IMac Screen Distortion

I have an iMac in which boot camp and windows XP came pre-installed. The Mac screen video runs perfectly, but when I switch to windows XP screen the image deteriorates after 5-15 minutes. The distortion is preceded by a high pitched sound. Once the distortion becomes severe the entire screen begins to flicker. I have not found answer to this problem. Any help would be appreciated.

Is this what you guys are talking about? Is there a fix?
http://img291.imageshack.us/my.php?image=sc1dj4.jpg

Similar Messages

Screen distortion and crashes

I get a lot of screen distortion, and my iMac completely freezes or crashes. I get a video ram failure message when I run Techtool.
I've tried reinstalling the system, but it's still happening.
I had the logic board replaced while it was under warrantee, but I'm afraid it may need replacing again (pretty expensive even to do it myself).
Any thoughts???

One good generic troubleshooting step for this is to run Applejack.
Download:
http://sourceforge.net/projects/applejack/
Article on using:
http://reviews.cnet.com/8301-13727_7-10334620-263.html?tag=mfiredir
It runs in single user mode. After installing (you won't see it in the Applications Folder) hold CMD-S at startup. You will get a black screen with MS-DOS like text. Just follow the prompts: type in "applejack AUTO" and it will run through the following:
Correct any Disk problems.
Repair Permissions.
Clear out Cache Files.
Repair/check several plist files.
Dump the VM files for a fresh start.
Trash old Log files.
You can also run tasks selectively and for specific users by typing in "applejack."
The first reboot will take much longer than usual, as it rebuilds caches. It may take several restarts to see the benefits. Because of the deep cache cleaning in AUTO mode some applications may tell you they are being opened for the first time.
I would also run the Hardware Test in extended. Disconnect all peripherals except the Keyboard and Mouse
http://support.apple.com/kb/ht1509
On your Mac, you can get to the Hardware Test simply by restarting holding down the D key.

Kernel panic; screen distortions

Can someone help me to analyze what this System Diagnostic Report means? I have been experiencing random freezes and occasional screen distortion, usually horizontal lines, or zigzag graphics. Do I have a hardware problem here? My machine is a Late 2006 iMac running OSX 10.7.5.
Interval Since Last Panic Report: 2157356 sec
Panics Since Last Report:          1
Anonymous UUID:                    C607D585-09B7-4AA8-AA16-BBF56CD0202C
Thu Jun 27 12:39:44 2013
Machine-check capabilities (cpu 1) 0x0000000000000806:
family: 6 model: 15 stepping: 6 microcode: 199
Intel(R) Core(TM)2 CPU         T7200 @ 2.00GHz
6 error-reporting banks
threshold-based error status present
Machine-check status 0x0000000000000005:
restart IP valid
machine-check in progress
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0xb200004000000800 valid
MCA error code:            0x0800
Model specific error code: 0x0000
Other information:         0x00000040
Threshold-based status:    Undefined
Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
IA32_MC5_STATUS(0x415): 0xb200121020080400 valid
MCA error code:            0x0400
Model specific error code: 0x2008
Other information:         0x00001210
Threshold-based status:    Undefined
Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
panic(cpu 1 caller 0x2cf3cc): "Machine Check at 0x01b17f68, trapno:0x12, err:0x0," "registers:\n" "CR0: 0x8001003b, CR2: 0x10e86000, CR3: 0x00100000, CR4: 0x00000660\n" "EAX: 0x00000010, EBX: 0x055fd000, ECX: 0x00000001, EDX: 0x00000000\n" "ESP: 0x00a53c70, EBP: 0x00a53ca8, ESI: 0x00000000, EDI: 0x00000210\n" "EFL: 0x00000046, EIP: 0x01b17f68\n"@/SourceCache/xnu/xnu-1699.32.7/osfmk/i386/trap_native.c:258
Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
0x38d66f38 : 0x2203de (0x6b08cc 0x38d66f58 0x229fb0 0x0)
0x38d66f68 : 0x2cf3cc (0x6bde94 0x6bdfc8 0x1b17f68 0x12)
0x38d670d8 : 0x2cf409 (0x38d67110 0xde 0x6bdfc8 0x1)
0x38d670f8 : 0x2e6182 (0x38d67110 0x0 0x0 0x0)
0xa53ca8 : 0x1b0f9df (0x32cde100 0x2 0x55fd000 0x0)
0xa53d48 : 0x1b11c73 (0xffffffff 0x7fffffff 0x0 0x0)
0xa53dd8 : 0x2d0cde (0xffffffff 0x7fffffff 0xa53df8 0x2cd4ca)
0xa53df8 : 0x22d3e5 (0x32ced000 0x10a72832 0x15c3 0x32cedde0)
0xa53e38 : 0x22e1c0 (0x7ca03f8 0x32ced000 0x0 0x0)
0xa53e88 : 0x22f6c2 (0x7ca0414 0x2 0xa53ec8 0x240c87)
0xa53ee8 : 0x22f821 (0x21dff0 0x0 0x0 0x5a)
0xa53f08 : 0x21dfdb (0x21dff0 0x2 0x1c92cd48 0x15c3)
0xa53f28 : 0x2b7e16 (0xa53f50 0x0 0xa53f9c 0x8)
0xa53fc8 : 0x2e5bb7 (0x7c38610 0x1 0x10 0x7ea8b10)
      Kernel Extensions in backtrace:
         com.apple.driver.AppleIntelCPUPowerManagement(195.0)[D1550426-D346-4805-A777-06 63C69080DA]@0x1b0d000->0x1b36fff
BSD process name corresponding to current thread: WDDriveManagerSe
Mac OS version:
11G63
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:26:45 PDT 2012; root:xnu-1699.32.7~1/RELEASE_I386
Kernel UUID: 859B45FB-14BB-35ED-B823-08393C63E13B
System model name: iMac5,1 (Mac-F42786A9)

