it to Apple and see if you can get a free repair.

    Good luck!
  • pandashideout Level 1 Level 1 (0 points)
    Thanks. I haven't had the external display problem yet. I'm wondering if it's because I went on the ABC website and watched videos there that made my display distorted. Because I'm working on an important paper, I don't want my Mac to bum out on me, so I'll check a while later.

    Thanks so much for your help.
  • S.U. Level 6 Level 6 (8,360 points)
    I haven't read anything about the ABC website causing problems. Watching videos may be more processor intensive and the machine may run a bit hotter, which might be enough to trigger a video problem that could have been there all along, but just hadn't manifested itself yet.

    If you also get the blue stripes on an external display, that would indicate a problem with the graphics chip. If the video on the external display is fine, then the blue stripes could be a problem with your internal display rather than the chip.

    If you get the stripes again, it might be a good time to run the extended version of the Apple Hardware Test, which is on Install Disc #1 of the gray discs that originally came with your computer. The AHT will test a lot of stuff, and if you get an error code, it will indicate a specific hardware problem. You can try Googling the error code and maybe find out what it is, but Apple is the keeper of error codes and would have to be the one to give you a definitive answer.

    I can appreciate that you need to work on your paper and won't be able to mess with this right away. If your video goes away entirely, here is an article which might help you get it back again:

    Troubleshooting: My computer displays no video


    This article will walk you through some resets which might help.

    Also, sometimes problems are worse if the computer gets hot. If that seems to be the case, something like a chill mat might help until you have time for some serious troubleshooting. So would quitting any unnecessary applications while you are working on your paper.

    Good luck!
  • pandashideout Level 1 Level 1 (0 points)
    Alright! Thanks so much for your help, really informative.
  • pandashideout Level 1 Level 1 (0 points)
    My mac bummed out. It'll only load up to the blue screen part where it's checking if everything on the computer was running alright.

    Vertical blue lines'll appear and it'll ask me to restart the computer. I didn't get to use the grey CD to check what the problems were. So I guess all I can do now is take it to the store..
  • Ge64 Level 1 Level 1 (35 points)
    In case you still have that paper to do or any other files you need urgently: Try booting into 'Target Disk Mode' by holding T as you boot the PC, then you can use the mac as a firewire drive and connect it to another mac (or PC with some software to read Mac drives) to get your files off.