IMac 24" Display problem

Hi,
Im having display problem with my iMac 24" Early 2008.
http://www.hockeystat.net/video.jpg
I cant boot, after 20 seconds the OS freeze.
I ran a full diagnostic with the Hardware Test...no error.
http://www.hockeystat.net/video_test.jpg
Any idea ?
Thank you
Luc

1 - connect an external display; if the external display works ok then there may be a problem with your iMac's display panel or perhaps the inverter board. If the external display does not work then the problem may be with the graphics chip on the logic board.
2 - try booting from the OS X installation DVD? Will it boot that way?
3 - did you recently upgrade to Snow Leopard? If so, did this problem start immediately after upgrading? If you upgraded, did you do an erase & install; or an archive & install?
4 - do you have AppleCare coverage?

Similar Messages

  • IMac ghost display problems (and apple technicians weren't able to solve)

    Hi,
    So my problem here is quite weird. I tried researching the forum for something like this, but nothing really came close to whats happening to my iMac.
    I have an Intel-Based iMac, 24 inch screen.
    I bought it on 2008. Since late 2008/early 2009, i had these weird "letters" underneath all my pictures. I work with photography/video editing, so this was very annoying, yet i kept ignoring, since the rest was working fine.
    Then slowly the iMac ran slower, more sluggish-y. Like if all life was sucked out of it, sort of description.
    Then, 2 months ago, there was a total failure of the HD. I was lucky to be able to back up all, before it didnt let me even enter the computer. It would just think for hours.
    I brought it to the technical support near to my home, and i also told them about those weird "letters" on the left side of my screen. They said it was due to my hard disk, and i was, ok...since the hard disk had a failure.
    They did a check up, and yep, the hard disk was k.o, evidently. They replaced the hard disk, and told me all was fine.
    It did "seem" fine for the first couple days. No more running slow, no weird letters that would distort my pictures (for example, i could see my iTunes music list underneath a picture i was working on photoshop, or a video i was displaying!).
    After a couple of days...same story started again. The left side of the screen was flooded by all underneath (open windows, the desktop icons, the texts i had open on safari, basically anything would appear translucently underneath any image or video i would open). Then, flash player would crash every 3 videos, blank cd's would get automatically ejected so i couldnt burn any cd, computer would run slow etc... etc...
    So i cleaned up my computer, did a back up, erased all, and ready to bring it up to technical support again. And misteriously, all symptoms disappeared. So i explained to them what happened, and they said probably it was the graphic card.
    I thought finally my problem was solved.
    24 hrs later, i got an email that my computer was fixed. That it was only a hard disk "permits" issue, and they solved it.
    I have had the computer for 3 days, and the screen problem is starting again, and now the permits are perfectly fine in my computer, and nothing comes out as wrong in the diagnostics tool!!!!
    I didnt even work with the computer, but now i can see my itunes list through the safari window, as grey letters....kinda 3D, popping out. Its very weird. And i cant capture it because when i take a screen capture, it all appears fine.
    Left side of screen is the affected. And no, its not a condensation issue.
    Also, i can see some lines when i start up the computer. On the grey screen portion of the start up.
    I dont know what it can be anymore. I know this is a long post, but i had to explain all what happened to it.
    Any help would be great.
    Thanks

    You might want to clean up your profile. An iMac G5 will not run Mac OS X 10.6.4!
    My experience with things appearing on screen but not in a screen capture is that it is on the display itself and not involving the GPU.
    I think that you have image persistence, similar to CRT burn in. It is caused by having the same image appear in the same location over long periods of time, like a Safari window always in the same location, or an iTunes window, etc. The pixels get stuck showing that image.
    There are different little apps that folks have developed to get the pixels unstuck. Google LCD image persistence and you can find a number of them.
    Here is one suggestion;
    http://www.jscreenfix.com/
    Dah•veed

  • My 21" Imac has display problems

    I have a problem with my 21" Imac display when moving Icons the diplay image become corrupt

    I'm not sure what you mean. Reply in more detail.

  • IMac external display problem

    Hi,
    I have a spare 22" 1080p tv sitting around so I tried to set it up as an external display for my 21.5" iMac.  I was able to get it working (MDP to HDMI) but the resolution and color is not so great, and when I look at the external display in System Profiler it says something about it being a tv (which it is).  My question is can I do anything better than what I have experienced so far?  Thanks for the help,
    rc
    Note - I also tried running the Color Profile app that appears on the external display and while it did improve it some once I clicked on save it never seemed to stick...

    Go to: System Preferences > Displays select the Color tab > uncheck "Show profiles for this display only" and try one of the RGB profiles to see if it is better for you.
    Then if you are not happy with one of those..? Try Selecting, Calibrating and Saving a different Profile, other than the default one offered for that monitor.

