Graphic issue with my Imac 27"

Hi
I have an issue with my graphic on my Imac 27", which has going on for 1 month now. If i start up the computer normally there will be a failure in the graphic after the Apple icon has disapperead, which means that I´m not able to see anything except some vertically/horizontally lines on the screen.
BUT if I press down "Shift" while starting the computer and thereby start up in safe mode, then the graphic is perfect (unless a small rectangle which follows the mouse cursor) and I can use the computer almost normal. The sound is disabled, but perhaps that is part of running safe mode.
Therefore it seems more like a software error than hardware error, since graphic is normal in safe mode. Recently (3 days ago) I got an information of free update to Yosemite and I thought that it would solve my problem if it was a software issue, but unfortunately the problem was exactly the same after the update, that I can only start the computer in safe mode.
My Imac is from 2009 and is model A1312 with a ATI Radeon HD 4670 graphic card.
Does anyone know this issue or can support me what to do?
Thanks in advance - Ulrick, Denmark

Hi Lomborg,
If you are having an issue with the display of your iMac, I would suggest that you troubleshoot using the steps in this article -
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Thanks for using Apple Support Communities.
Best,
Brett L

Similar Messages

Graphic Issues with Leopard - iMac 24" White GeForce 7300 GT

Upon installing Leopard, I've noticed several graphics issues and general lag and delayed response with the interface. I'm running a 24" iMac 2.16ghz White early 2007, 3gb of RAM, with the GeForce 7300GT card. I have Time Machine disabled, and Spotlight has fully indexed.
When installing Leopard, I did an "Erase and Install" and have manually installed my Applications after the Leopard install. I'm using only a few applications that are all "Leopard ready" and have a relatively clean system at this point. I have also cleaned the PRAM, per the recommendations in some of the threads ive read, which didn't seem to correct the issue in this case.
It seems that any time I run any type of video or graphical application, such as Photo Booth, World of Warcraft, iChat, etc, I get a large amount of lag and slow response with the interface. Windows respond very slowly, and the applications freeze for 15-20 seconds. Even when not engaging any applications, opening folders in the finder as well as the dock appear to stall and respond very slowly.
Aside from these issues, Leopard has performed very well and I have had no other issues. Quicklook and coverflow all seem to respond very quickly and smoothly. My guess is that it may be driver related as it seems to be centered around items that are engaging the video card, though it is strange how some graphical effects seem to work smoothly while others are rather choppy. I have been watching the Activity Monitor and there don't appear to be any processes that are sucking up CPU, and nothing obvious that may be reducing performance.
I'm just curious if anyone else has noticed anything similar to this on similar hardware, or possibly may know what the culprit could be. My best guess, again, is that it could be the drivers or firmware with this specific hardware that I'm using.
Thanks for your time

I've had the same graphics issues with my white iMac 24 (serial no starts W8638), but with the GeForce 7600 card. AppleCare got me to do all the usual stuff (reset PRAM, clean Leopard install etc) but problems continued. The usual pattern is that after a while horizontal lines appear (usually in Safari) and things deteriorate form then on until there is so much pixellation that I have to turn off and back on.
Yesterday I ran for several hours using SMCFanControl to set the fans to max and had no problems, so my suspicion is that the additional graphics requirements of Leopard are over-heating the graphics card or logic board.
The Apple engineer took the machine away today and said they'll probably replace the logic board and graphics card (I think they can't change one without the other in the iMac?).
Will be a few days but I'll report back on what repairs they make and whether they solve the problem. My fear is that any changes they make will have no effect if its a design problem and the card is just not up to the job without over-heating. Though it could be the card just needs a good clean
Has anyone else tried increasing fan speed?

Re: Graphic Issues with Leopard - iMac 24" White GeForce 7300 GT

I noticed the same issue. It's especially noticeable in Photo Booth. The video and sound don't sync up.

