Mac Pro display flashing like strobe light and freezes

What seemed like out of nowhere my mouse jumped across the screen and the display started flashing like a strobe. Then everything froze. Only way to reboot is by holding the power button for long enough. It boots fine and appears ok but then quickly freezes and/or starts flashing again. I've verified and repaired disks (both from CD and not), ran applejack, and it's still happening.
I also noticed a small black box (only a smal part of the display) with red squiggly lines) appears at the freeze, in a different place each time it locks up.
Anone know what's up?

I just learned that MacBooks with NVIDIA GeForce 8600M GT video cards have been failing at a higher than normal rate due to a packaging defect. Apple has been replacing these processors free of charge on certain computers.
http://support.apple.com/kb/TS2377

Similar Messages

  • I solve my problem of black screen when starting up my Mac pro, namely by the button lighting and then i saw the login screen. Hopefully it works for you too.

    I solve my problem of black screen when starting up my Mac pro, namely by using the lighting button and then i saw the login screen. Hopefully it works for you.

    It was the PRAM.

  • When i try to open dmg file for newest version of itunes, my mac pro does not open to install and freezes my main desktop toolbar so i can't select the apple to shut down, it also enables me to open any other programs?HELP PLEASE

    i've been forced by my comp to shut down several times by holding the power button because of the inability to select the apple and shut down correctly..idk if i got a rare mac virus or bug.. and some programs simply won't open when clicked on.. i don't know how this is possible after years of great performance..

    Where did you get this "dmg file"? To install the newest version of any Apple software, including iTunes, all you have to do is use Software Update from the Apple menu. This doesn't download any dmg, it automatically installs the software for you.
    Maybe try repairing your permissions from Disk Utility (in your Utilities folder).
    Also - What version of OS X do you have? Please update your forum profile so we can help you better.
    Matt

  • Mac Pro display flickers with a white screen and then display closes

    Hi,
    The display on my Mac Pro started showing a white screen and flickering.
    So I tried formating and re-installing 10.4.10. I am able to complete the installation of first DVD without flickering. But when after the restart after installation using first DVD then the flickering resumes.
    Any idea what is the issue and how we can solve this issue.
    The AHT test shows this code 4 SNS/1/40000001:ICAC. According to
    http://support.apple.com/kb/TS2081?viewlocale=en_US the code should have a trailing number - but my report does not have any number. Is this error code fine? If no, can some one tell me what is the error in the system?
    Thanks,
    Ed
    Message was edited by: esg123

    Same symptoms here. We tried AHT on a good Mac Pro with the video card from the bad mac, and got the 4 SNS/1/40000001:ICAC error. Looks like a bad video card.
    Here's another thread discussing the problem: http://discussions.info.apple.com/thread.jspa?threadID=2071334
    Dave

  • User Contributed Tips in the Mac Pro Displays and the Mac Pro forum

    *The following User Contributed Tips are located in the Mac Pro > Displays and the Mac Pro forum:*
    None at this time.
    *The following related tips are located in other areas of Apple Discussions:*
    a brody - Using a second Mac as a display for a first
    http://discussions.apple.com/thread.jspa?threadID=1587927
    Publish date: July 7, 2008
    See also User Tips Library

    You can use the two graphics cards, but it's only useful if you have more than two displays. It won't give you higher speed.

  • I've just acquired a 2007 Mac Pro 2,1 2x 3GHz Xeon and would like to upgrade the graphics card

    I've just acquired a 2007 Mac Pro 2,1 2x 3GHz Xeon and would like to upgrade the graphics card. I'd like to be able to run the Adobe CC 2014 software for 2D animation work. Don't need CUDA for any ray-traced work, just want to be able to run Ai and AE at the same time and have it handle the playback. Will this card http://www.ebay.com/itm/181466634525?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack =true be a good way to go? Or should I stick with the 4500? Or is there any other suggestion or things I should know?
    <Re-Titled By Host>

    Only a tad pricey but half what it use to be and works - Apple ATI 5870
    http://www.amazon.com/Apple-ATI-5870-Standalone-MC743ZM/dp/B003Z6QH6W/
    Check it on www.barefeats.com - back in 2010/2011 for tests
    Or 5770
    http://www.amazon.com/Apple-ATI-Radeon-5770-MC742ZM/dp/B003Z6QH6M/
    http://www.amazon.com/Apple-ATI-Radeon-5770-MC742ZM/dp/B003Z6QH6M/ref=sr_1_1?ie= UTF8&qid=1416257115&sr=8-1&keywords=apple+ati+5770&pebp=1416257120057

  • 27" iMac as Mac Pro Display?

    I currently use the 24" LED as a display for my Mac Pro, but give the increased pixels on the 27" iMac and it's MiniDisplay Port in capability, and given it's cheaper than the 30" cinema display, with a much better panel, on only slightly lower vertical display resolution, I've been giving serious thought to switching to the baseline 27" iMac as a display.
    A couple things are holding me back. I'm guessing with MiniDP in, you only get the video, no audio like on the 24" LED (which uses USB). Since there's no USB, I'm also guessing there's no iSight pass-through. I could always add speakers and and a mic/cam combo, but that seems less elegant.
    Has anyone tried the 27" iMac as a Mac Pro display? If so, please let me know how well it fits.