Hello Denise,
Trouble is it could be many things, on the face of it it looks like CPU, RAM, or...
Have you blown the dust out lately?
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...
http://support.apple.com/kb/HT3964
The WDDriveManagerSe is suspect also.
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts (Users & Groups in later OSX versions)>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons

OS X crashing & screen distortion

Hi all,
I am running 10.6.4 and for some time now, after the update to .3 and .4 my iMac has been crashing. What happens is it freezes with the spinning beach ball and becomes unresponsive. The mouse still moves and if video / audio is running in the background I can still hear it playing. I have no option but to hold the power button in and switch off / on.
Does this sound familiar to anyone? Are there any fixes?
The last time it happened I was running iTunes, Mail and Safari (which was streaming Sky Sports from the Sky website).
Also, I occasionally get image / screen distortion where part of the screen stretches and then returns. Has anyone had that also?
Many thanks,
Ian

Alt + tab isn't the default app switcher hot key sequence; command + tab is. But since I asked specifically about the command + option + escape hot key sequence, I wonder if you are using an Apple keyboard or perhaps a non-Apple one with differently marked keys. If so, try both the mapped & unmapped versions of the keys -- IOW, try all the modifier key combinations.
Also try temporarily disconnecting all non-essential peripherals like external drives or printers. Try starting up in Safe Mode & try logging into a newly created temporary user account. If the beach balls don't happen with any of these things, let us know.

Imac Screen gone black

Helpppp! My Imac screen went black or rather does not come up after the start up sound. I should say this was during a thunderstorm and I think I heard the spark of electricity around the system and shortly after the contents on screen became distorted. I put off the system and the display no longer comes on. Please come to my aid.

Thanks for your help BDAqua but I'm afraid the situation remains the same even after trying out your suggestion. I have taken a photo of the screen with my phone and this is photo is the best the screen can do. I hope it helps in diagnosing the problem

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet".How can I change ip address?

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet". If this is the root of the problem,how can I change ip address?
Ipad will connect no problem to other networks.

First thing you need I think is to get your iMac connected to the Internet.
Shut down your iMac and you iPad. Then power off your router. Wait 30 seconds and power up the router.
After the router indicates that it is connected to the Internet then start up your iMac and see if it connects. If the iMac connects to the Internet then your iPad should too.
If this power up sequence doesn't work you'll have to dig into the router setup to make sure it is working properly.

How do i connect my iMac Screen to Apple TV?

I have read i can connect my iMac Screen to my Apple TV via Airplay.
How do i do that?
I have Mac OS X Version 10.7.4
I have the OS X Lion ready to download and install, but can't back up my computer (no where to back it up to :/)

Welcome to the Apple Community.
OSX 10.7.4 is Lion
Lion doesn't support AirPlay of the Macs screen to the Apple TV.

