Weird display issues on 24" iMac (old Intel model)

Hi, I just bought a 24" Intel iMac (used) and it performs great...except I'm wondering if the display is on the verge of going dead because after extensive use the display will get really hot and then weird things will happen like a split moment of discoloration (saw it once on the "word of the day" screensaver), or I might get this weird sort of "fuzzy" black line at parts of the screen or sometimes when I minimize a window or click on an icon in the dock (I have the magnification function set) parts of it may "stick" to the screen. I also tried playing Nexuiz and the game would freeze and/or just have moments where it looks completely weird or excessive screen flicker. When it looked that way I took a screenshot just to see if it would capture it, but when I look at the screenshot everything looks right so I don't think it's the graphics card. Mind you I've never had a problem playing that game on my old eMac. Does anyone have any suggestions as to what may fix this problem? Has anyone else experienced this?

I have been having the following trouble with my 2 y/o, 24" iMac: 1. the screen freezes/locks up (for a better description) wherein the entire screen goes blank. It takes a power off/on reboot to get it back. 2. Screen burn (or as Apple calls it, "persistence" wherein with a solid color background, you can still see pages that were previously opened as well as shadows of the icons in the dock. I've had two calls to Tech Support and have taken the iMac to the Genius Bar three times. Nothing was found the first time. The hard drive was replace the second time, and the LCD screen was replace the third time. The lock up has not occurred since the screen was replaced, but I still can see persistence. I can actually read the date on the calendar icon if I move the dock from the bottom position to the left or right of the screen. Part of the persistence has, in fact, gone away, that is, a big, dark area from the bottom to the top of the screen on the left half. I'm about to call Tech Support and suggest that they have done everything they can and carrying this computer back and forth to the Apple store is getting old. Here is an article on "persistence" that was sent by an Apple technician. Perhaps, it will help you.
http://support.apple.com/kb/HT2807?viewlocale=en_US

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Weird Display Issue...

Hey, my MacBook Pro has been working perfectly except for an issue in the display. On occasion, I will be using it and then the screen will randomly go black as if it was going to sleep but if I move the mouse it doesn't come back. I have to press down on both the left and right spaces below the keyboard for it to come back on but sometimes if flickers back off so I have to do it a few times (which I know probably isn't good for the computer but at the same time if I'm working on something I'd really hate to stop...).
I don't know if this is due to a battery issue or what but I'm really concerned about it because I was unable to purchase a protection plan for my computer (due to lack of funds) and I don't want what little support I have already on this to run out. Does anyone know how I can resolve this? I would greatly appreciate it.
MacBook Pro Mac OS X (10.4.7)

> What do you mean exactly by mains? I almost always run my MBP with the charger in. Would that cause any problems?
Mains = main household power supply, via the Magsafe adapter. i.e. a 110-240ACvolts -> 10.8DCvolts constant supply. It's fine to use it with the MagSafe plugged in most of the time, you should however always use/cycle the battery at least once a week and re-calibrate it every now and then for best performance.
With most stores you can make an appointment online first. Use this URL, enter State, select store, then choose your date/time slot. http://www.apple.com/retail/geniusbar/

Weird Display issue MacBook Pro 2010 15"

Hey
i recently turned my MacBook pro on and after about ten minutes my display started to flicker some coloured lines until settling on this flickering:
I restarted, tried to see if any updates where avaiable neither of which helped,
I took a screen shot and emailed it to my partners Laptop and the lines wern't there, so i dont think it is a software problem.
i then shut down my laptop for the night and turned it on the next day and it was fine, about 40 minutes on it and it started flashing again but didnt go as bad as the previous day, It hasnt done it since but im slightly concerned as you can imagine.
Tech Tool Deluxe reports no problems at all.
I do have apple care but im out the country at the moment so not much i can do about it if things get worse, i will be taking it to get checked over when i return home in a month!
Has anyone had similar issues, or got any ideas as to what caused this?
Specs:
MacBook Pro 2010 I5 2.53Ghz 15"
8gb Crucial Memory Ram
Stock 500Gb 7200RPM Drive
Western Digital Scorpio Blue 640gb 5000RPM in Optibay
NVIDIA GeForce GT 330M 256 MB graphics and built in card

I will have to when i get home in a month,
it hasn't done it for a while now so hopefully i can last out the month with out any serious problems, my main concern is the graphics going completly and me not being able to use my laptop at all!

Display issues T540p, Windows 8.1, Intel, Citrix????