I've had the same graphics issues with my white iMac 24 (serial no starts W8638), but with the GeForce 7600 card. AppleCare got me to do all the usual stuff (reset PRAM, clean Leopard install etc) but problems continued. The usual pattern is that after a while horizontal lines appear (usually in Safari) and things deteriorate form then on until there is so much pixellation that I have to turn off and back on.
Yesterday I ran for several hours using SMCFanControl to set the fans to max and had no problems, so my suspicion is that the additional graphics requirements of Leopard are over-heating the graphics card or logic board.
The Apple engineer took the machine away today and said they'll probably replace the logic board and graphics card (I think they can't change one without the other in the iMac?).
Will be a few days but I'll report back on what repairs they make and whether they solve the problem. My fear is that any changes they make will have no effect if its a design problem and the card is just not up to the job without over-heating. Though it could be the card just needs a good clean
Has anyone else tried increasing fan speed?

Graphical issues with 2011 iMac and Lion

I have a 2011 27" iMac (core i7 and AMD Radeon HD 6970M 2GB) with 2 external displays, most of the graphical issues are present in the external displays but the menu bar, dock and volume popup all appeared distorted on the main display.
On the external display most apps look like this http://i.imgur.com/FQ0AJ.png
there are a few exceptions like steam, safari and itunes, these apps don't show any distortion apart from when being switched the the other displays though, almost all other apps apear disdorted (as shown in the image) on the external displays.
I never had these issues with Snow Leopard but as far as I can tell its some kind of graphics driver problem, don't know how this wasn't spotted in the beta..
More images:
http://imgur.com/bK3jBl&RSaix
http://imgur.com/bK3jB&RSaixl

I also have a 27 in iMac Core i7 3.4 with the 2GB Graphics Card.
I called apple care and informed them + I recorded a video of it happening with ScreenFlow and sent it to apple. Please call apple care and inform them so they escalate this issue.
When I called them they sent me a file to Capture the Data of my computer to see what happened and what caused it.
By the way this computer should be able to connect with 6 screens simultaneously.
Please if you are experiencing this issue write here to inform apple about and call apple care or see the genius bar.
Thanks

Mac Book Pro 13 inch Graphics Issue with Yosemite

I have a major graphics issue with my Mac Book Pro mid 2010 after upgrading to Yosemite. I have a 2.66ghz with 8gb memory and 320M 256 MB NVIDIA graphics card. Since upgrading to Yosemite (after a clean install) I have had the following issue that are driving me crazy;
When I use more than one program my screen displays large blocks of unrecognisable fuzziness. I have two screen working off my Mac Book Pro, one is the Apple 27 inch theatre screen.
My system works slow despite have ample free memory available on my disk (over 150gb)
It is becoming an increasing concern as this issue builds up over the day to the point where I need to reboot to fix, however as soon as I use Photoshop the system almost grinds to a halt. Other issues that are bearable but ned addressing include;
Keyboard often does not work on startup and requires you to pull out the keyboard and reconnect (intermittent).
Lost email when sent (intermittent). I had hoped that this would be fixed in this updated release.
Laggy behaviour in general.
I am hoping someone has an idea to fix these issues or are also sharing my frustration. Can someone suggest fix as this is not a workable situation for Mac book Pro users and 2010 is not that of an old computer. Apple???

So you erased your drive and installed 10.10 and then 10.10.1 and everything else was t hrough Setup Assistant, through reinstalls, or through TimeMachine restore?
A four-year old laptop may be at the point where that small older gpu and processors have more trouble.
you might want to hold off and go back to Mavericks or whatever you had - hopefully you cloned that system before doing clean install, upgrade to 16GB, maybe throw in an SSD... or save and get the next MacBook Pro to come out.
And you checked your apps at http://www.roaringapps.com for compatibility.
Might help just to see what if anything shows up in output from Etrecheck.
Probably thought this was laptop MacBook Pro, it is not, probably best moved to Yosemite forum.

Graphics issues with MacBook Pro Retina

I bought my 15" MBPr in July and have been living with these issues since the beginning. Generally the issue happens when scrolling or writing in forms on web pages in Safari. Often times pieces of the web page will stick or ghost. This also sometimes happens when viewing photos on FaceBook. Anyone else having similar issues?