I have a Thunderbolt iMac 27" with a Thunderbolt Display attached. I would like to use the iMac and Thunderbolt display in Target Display Mode for my new Thunderbolt MacBook Pro. So far, it seems I can only use the iMac screen itself. How do I do this?

When I press the Command + F2, the iMac screen becomes a secondary for the MacBook Pro, and the Thunderbolt Display becomes the primary screen for the iMac. I was hoping that both screens would become secondaries for the MacBook Pro. Does anyone know how I should proceed? I have tried to connect the Thunderbolt display directly to the MacBook Pro, and the iMac to the Thunderbolt Display via the separate Thunderbolt cable, but there was no difference. And since the MacBook Pro only has the one Thunderbolt port, I'm not sure how to proceed.

Yes, eww, the language definitely states two thunderbolt displays, but I can understand the confusion and was siding with how they could make the mistake to think it would work like they want it to. My appologies for not being clear on that point, but I think you make it clear that the language in the ad says nothing about an imac.
Having said that all the language about TB would suggest that this would be possible. http://www.apple.com/thunderbolt/
High performance on display.
Thunderbolt I/O technology provides native support for the Apple Thunderbolt Display and Mini DisplayPort displays. It also supports DisplayPort, DVI, HDMI, and VGA displays through the use of existing adapters. So you can connect your Apple LED Cinema Display or other display, along with multiple high-speed devices, all from a single port.

How can i see my Imac screen on my macbook pro wireless

How can i see my imac screen on my macbook pro wireless

When posting in Apple Communties/Forums/Message Boards.......It would help us to know which Mac model you have, which OS & version you're using, how much RAM, etc. You can have this info displayed on the bottom of every post by completing your system profile and filling in the information asked for.
CLICKY CLICK-----> Help us to help you on these forums
***This will help in providing you with the proper and/or correct solutions.***

My Apple G5 using operating system 10.6.8 keeps locking up. I get no warning or error message. I do get some intermittent screen distortion. Any ideas as to what could be causing this and how i get rid of this problem? Complete system re - install? N

My mac keeps locking up it s Power mac G5 Intel using 10.6.8 OS.X. I get no warning or error messages it just locks up and the only way to get it to work again is to depress power button and restart. Its random intermittent and incredibly frustrating. I do get some screen distortion from time to time and wondered whether it may be a graphics card issue or whether it could be solved with a complete system re-install and OS upgrade?

According to everymac.com, your Mac came with Tiger, 10.4.x and can't go any higher than Lion, 10.7.x.
It would have come with gray, machine specific disks. Since there's no reason to install 10.4.x first, and then Snow Leopard over that, just purchase a retail copy of Snow Leopard for $20. What you won't get with the retail version of SL is the iLife suite (Garage Band, iDVD, etc.) that were on the original bundled disks, but you can purchase iLife on Amazon pretty cheap, and get newer versions besides.
When you get Snow Leopard, you can boot to the DVD, erase the drive and install everything clean. Hopefully, you issue is only software, and not hardware related.

Any external monitors as good as imac screen for text?

hi all.
this is my first mac. it's a new 21.5inch imac with a 2.7ghz i5 proc running OS X 10.7.3 and 12 Gigs of RAM (8 Gigs from crucial for $50, who can resist?)
i've got it hooked up to an external samsung syncmaster B2330 running in 1920x1080, which is this monitor's native resolution. works fine. it's hooked up via the dvi port on the screen via the mini-displayport to dvi adapter for the mac. i switch this monitor to the vga port when i want to use it as my pc monitor also running at 1920x1080. there is a source button on the monitor. very convenient.
the issue is that they text on this screen when coming from the mac is not as clear was when coming from the pc despite the fact that the vga port provides much less bandwidth than the dvi port the mac uses. i've read that the mac and the pc display text on screen using different methods. my pc uses an nvidia display graphics card. i believe mac use ati based hardware.
there appears to be much more interpolation when displaying text from the mac. perhaps this is a text size issue i'm not sure. either way i read a lot on this monitor and need it to be as good as possible for that purpose.
so the question is, does anyone have experience with an external monitor that is as good as the imac screen for text display. i can't use the thuderbolt display or a cinema display since they don't switch to different ports allowing my to use a single external monitor for two machines. i'm willing to spend up if there is a reason to do so. i'm on these computers a lot. i work from home with some regularity and my job is all about reading.
any help is appreciated.
best, c