Hi Everybody
We have numerous users who has the T540p laptop as their mobile office. When they are in-house they use the docking station that has an external monitor connected.
However, when they start a citrix application, the application Is all screwed up. See posted pic. The application window freezes and the mouse curser bounces around the edge!
Link to picture
The application also shows the citrix desktop, as if the application window was moved off screen.
I’ve tried all the know solutions from Citrix, that concerns multi-monitor setup – no luck.
I have narrowed it down to Windows 8.1 with or without update 1, and the newest Intel driver for the HD4600 graphics card.
The problem does not show with Windows 7 or Windows 8 with the same version of intel drivers.
All tests have been done on clean installations of windows with “Intel Iris And HD Graphics Driver” version 15.33.22.3621 (10.18.10.3621)
Have anyone else experienced this issue.
Michael
Moderator note; picture(s) converted to link(s) About Posting Pictures In The Forums

Michael,
I have the same problem to but on a Windows 7 machine, with two monitors.
While launching Citrix Fulld desktop(FD) the window spans across two monitors every time it is launched.
Once the title bar is double clicked , FD settles on the secondary monitor
User launches a published app,on the primary monitor.
Then at random, FD spans across two monitors (user is unable to see the title bar to drag and rest)
Now has to Shift+F2 and then do the adjustments again. ( this happens quite randomly)
Could you tell me what was your fix to see if this can be of any help?

Repeated iMac Problems, Display Issues now Kernel Panics

I’m lost on what’s wrong with my 2008 iMac and I think I just have to bring it back into Apple for a third time to have it repaired. But something is obviously not working that is causing these issues.
About a month ago, my computer began showing heavy pixilation, flickering images and the on-screen graphics. The computer appeared to keep working in the background from what I could tell so I came to conclusion that it must be the graphics card that’s failing and I’ll need to have it looked at.
My 2008 iMac was custom-built by Apple with the Nvidia GeForce 8800GS that was offered as an upgrade option. There have been several posts on the display and graphics discussion board about that graphics card along with other postings other places about the problems the Nvidia GeForce 8-series had.
The display problems I mention above would not happen immediately, it would happen as the computer warmed up and was used for 3-5 minutes.
Anyway I brought my computer into Apple explained to them what I believed was the problem and the Apple Store technician agreed with me. Because I did not purchase AppleCare, it cost me $400 and a week without my iMac to have that card replaced.
I got the computer back two weeks ago and everything seemed fine. It was working as it always had. I even was running SMC Fan Control in order to keep the computer as cool as I could (the Nvidia problem was related to overheating).
But this morning, this is what I woke up to:
http://img97.imageshack.us/img97/7436/photoijr.jpg
The computer now has a semi-permanent pixilation when it starts up (as suppose to the pixilation 3-5 minutes into use). But more worrisome now is I cannot start up the computer without it going into a kernel panic. I tried resetting the PRAM, I tried starting in safe mode. The only thing I haven’t tried yet is booting from an external HD which I will try this evening (to hopefully isolate it if it’s hardware or a software problem).
The Apple Hardware Test has been unhelpful. When it originally failed three weeks ago, the test showed nothing and this morning when I ran it (permanent pixilation and all), it showed nothing. I feel like if it was a software issue the pixilation would have disappeared during the hardware test because that’s not an OS-X based program.
Here are my specs on this computer:
2008 iMac 24" 2.8ghz Intel Core Duo, 4 gigs of RAM (Crucial Purchased, I have original sticks somewhere), 1 TB HD, Nvidia GeForce 8800GS.

Hi, just to update you, I came home today and did a few things that didn't seem to solve my Mac's problems:
- I booted up from my firewire "safe" drive that I keep a copy os x on to see if I had a corrupted hard drive or something. It booted into the kernel panic I described above.
- I also swapped out the crucial RAM for Apple's factory RAM. It also booted into the Kernel Panic.
In both incidents, the display issues didn't go away. Now instead of pixelization i have vertical bars running in a pattern across my screen.
I'm currently trying to boot onto the OS X CD at this point to see if I could do a reinstall. It's taking quite awhile to boot into that.
With that in mind, I think we're still having graphics card issues or more seriously some logic board problem.