  • 24"imac with display problems

    I purchased my iMac from the local apple store on august 31st, that night after about 2 hours of use I noticed the screen had become quite pixelated I rebooted and everything was fine. Since that day I have had many of the same occurences. I have an appointment tomorrow with the local apple store to hopefully get this resolved. Has anyone else had similar problems? I have taken some pictures to show them at the apple store.
    http://gallery.mac.com/zdessa#100003
    Message was edited by: dc297spec

    Hi, I have the same Problem with my iMac 24" 2.8 GHz. I used Rapid Weaver and suddenly there were a "pixelstorm" on my screen. I rebooted the mac and it worked perfect. But after a while using Rapid Weaver the screen turned off completely. That happend twice.
    The Problem is, that this seems to be a fault in a lot of the new iMacs. A friend had the same Pixelstorm and sent the iMac back. Tomorrow he will get the replaced Mac.
    Here you can see, what happens on his screen:
    http://www.ulf-bellersheim.de/imac.AVI
    http://www.ulf-bellersheim.de/imac.JPG
    http://www.ulf-bellersheim.de/imac2.AVI

  • Intel iMac 24 display problem with colours

    Hi,
    Tonight for no apparent reason my imac screen has gone weird. The colours are reversed with black becoming white and vice versa.
    Restart - no change
    Display resolution - changed but made no effect
    Ran CD hardware diagnostic to no avail
    Weird thing - when I boot up in Windows its fine.
    When I log in with another account name its fine
    Please help

    Beatsuite.com:
    Check Universal Access in System Preferences and see if white on black is checked instead of black on white under Display. If not that then I don't know.

  • IMac as Display problem

    Hi all.  I have an issue and would like to know if it can be resolved easily.
    My iMac 2009 has major issues.  I tried to reformat the drive and reinstall the system but the installation fails every time.  I replaced the internal drive but still no installation was possible.  An external drive with a system works, but the iMac is extremely slow and can take 10 minutes just to open an app.  It was very slow with an internal drive when it was working anyway.
    I resolved to by a Macbook Pro and use the iMac as a monitor (27 in) using a Thunderbolt cable. But it seems that without a system attached to the iMac, it keeps looking for a system and I cannot use it as a monitor.
    You could say that I only need to let the external drive with a system connected to it and it will work, but is there a way to make it work without practically losing my drive?  Is there a key that I could use so it stops looking for a system for example?
    Thanks for any help.

    Hi all.  I have an issue and would like to know if it can be resolved easily.
    My iMac 2009 has major issues.  I tried to reformat the drive and reinstall the system but the installation fails every time.  I replaced the internal drive but still no installation was possible.  An external drive with a system works, but the iMac is extremely slow and can take 10 minutes just to open an app.  It was very slow with an internal drive when it was working anyway.
    I resolved to by a Macbook Pro and use the iMac as a monitor (27 in) using a Thunderbolt cable. But it seems that without a system attached to the iMac, it keeps looking for a system and I cannot use it as a monitor.
    You could say that I only need to let the external drive with a system connected to it and it will work, but is there a way to make it work without practically losing my drive?  Is there a key that I could use so it stops looking for a system for example?
    Thanks for any help.

  • Display problem, new motherboard.

    I am posting really to vent. I have a sick iMac with display problems. It's got vertical white lines and loss of colors. ChumpUSA indicates that the motherboard will need to be replaced and it's going to take four to five business days to get the part.
    I purchased the iMac for a client who I encouraged to switch. They trust me and have purchased two other Macs. They are doing fine, so they aren't soured yet. It's a difficult position in which to find myself. Computers have trouble and need to be fixed, knock wood, I've had very few hardware problems in my 10+ years using Apple products.
    I'm just in a bad spot with the failure of the motherboard (poor quality?) and the length of time my client is without a computer for one of his employees.
    We will work around it, of course. I just don't see why it would take a week to get a part.
    Any advise or words of encouragement are appreciated.

    Sorted myself but will post solution in case others need it.
    Remembered what I had done ages ago when looking at how to stop all recent pages appearing on a new tab.
    To get new SEARCHES appearing in a new tab go to address bar and type
    about:config.................ignore the Dragons
    then go to browser:search:openintab and set to true