I have an dell 24" lcd as 2ed monitor and text look as clear as the imacs screen
but it having a t-nfilm lcd panel vs. the imacs ips panel the colour and contast look worse
but text look as clear
and it look the same when I boot up in win7 using bootcamp

External Monitor with iTunes - iMac screen goes black

I have an iMac with iTunes 7.7/Leopard and an external VGA monitor (I use the standard Apple mini-DVI to VGA converter) then I use the external monitor to watch video from my iTunes library.
All works well - I have my desktop spread over both monitors, I fire up a movie from iTunes, move the video window across to the external monitor and everything is good - I can watch the video on the external monitor whilst continuing to work on my Mac - the iMac screen displays the Mac desktop as normal.
However, if I put the movie into fullscreen mode (view -> fullscreen on the iTunes menu), the external monitor displays the movie in fullscreen mode as it should, however the iMac monitor goes black.
The only way to fix this is to exit fullscreen mode and go back to one of the view options (rg fit to screen).
Any ideas how I can have my external monitor in fullscreen mode and have my desktop back?
Many thanks
SM

I have an iMac with iTunes 7.7/Leopard and an external VGA monitor (I use the standard Apple mini-DVI to VGA converter) then I use the external monitor to watch video from my iTunes library.
All works well - I have my desktop spread over both monitors, I fire up a movie from iTunes, move the video window across to the external monitor and everything is good - I can watch the video on the external monitor whilst continuing to work on my Mac - the iMac screen displays the Mac desktop as normal.
However, if I put the movie into fullscreen mode (view -> fullscreen on the iTunes menu), the external monitor displays the movie in fullscreen mode as it should, however the iMac monitor goes black.
The only way to fix this is to exit fullscreen mode and go back to one of the view options (rg fit to screen).
Any ideas how I can have my external monitor in fullscreen mode and have my desktop back?
Many thanks
SM

How to i fix a flicker on my iMac screen?

My imac screen has just started flickering. I have researched it and it already a promblem with other mac's. How is this problem fixed? Thanks

You could reset the pram and smc to see if that helps. I would however suggest if the machine is within waranty you contact your local Apple store as this sounds like a hardware fault to be honest.

How to keep iMac screen black while keeping secondary monitor running for visual experiments in Matlab

Hi,
I'm trying to run a visual experiment using PsychToolbox in Matlab.
I've attached a secondary monitor to my iMac for this purpose and I'm having difficulties trying to
'black out' the iMac screen.
I need the secondary monitor to run at a refresh rate of 120Hz and at linearised luminance (did this for my secondary monitor),
so I can't really use my iMac screen. However, i need my iMac screen to be darken out because I'm doing a vision experiment.
I tried dimming my iMac screen but it doesn't go completely dark. I tried Ctrl+Shift+Eject (or was it Command) but it will darken both
monitors. I also tried mirroring, but it doesn't seem to work too.
I'm really stuck and any ideas will be greatly appreciated!
shui
NB:I'm using OS X Version 10.8.3.

I do not know the details of your experiment, but creating a black monitor is not difficult. For example a completely black page, e.g. in Power Point, set to fill the screen?
The advantage of doing this with PP is that you can move in to or out of the black page with just the space bar. You can set up your monitors so PP is displayed on just one monitor.

24" iMac screen mist behind glass

For a couple of months now my 24" iMac screen keep misting up behind the glass around 30 mins after booting - anyone know a resolution for this? Will Apple replace the screen even though i've had it around 4/5 years now?

scottycross wrote:
For a couple of months now my 24" iMac screen keep misting up behind the glass around 30 mins after booting - anyone know a resolution for this?
It is common to get condensation between the display and front glass panel, if it is humidity and cool in your office or home.
A few things that you might try, are
1. Reduce the level humidity with a dehumidifier.
2. Leave the iMac on longer until the condensation dissipates.
3. Remove the front panel yourself and clean between the display and glass.
Will Apple replace the screen even though i've had it around 4/5 years now?
No, but if you contact your local Apple Store or AASP you can schedule an appointment to have it dried and cleaned.

IMac Screen Distortion

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