IMac display issues / Trying to output at 1920x1080 through VGA

I'm having some external display issues with my 2007 Intel Core 2 Duo iMac (2.4ghz). Using the mini-DVI to VGA adapter, I plugged the VGA cable into a Samsung LCD TV (PC mode). When I originally had everything set up, I was using the TV as an extended display, with a display setting of 1920x1080.
However, I had to get a 25 foot VGA extension cable, and now my maximum resolution is 1600x1200. Does anyone know why extending the VGA cable would do this?

There could be any number of factors involved, but cheap cabling, or that your Mac does not have enough power to push the high quality resolution signal that distance first come to mind.
Dah•veed

Imac 27" Intel Core 7 CPU. Screen goes black and will not respond except with a push of power button. Second monitor connected via displayport continues to display fine. Apply Store did full hardware scan and all is fine. Did clean wipe from Mavrick back

Imac 27" Intel Core7 CPU 16 Gig RAM. Screen goes black and will not respond except with a push of power button. Second monitor connected via displayport continues to display fine. Apply Store did full hardware diagnostic and all is fine. Did clean wipe from Mavrick back to Mountain Lion but problem remains. Apple Store can do no more.

I did some more digging, it appears to be a backlight problem only. I can see the screen very dimly if I use a bright flashlight in a very dark room. It also seems to run ok if the brightness is turned down a LOT.
So I'm thinking this is a LED driver board issue or the display itself. I'll open it up and check the connection between the two and see if I can get any more clues. At least I can use it somewhat now by dimming the display significantly...

Will Mountain Lion work on my 4 year old iMac with Intel Core 2 Duo Processor Speed: 2.66 GHz

Will Mountain Lion work on my 4 year old iMac with Intel Core 2 Duo processor and a 2.66 gHz.
Really do not want to load it and find there are issues.
Oh I really not a big tech guy I just want everything to work well.
And I'm just about to purchase a Mac Book Pro as well.
Any thoughts and comments would be appreciated
Cheers

I also have a 4 year old iMac 24". it is the 3.06 GHz Core 2 Duo. I have been running Mountain Lion since it was released, and before that Lion. Runs great. Over the last month I have noticed some slow data transfers from a USB harddrive. But not enough to do any research. I use a USB harddrive for my Time Machine backup and notice no problems or slow transfers while the Time Machine backup runs. My iTunes has its nedia files on a USB harddrive and is used to watch videos, play music and share photos on the AppleTV. I also use Aperture on the iMac to store and manage 20,000 photos.
I have 6 GB of ram, 4GB and 2GB memory sticks. I know it is best to have identical ram sticks but my iMac model cannot run 8GB of ram and I feel 6GB is better than 4GB.
Mountain Lion is a great OS and I am glad I upgraded. It works great with the AppleTV (no airplay but iTunes on the iMac serves up all our music, photos and videos), iPhone, and iPod Touch. Also with my wifes brand new Macbook Pro. All the devices including the iMac can share data on iCloud.

How can i use my old iMac as a extended desktop display for my new iMac?

I recently purchased a 21.5 in iMac and wanted to use my old iMac as a extended desktop. My new iMac has thunderbolt and USB 3.0 connections while my old iMac has firewire (400 and 800), USB 2.0 and mini-DVI. Is this posible?

Welcome to Apple Support Communities
If your iMac has got Mini-DVI, you have a 17, 20 or 24-inch iMac that doesn't support Target Display. Late 2009 and Mid 2010 27-inch iMacs, and iMacs with Thunderbolt can be used as external displays. Read > http://support.apple.com/kb/PH11302?viewlocale=en_US&locale=en_US
If your old iMac doesn't support Target Display mode, you can use ScreenRecycler to use your old iMac as an extended display for the new iMac. The only thing you need is that both Macs are connected to the same network

User Contributed Tips in Intel-based iMac Your Intel-based iMac Display

*The following User Contributed Tips are located in the Intel-based iMac > Your Intel-based iMac Display forum:*
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
*The following related tips are located in other areas of Apple Discussions:*
See also User Tips Library