  • Windows 7 64 bit on iMac display problems and instability

    I received my iMac 27" quad core with 8 gig ram & 2 x 1 TB hard drives last Friday. I'm using Boot Camp to run windows 7 64 bit on maximum 2560 x 1440 screen resolution.
    I get intermittent but often display problems in windows 7. I get areas of the screen covered in little yellow dots or blue squares (never red artefacts.) This will happen at random areas of the screen, inside an open window, around borders of windows and so on. Most often the screen will go black and come back with a message in the bottom right corner of the screen saying 'Display driver has stopped responding and has recovered' with the sub message saying 'display driver ATI radeon family stopped....etc'. Sometimes I lose the screen wallpaper. Once I've had the system just shut down, once I've had Photoshop seize up and I had to do a cold reboot. Could this be an overheating problem or resolution too high problem or driver problem? Windows 7 tells me my drivers are up to date. I tried installing the drivers for the card from ATI's website which made no difference
    The reason I bought a Mac is because it's the only effective way to code for the Mac family of OS's in XCode. The reason I didn't just attach a miniMac to my PC monitor was because there's rather a lot of advertising by Apple about the fact that you can use a Mac with a PC OS via Apple's own Boot Camp. Now I have a lot of Windows software (some of which is not available for the Mac or requires buying again) sitting on an unstable system. Any ideas would be much appreciated...

    Sorry, that thread got moved for edit and as a user tip... which I didn't want and won't be doing....
    Here is the post:
    A tip and workaround for how to get ATI mobility/laptop drivers so that Windows no longer thinks the ATI is a desktop card:
    http://discussions.apple.com/thread.jspa?messageID=11286987
    Summary (my own edit steps):
    1. Install Boot Camp 3.0 and upgrade to 3.1
    2. Uninstall graphic drivers and run Driver Sweeper
    http://www.guru3d.com/category/driversweeper/
    instead of:
    removing the crashing driver by going into windows 7 setup via its install cd and deleting the ati driver manaully
    3. Install ATI Mobility (link)
    4. Uninstall ATI (Programs control panel?) Device Manager (rollback; uninstall?)
    5. Device Nanager: update driver and BROWSE BACK to 8.681 (the original apple driver that was causing freezes and purple artifacts) - navigate to /Apple/Drivers/ATI
    (Apple uses) a 4850 card in the iMac, its modified a bit for apple. Enough that desktop drivers don't work, and modded-for-laptop desktop drivers don't work either.
    Now the upshot of using modified drivers is that it FORCES the catalyst control panel to be installed, meaning you get a few more options to mess around with the card.
    I couldn't use the original apple drive, it locks up, the newer one had banding, the newer radeon drivers direct form ATI wouldn't work until they were modded and then they cause black screens.
    SO the solution, as obscure as it was, was to download ACTUAL mobility Radeon drivers - version 10.3 still, but made for laptops.
    http://support.amd.com/us/gpudownload/Pages/index.aspx
    THESE drivers I was able to install - and here is where things changed.
    THIS driver changed they way windows saw the video card in device manager.
    As I mentioned before, its NOT a desktop card, its a modified laptop card, but installing mac drivers makes windows THINK its a full desktop card, and running the original 8.681 driver crashed it.
    Once installed 10.3 LAPTOP driver it now appeared in device manager as a MOBILITY card.
    +These Steps "should" work:+
    delete ATI driver manually
    reinstall apple driver after that and see if that works,
    otherwise try the steps above
    (mod drivers, remove via windows recovery off setup disk, install laptop drivers, reinstall apple driver over it)

  • 2x iMac G5: Both Logic Board and Display Problems, Warrenty?

    Hello,
    Thank you for looking at this topic.
    I am Jeroen from The Netherlands and proud owner of several Mac Mini's, iMac's and Macbook's. I have 2times the iMac G5, a beautiful machine, but both not working since 2 months.
    I have two times the iMac G5 with iSight, both have logic board and display problems.
    The first iMac doenst start at all, black screen, i hear the chime, but nothing happening. After a minute i see one horizantal white stripe but nothing happens.
    The second iMac has weird horizantal stripes also, but the computer starts. It gives a finder and questionmark icon. After a while the fans go crazy.
    Both these symptons are widely known on the internet. I would like to get this fixed, but prices are crazy. And because this is a common issue I would expect to get this fixed for no costs. I have contacted several Apple resellers but they shown me high prices and bad services. On these forums I've saw people in the USA who get this fixed free of charge.
    Does anyone has any advice for me? I'll call apple USA this morning.
    Thankyou for ur time.

    Welcome to Apple Discussions.
    I know of no repair extension authorization which provides for the repair of either computer you describe beyond its original 12 month period of coverage. If either machine is covered by a warranty extension program provided by AppleCare, then the parts, labor or both required to replace the defective components may be offered at no charge to you. Final determination of eligibility is made at the part level by authorized Apple service providers or dealers and by the specific serial number of the machine submitted for service.
    Absent a warranty extension, however, it is quite likely that you will have to pay for the repairs is you elect to have them performed.