A number of folks have had graphics issues with the Retina display model... since you're still under warranty, take your unit to your local Apple Store or an AASP and reproduce the problem for them. They should have a 'fix' - even if it means replacing the logic board - that will be of no cost to you.
I couldn't have put up with that as long as you have...
Clinton

Wake issues with 24" iMac

I am having the issue with my iMac lab. Units will go to sleep and when a student tries to use the unit there is no response from keyboard but mouse will respond. They need to be restarted to resolve the issue but should it go to sleep again we start the process all over. I have 17 in this lab and have been sending them in for repair two at a time. They replaced the DC/SATA cable on the first two and it resolved nothing. Resetting PRAM and PMU also did not correct the issue.
Any ideas? Hardware? Software?

I have a computer lab with 25 with the same problem. I found this happened after they keyboard update. Has anyone really solved this problem with the keyboards not responding after the computers go to sleep? We have to restart several every day, every hour. What is apple doing with this?

Graphics issue with Jdev and Ubuntu Maverick

Hi,
I just upgraded one machine Dell Optiplex 755 to Ubuntu Maverick 10.10 with Java 1.6.0.23 and Oracle JDeveloper 11g 11.1.1.3.0. Since then, my Jdev is not working properly from a graphic point of view. When you start it , it doesn't show all the icons in the console. You have to pass the mouse over them to be shown, and as soon as you minimize/maximize the window, those are hidden again. It's like Java or Jdev are not sending the correct commands to repaint the screen.
I don't have any similar graphic issue with any other application like openOffice or Oracle SQL datamodeler. But I do have the same issue with the Oracle SQL developer application, the icons are not shown unless you pass the mouse over them and they disappear if you minimize/maximize the window. Jdev and SQL Developer have a similar interface so I think is related with Java and these specific interfaces.
The drivers of the graphic card, ATI Radeon HD 2400 XT, are up to date and I already tried with different tweakings in the graphical properties.
Does any of you have any suggestion/solution?
This didn't happen with an Ubuntu 9.10 and old versions of java and Jdev installed in the same machine.
Greetings and thank you.
Edited by: user13698736 on Feb 14, 2011 2:26 AM

Hello,
I have changed my graphic card. i mean, replace ATI Radeon by Gforce.
Thanks

Hi , I suhail khan from india and i am user of iMac system 10,1.These days i am facing the sound enabling issue with my iMac system I am not able to hear sound in my iMac system.So kindly suggest me how to enable sound in my iMac . Please no the needful.

Hi , I suhail khan from india and i am user of iMac system 10,1.These days i am facing the sound enabling issue with my iMac system I am not able to hear sound in my iMac system.So kindly suggest me how to enable sound in my iMac . Please no the needful.

Take each of the following steps that you haven't already tried.
1. If you've recently plugged anything into the audio-out (headphone) port, plug and unplug it a couple of times.
2. From the menu bar, select
 ▹ System Preferences ▹ Sound ▹ Output
Check the settings. The internal speakers should be selected as the output device, the Mute box should not be checked, and the volume slider should be at least halfway to the right.
3. Look inside the headphone port. If a red light is coming from the port, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a headphone mini-stereo jack of the proper size.Inserting any kind of tool in the port may cause damage that won't be covered by your warranty.
4. Boot in safe mode by holding down the shift key at the startup chime. It will take much longer than usual. You don't have to log in; just reboot as usual (without holding any keys) when the login screen appears. (Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode.)
5. Reset the NVRAM.
6. Reset the SMC.
7. Reinstall OS X after backing up all data as a precaution. You won't need your backup unless something goes wrong.
8. Make a "Genius" appointment at an Apple Store.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to bare metal from any of them.) Don’t erase the recovery partition, if present.
*An SSD doesn't need to be zeroed.

IMac isn't loading a specific website (can't connect to that server), regardless of browser, though the same website will load on other computers on same network. Is it an issue with the iMac's settings?

Our iMac isn't loading a specific website (we get a message saying it can't connect to that specific server), regardless of browser (I've tried it in Chrome, Safari, and Firefox). However, the same website, which is for a major medical provider, loads without any issue on our other computers on the same wireless network. Is it an issue with the iMac's settings? All other websites seem to be loading without issue on the iMac.