    Peter Miller wrote:
    ... if there is a "target display mode", ...
    Hello Pete.
    Search your SnowLeopard Mac Finder > Help for "target display mode" (without the quotation marks) to find the instructions for this new feature.
    Among those instructions are:
    The external display computer works like any other external display. To change display settings, open System Preferences on the primary computer and click Display.
    I looked for the web-based page, but I could not find it, so, at least for now, you will need to view it in your Mac's Help viewer.
    EZ Jim
    MacPro QuadCore(Early 2009) 2.93Ghz w/MacOSX (10.6.2)  MacBookPro(13inch,Mid2009) 2.26GHz(10.6.2)
    LED Cinema Display  G4PowerBook1.67GHz(10.4.11)  iBookSE366MHz(10.3.9)  External iSight

  • Mac Pro display remains black after start up.

    My 2008 Mac Pro display remains black after start up.  It is plugged in properly and the light comes on, but the screen stays black.  It first started doing this about a week ago, but after a manual restart or two, it would start up properly with the display working.  Today the display has remained black every time I've tried to start up.  Any suggestions for troubleshooting would be greatly appreciated! Thanks!  

    Safe Mode uses a very simple way of talking to the screen -- it does not even load the screen driver, and it uses a very common low resolution.
    If it does not work that way, it simply does not work. You need a replacement graphics card.
    User Tip: Mac Pro silver tower (2006-2012) Replacement Graphics cards

  • My computer, running on Lion, randomly flashes with crazy lights and colors. Doesn't happen often, but when it does it's totally random. What causes this problem and how can I solve it?

    My MacBook Pro, running on Lion, randomly flashes with crazy lights and colors. Doesn't happen often, but when it does it's totally random. It looks like the Northern LIghts!!!
    What causes this problem and how can I solve it?

    Really? Oh I get it. You're the kind of person who goes on tech message boards to make jokes - or friends.
    Well, I'm trying to solve this problem - which is a rather annoying way to spend a Saturday.
    SO either help or don't reply.

  • Why no controls on My Mac Pro display for the 9/12 event?

    Why no controls on My Mac Pro display for the 9/12 event?  I thought it odd that I had no conrols for the event (later in the day) - Just something Apple was trying different. - It was frustrating that I could not pause it , and later, jump to the point where it crashed. (anybody else have that problem?)  But later I had my wife look at it on her 24" iMac, and the controls were present and it worked fine.  I thought it might be because I had turn off Java; I turned it on and tried it, still no fade in on mouse move controls.  Anybody have an idea why?  (Apple STILL needs to update the product list on this submit page This is ML 10.8)

    After 3 more days, and a reboot, still no controls on THIS video. Everything else seems fine.  Even the Apple movie trailers with the same type of "floating" controls work properly.  Does anybody have a clue?

  • Mac Pro Display Issue

    Mac Pro Display Issue - Unexpectedly Sleeps and Freezes
    Just since a couple of days my Mac Pro desktop has been having display issues. Unexpectedly the screens go into sleep mode, it turns black and freezes, the computer doesnot respond to the keyboard or mouse.
    At first I thought this was related to Chrome, and switched to Firefox, but the computer is still having the same issue. I have to shut down and restart each time it gets stuck.
    I even went into preferences and changed the energy saver settings to "Never" allow display or harddrive to sleep. But this problem is stil happening.
    Does anyone have the same problems? Or a solution?

    I cleaned out my mac with compressed air, it was dusty, but the display flickering happened again.
    So I followed your advice and installed:
    Temperature Monitor
    http://www.bresink.de/osx/TemperatureMonitor.html
    Which showed that my memory module 1B and 2B were 70 - 75'C(160 -167'F). There was no reading for the graphic card so I couldn't tell if that was over heating.
    Then I installed:
    smc fan controller
    http://www.macupdate.com/app/mac/23049/smcfancontrol
    and increased the memory_cpu fan speed which lowered the temperature of the ram to 60'C (143'F).
    I even changed this ram's placement and put it in different slots.This ram was the same temperature in the new placements.
    Also this is the kingston 2gb ram without heatsinks. Ive used it for 1.5 yrs, and this is the first time its giving me these problems.
    Do you know how I can check if the graphic card is over heating? or is the problem just with the ram?
    Thank you for all your help!

  • Can the Mac Pro run Window XP (booth camp) and be used as a MAc OS server

    Hi There
    Can the Mac Pro run Window XP (booth camp) and be used as a MAc OS server in the same time?
    I am a small business and I was thinking of using the new mac pro for a new workstation on my studio and to also use it as a server for 5 work others stations. Is that possible? Or I am asking a bit to much work load to do for the Mac Pro?
    Can the Mac Pro can run under Window XP and Autocad and still be accessed by other workstation whilst working on the cad software? Is booth camp will slow the machine like Virtual PC?
    IS the MAc Pro can manage file hosting website with PHP and mySQL capabilites?
    CHARLES
    MAC PRO Mac OS X (10.4.7)

    Great question, but it appears the answer is no (at this time); they promise to work on it immediately. Check this thread at parallels.
    http://forum.parallels.com/thread3659.html
    iMAC G5 20" - 2GB RAM - 150 GB Hard Drive   Mac OS X (10.4.6)   Also MacMini & MacBook Pro Intel Core Duo - OS X & WIN2K

  • On startup Mac Pro I get a blue screen and a cursor on the upper left. The mouse cursor shows up independently. Is it likely a video card failure?

