Horizontal lines on imac display, video card going bad?

I have horizontal lines and a triangular shaped artifact on my 24 inch Imac display. This happens after quite awhile of use, so I am thinking it might be the video card is about to go. Also, have issues with viewing flash videos, the browser (safari) will just quit responding, sometimes it will recover. Most times I have to reboot the machine. I believe all these syptoms are related. Any ideas?

Welcome to the Apple Support Communities
Your graphic card is damaged. Unfortunately, the only thing you can do is to take the Mac to an Apple Store or reseller to get the computer repaired.
Both problems may be related, because Flash uses the graphic card and it often fails

Similar Messages

  • Anyone had horizontal lines on iMac display.

    Does anyone know why I have horizontal lines showing up on my imac.  The genius support at the apple store told me it was the display and would cost $400 to fix. I have owned it 3 years and 1 month.

    I have the same problems, and did some googling. I found out the white 24 inch (late 2006 to early 2007) Imacs have a video card problem. The soldering on these units tend to go bad, the card is the Nvidia GeForce 7300 GT.
    These cards go for about $280 plus installation so I can see where it would cost that much.

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    Cheers

    this could be caused by any number of things. i would reset the pram holding apple-option-p-r and that might help. but i would also run the apple hardware test. you can do that by booting to your install disk holding the d key. could be the logic board. but could also be inverter, or video card. it could even be software related. i would definitely run apple hardware test though and see if everything checks out. [ 8 ) ]

  • Video card going out?

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    The lines look just like this: http://farm4.static.flickr.com/3243/25990075431695b18555b.jpg
    Message was edited by: Derek Collier

    Hi
    Actually I noticed it first on the upgrade screen from Tiger to Leopard, and it then became progressively worse, even before 10.5.2.
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    Message was edited by: GLiMAC

  • Horizontal Lines Across MBP Display

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    Had a 24" iMac that developed faint horizontal lines across the lcd that got progressively darker the longer the computer was on. Had the lcd replaced by Apple twice, but after a couple of weeks the problem returned. They gave me a new iMac, but a month in I have the same problem with the new machine. Has anyone encountered this problem? Is it an inherent issue with iMac lcds or is it something external affecting my machine? And I'm not talking poltergeist. Help, want this fixed.

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    I read in a forum where the video chip (GPU - graphics processing unit) was heat sensitive and thought that after 3+ years, maybe it was dusty in there... I installed the iStat widget to monitor the temp of the GPU and installed a fan control (software) where you can increase the minimum speed of the hard drive fan (allegedly located above the GPU). I also put the end of the vacuum on the fan vent just above where the power cord goes into the back of the monitor and let it run for a while hoping to clean things out...
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  • Can my Late 2009 24" iMac's video card be replaced without replacing the entire logic board?

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    I appreciate your reply and you are correct about it being an Early 2009 iMac.
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    http://ifixit-guide-pdfs.s3.amazonaws.com/guide_13765_en.pdf
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    Will W.

  • IMac and video card ATI Radeon HD 4850

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    crazy00eyes wrote:
    Much to my relief, Apple is replacing my 2008 24" iMac after I have brought it in to them 3 times for the same issue in a month (failure to startup, they have replaced two video cards, one MLB, and the display but the problem repeats itself within 1-2 weeks). They are replacing it with a newer model that has a 27" display, twice the ram (4 GB) and twice the HD space (1 TB). My question is about the video card in the new iMac, it is a ATI Radeon HD 4670 with 256 MB, and the card in my old iMac was a NVIDIA 8800 GS with 512 MB. My primary application for my iMac is gaming, which I believe makes the video card the most important component. Does anyone know the difference between 256 and 512 or anything about this new card? Should I ask them if I can pay to upgrade to the Radeon HD 4850 512 MB before I go in to pick up my new iMac?
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    I have switched from Elements 4 to Elements 9 for my video production, and I have not been able to get rid of the horizontal lines in ANY file type or with any setting.  I have tried everything I've read so far on these forums.
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  • MacPro Early 2008 Display/Video Card Problem

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    *Kevin C.*

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    Message was edited by: Michael Streubert

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    2/ has the number of connections (legs)
    3/ is the same pin out
    4/ has apple drivers !
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    custom mini

  • Start-up/Display Video Card Problem

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    I have the iMac G5 (NO iSight) and some months ago I discovered some random horizontal lines that went through the whole display up or down. They are not there the whole time, sometimes when I work with Aperture or even iPhoto or Safari the lines start to appear, or sometimes when I turn on the computer. I don't think they are linked with temperature, but I do think they are related to the processor use, as when they appear I hear the fans inside, which means the more of the processor is being used. I've also tried the iMac on different homes, so it's not energy related. I got the iMac to an Apple Authorized Retailer and they changed the logic board under the extended repair for the iMac G5, but that was no luck. The lines are still here, and they don't know what is causing them. Anyone knows what I could do to get the display fixed? Any part inside? Thanks, they are very annoying.

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