  • Hello to all: My iMac has developed a video display problem. It displays everything in cartoon like colors - purple, green, blue. Can this be repaired? Is there a way to output to a different monitor? Thanks in advance!  isplays

    Hello -
    My iMac has developed a video display problem. Everything now appears in a strange, cartoonish way. Purples, greens, blues. Can this be fixed, and if so, any idea how much it might cost? Also, could I output to a seperate monitor? I plan to replace the unit , but cannot right now. Thanks!

    Go to System Preferences > Universal Access > Seeing.
    In the Display area, reset it to "Black on white" by clicking that checkbox.
    You can also reset it by pressing Command-Option-Control-8

  • IMac display problems with gray to white gradients

    My early 2006 iMac 20 has problems displaying gradients going from pure white to light gray. The web colors are #000000 to #EEEEEE (RGB 238 238 238 and 255 255 255)
    My cheaper Acer and Fijutsu Siemens displays can handle this very well, but my iMac cuts the gradient prematurely and makes the gray darker. It looks as if the gradient on my iMac is a dark gray bar and a white bar, instead of a smooth gradient compared on the two other monitors.
    I know the iMac doesn't have the best display for a designers need, but it can't be that 'cheap' or can it? I have tried to calibrate the display with both manual expert mode and using ColorSpyder. The latter gave me a blue/magenta colormode with beige gamma each time, so I gave that up.
    The frustration is that I have use my iMac as secondary display and one of the other primary. It is not the optimal arrangement for an office environment.
    Does anyone have the same problem or do they have any good advice for me as of what to do?

    Thanks for all the speedy replies.
    Barbara:
    This was reassuring news, I have been using Spyder2express with both the bundled calibration software and another professional (and high revered) software, which name is completely lost to me right now.
    In both cases, with blinds shut, lights turned off and no other interference, I got a beige/dark result from both. With a bit of flicking with the settings, I managed to produce only a sick magenta result.
    Your post reassures me that it can be done, so I am going to borrow the Spyder2 again and try all over, even read myself to death on the instructions once more.

  • Display problems imac

    how many people have problems with imac 2011 display?

    What kind of problem are you referring to? Is it with a 21.5" or 27" or external display? Is it with a specific Application or at all times? Are you doing a survey?

  • Bootcamp display problems - aluminium iMac

    Hi
    I have an aluminium iMac and I have recently installed windows on it. Everything went fine but there seems to be a problem with the display driver?
    What happens is that when I'm doing something, the computer seems to freeze (music lags) then the display goes black and the computer runs as normal (the music starts playing normally again.)
    I thought it was only when I was playing Counter Strike Source but it happens when I'm not too. Is anyone else experiencing this? Any fixes/ suggestions?
    I've tried repairing bootcamp drivers but to no avail.
    Thanks

    I was having Display Problems on my Intel 20" iMac- weird artifacts, lines, distortion of parts of the screen, weird color patterns, etc... all seemed to happen mostly during viewing video on the computer.
    I worried that it was the card itself, and after about 4-5 years of use, was simply going bad-- and some articles and posts I found online seemed to confirm that this was possible--
    I kept reading and eventually found posts about using smcFanControl to raise the fan rpm manually to try to keep things cooler in there... It seemed to work somewhat but not really, and the artifacts would continue and the computer itself was hot. The temp was usually constantly around 145F with lots of artifacts and distortion. When it wasn't running video or being used a lot, it would cool down and the artifacts would wane.
    I found a step by step guide on ifixit.com to opening the iMac body to replace various components, etc. so I got the bright idea of opening it and blowing it out with compressed air.
    It wasn't that hard to open and the guide was easy to follow, I went as far as removing the screen, which exposed one side of the guts and the fans. I blew it all out, it was dusty in there, and a lot of dust came out.
    I put it all back and am running a netflix movie- temp is staying at about 125 +- and there are no artifacts...!!
    I think I might have actually fixed it-- If you have a mac that is running hot and has weird screen artifacts, behavior, etc... I suggest dusting it and blowing out vents, fans, etc to allow it to run cooler....
    Oh, My computer is way out of warranty, and I don't have AppleCare, and everything is backed up, etc... open at your own risk, knowing you will probably void any warranty.

  • Imac display problem, the resolution seems to be unusual, top bar and all folders on the desktop background is off the screen

    Need help with 21" imac display problem. The resolution seems to be unsual, everything on the desktop background goes off the screen. The resolution is set at 1920 x 1080

    Quit the game and restart the iPad.
    To quit the game - Go to the home screen first by tapping the home button. Quit/close open apps by double tapping the home button and the task bar will appear with all of you recent/open apps displayed at the bottom. Tap and hold down on any app icon until it begins to wiggle. Tap the minus sign in the upper left corner to close the apps. Restart the iPad. Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
    If that doesn't work try this.
    Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.

Maybe you are looking for