    On startup Mac Pro I get a blue screen and a cursor on the upper left. The mouse cursor shows up independently. Is it likely a video card failure?

    I managed to boot the computer and get the desktop to show. I now have a "repaired" computer. There are several problems that have cropped up. One is that I can only start up now in Safe Boot mode. Is there a way to turn it off? Also, I do not have a sound list, so I can't access anything requiring audio. Google Chrome only shows up as a white screen. Pictures that loaded before don't load in browsers, etc. Any suggestions? I figure I should reinstall Mac OS Lion for starts, maybe even do a mirror backup and reformat the drive. I think this drive has turned into scrambled eggs...what a headache!

  • I cannot change song order on playlist with highlight and drag. I have turned off shuffle and highlighted the far left column( up/down arrow) of playlist. My mac pro is running 10.5.8  and am using itunes 10.4.

    I cannot change song order on playlists (old or new) with highlight and drag. I have turned off shuffle and highlighted the far left column (up/down arrow) of playlist. My mac pro is running 10.5.8  and am using itunes 10.4. I can't drag and drop "music" to "playlist" but can right click and get the option to "add to playlist." No such option for moving song within playlist, only the up and down arrow which moves song from top to bottom list, so if it is #4 from top it will move to #4 from bottom. Stupid I know. I spent over an hour with Apple support, reinstalled itunes, restarted and rebooted computer. Networked with my laptop which is running 10.6.8 and itunes 10.4 and it can drag and drop. The final Apple support solution was to reinstall my operating system. I would prefer not to. Any other ideas?

    After looking at other people's posts, I think it's official: there is a bug. Itunes support said I should not have lost the drag/drop tool and I haven't on the laptop that is running itunes 10.4 and operating system 10.6.8. I chatted with someboby who lost both his drag/drop and side scroll and what we have in common is a wacom tablet for a mouse. My laptop is a wireless mouse. I reinstalled whatever updated driver that wacom has out there, shut the system down for night, hoping for magic, but alas none to be had. So if I want to change song order, I network the laptop and desktop, share the screen on the laptop, drag and drop to my heart's content and curse Apple for making me work this hard to find the tool that was once at my fingertips. Apple also let me know that if I want to share songs in household that the hundreds on songs that were purchased for .99 need to be repurchased for another .30. Maybe Apple is holding my drag/drop tool captive til I pay up the money or Maybe the next update will fix the problem, I for one give up for now.

  • Using Logic 7.2 on a Mac Pro with Protools 7.2.1 and Mac OS 10.4.7

    I am researching purchasing a New Protools/Logic System
    Seems the version of Protools to use with the new Mac Pros is 7.2.1, which only recently came out to work with the new "Mac Pros" Digidesign has stated thhat it works with and Mac OS 10.4.7
    The latest version of Logic is 7.2 which has been out for a while....hmmm
    Is anybody using Logic 7.2 on a New Mac Pro with Protools 7.2.1 and Mac OS 10.4.7, and does it work?

    Logic Pro 7.2.2 is not compatible with DAE/TDM on a Mac Pro INTEL.
    You will see only "CoreAudio" as available choice, when trying to engage your audio hardware.
    We have to wait for any announcements in this regard, maybe at AES or DigiDays in San Francisco.
    Best,
    21th

Maybe you are looking for

  • Help needed in recovering 2 threaded db

    Here we go, I had this working while ago, I have taken a backup of a db, full backup, all successful, this backup had 2 threads. Now the recovery. I recovered the controlfile, then recoevered the database like below, SET UNTIL SEQUENCE 3543 thread 2;

  • How to change Table Cell Field Type Dynamically?

    Hi All, I am fetching some news data from backend DB and displaying them in a WD Table. Now one News Item may or may not have a URL behind it. If I find the URL as null then I want to display the news as simple TextView otherwise as LinkToUrl. How ca

  • Problems with H2 digital interface

    I have a SoomH2, and a macbook, os 10.5.8. When I plug into the USB, to use as a mike for garage band, the sound going into the computer is all distorted and shows a solid thick wad of sound on the garage band recording level, despite turning down th

  • Time Series Graph Show Inappropriate Data for Continuous Analysis

    Hi All, I have marked Month as the Chronological Key in my BMM Layer but still I am unable to view the data correctly in my Time Series graph because it shows Inappropriate Data for Continuous Analysis at the time of creating the Graph. Can anybody h

  • I have a price list I created in Pages and am

    I have a price list I created in Pages, and am having a devil of a time trying to figure out how to alphabetize the list. List shows my pricing compared to manufacture's, and original list was not alphabetized. thanks in advance for any help!