... Is it an issue with the iMac's settings?
Possibly. Make sure you are not using a proxy server. Look in Safari Preferences > Advanced > Proxies > "Change Settings..." This will take you to the applicable Network Preferences. Make sure that nothing is selected in the "select a protocol to configure" list. It should look like this:
Still not working?
Locate your Terminal app. It is in your Utilities folder. Open Terminal.
In Terminal, copy (triple-click) and paste the following line:
osascript -e 'tell application "System Events" to get name of every login item'
This will produce a list of all your account login items.
While you are in Terminal, copy (triple-click) and paste the following line:
kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'
This will produce a list of all non-Apple kernel extensions. There will be few, if any.
Post the results of the above.

Does anyone have graphical Issues with the late 2006 iMac

I just wanted to ask if anyone had the graphical issue on the late 2006 iMac, I don't have it though, I don't know why, but I do have the gfx ard that does the issue, the ATI radeon x1600. I just want people to tell me if they have it because, I'll try to help if needed. But i think I don't have it because I bought the last one before the 2007 version came out. But anyways just ask me if you need help or questions.

card*

Late 2012 iMac graphics issues with Mavricks

Everr since I updated to Mavricks I've been experiencing graphics issues.
When waking from sleep or screen saver, the area outside the active window is black, including the app bar at the bottom. Moving my mouse around those areas sometimes will display my background from black but not always.
Also, when playing CIV 5 on occasion, the computer will restart itself and take me back to the log-in window

OS X: Login window partially appears, cursor movement redraws screen

Graphical issue with QuarkXPress

Hi I have an early 2008 24" iMac. I recently had an issue with QuarkXPress 8 that I never had before.
When I launch the app it takes a huge amount of time (as usual) but at a point a "curtain " of coloured pixels goes up to down of the whole screen and inverting ist colors. When it gets to the bottom the computer is frozen. To avoid that i can make a screenshot or change desktop, wich stops the curtain.
This only happens with QuarkXPress and I han no graphical issues until then. All my software is up yo date.
Here's a screenshots of the issue:

Hi cobhc6,
I would first apply the (free) update to QuarkXPress 8.5.1 (http://www.quark.com/Support/Downloads/Details.aspx?fid=200) and then delete your preferences.
Does it still happen then?
Regards
Matthias

Iris Pro and Bootcamp (Have graphical ISSUES with COD AW)

Hello everybody!
I'm having a graphics-issue when playing CoD AW on Windows 8.1 Enteprise.
Im using a 21,5 iMac with Boot Camp.
Have the latest Intel Drivers 10.18.10.3960
The game runs good! But sometimes just for a few seconds my screen turns out like this.. And then dissapears.
Heres a picture about it...
Pls help
Regards and Merry X-mas!

Google is your friend. Easy? Probably not but it appears doable. Proceed at your own risk.
http://arstechnica.com/information-technology/2012/11/no-support-no-problem-inst alling-windows-8-on-a-mac-with-boot-camp/

Graphical issues with JFileChooser

I have reduced the problem as much as I could:
package javaapplication4;
import java.applet.Applet;
import javax.swing.*;
public class NewJApplet extends JApplet {
    public void init() {}
    public void start() {
        javax.swing.JFileChooser FC = new javax.swing.JFileChooser();
        if (FC.showOpenDialog(this) == javax.swing.JFileChooser.APPROVE_OPTION) {}
}If I start this as an Applet the FileChooser sometimes has [graphical issues|http://arokh.dnsalias.org/Images/FileChooser.png]. (ErrorLog)
If started as a normal app (through main method) it works perfectly fine.
Can anybody also reproduce/solve this?
I'm using FireFox3 B5 (IE7 also shows this problem) & WinXP SP2
Sun Java 6 Update 6

I also have a 27 in iMac Core i7 3.4 with the 2GB Graphics Card.
I called apple care and informed them + I recorded a video of it happening with ScreenFlow and sent it to apple. Please call apple care and inform them so they escalate this issue.
When I called them they sent me a file to Capture the Data of my computer to see what happened and what caused it.
By the way this computer should be able to connect with 6 screens simultaneously.
Please if you are experiencing this issue write here to inform apple about and call apple care or see the genius bar.
Thanks

Graphic issue with my Imac 27"

Similar Messages

Maybe you are looking for