My 20" 2.16 GHz Intel Core 2 Duo had become almost useless due to freezes and crashes- with NO crash reports in the logs.
They were often preceeded by video glitches, so I assumed it was a bad video card- unfortunately soldered to mother board.
Apparently, from forum postings, this is not an uncommon problem. The computer would run longer if the day was cooler, but rarely more than 10 minutes, so I suspected it was aggravated by heat.
Then I found this post from Bodomann on an Apple Support forum:
"Following up on my previous posting regarding my son's late model 2006 iMac that required a $900 logic board replacement:
Turns out the problem is apparently related to a bad CPU temp sensor. I installed 'iMac Fan Control' (Google it) which reported the CPU temp always at 32 degrees Fahrenheit (obviously incorrect). The same software allowed me to adjust the CPU fan manually. After multiple trials I set the CPU speed to 2800RPM after which the system would run forever - never freezing with the dreaded grey box 'reboot me' screen. I tried several times reverting the software to default speeds and the system would always crash within 10 minutes. "
I downloaded free Fan Control 1.2 for Imac from Derman Enterprises (they have an Intel iMac and a Mac Book/Pro version). It installs as a system preferences control panel. I cranked up all three fan speeds. The fans sped up noticeably. Horizontal lines have gone from screen (so far), no color artifacts and no crashes yet. I may have a real computer back! Hope Apple checks this out-
The control panel also gives the temps sensors are reporting at the CPU, hard drive and DVD drive. The CPU sensor reports the CPU temp as 32 degrees F- which is clearly wrong, unless Apple has been installing little refrigerators inside.
So thanks to Bodomann for posting- Hats off and three cheers to Derman and Cristoph for source code.
http://www.derman.com/iMac-Fan-Control
http://www.lobotomo.com/products/FanControl/index.html

My old Intel-Based iMac is no longer recognizing USB wired input devices; it only recognizes Bluetooth. What happened?

My friend's old Intel-Based iMac is no longer recognizing USB-wired input devices (Kensington TrackBall, Logitech Mouse) plugged into any USB slot at the back of the computer.
They were working before and for many years.
All of a sudden, A pop up window came up. IT said no Bluetooth mice could be found. We don't know what set off that window to pop up and look for a WL mouse. It never has before in the 5 or more years my friend has been using this computer.
I supplied a wireless Apple mouse and his is back running again.
But want to know why his USB-input devices (Except his keyboard) are not being recognized. He would prefer to use his Trackpad (Wired), but can't find anything in SYstem PReferences to allow that. The computer only seems to want a Bluetooth input device.
Anyone have an idea what happened and if this can be reversed?
I think he is still running Mac OS X 10.5.8.

Hi Carol, lets try this...
reset FW bus, same goes for USB reset...
Reset the Firewire bus
If your Firewire or USB isn't recognizing any device. A solution which has worked for some whose hard drive became invisible in 10.4 was simply to follow these four steps to reset the Firewire/USB bus:
1. Shut the machine down.
2. UNPLUG the power lead to the computer and any firewire/USB drive/devices.
3. leave it for 10 minutes.
4. Connect back up and reboot.
http://www.macmaps.com/firewirebug2.html

I'm trying to set up a dual monitor for my new iMac. I'm using a second display I used with my old G5. My iMac recognizes the second monitor but the monitor won't turn on. Power button doesn't do anything on the monitor itself.

I'm trying to set up a dual monitor for my new iMac. I'm using a second display I used with my old G5. My iMac recognizes the second monitor but the monitor won't turn on. Power button doesn't do anything on the monitor itself.

If it won't turn on then the monitor is dead (power supply?, video circuits?). Not worth repairing.
If you have a new iMac then it has thunderbolt. So exactly what is that monitor you are trying to connect? For TB you can connect a mini-displayport monitor. Probably (not 100% sure with TB) can use dvi or vga too if you have the appropriate adapter.

IMac 17" Intel CD: display doesn't work

ciao,
today when I switched my iMac on the display remained dim, just like if it was off, while everything else worked OK.
so the display was black like it was off, but then I noticed that if I looked very carefully I could see the login box and I managed to log-in.
to cut the story short: the iMac is working OK but the screen is so dim it looks like it is off.
what can I do? Apple support chat told me to try to reboot the iMac pressing Command-Option-P-R, and that this doesn't work it is an HW problem: any other suggestion/reccomendation?
thank you very much
andrea
ca.pattacini[at]gmail.com
iMac 17" Intel Mac OS X (10.4.6) Display not working...
iMac 17" Intel Mac OS X (10.4.6) Display not working...

Try the F14 & F15 buttons. Those control the brightness of the screen. That should be able to solve that problem. I had that thing before until I messed with the keyboard and "discovered" it.

Weird OSX display issues after going to webpage, only thing that fixes is Perm repair

I have a bizarre issue that i'd love some input on. Late 2009 iMac, Mountain Lion (then Mavericks).
I use Firefox to utilize a real estate website (Fusion MLS) for several months now. A couple of days ago, after i would log into the website and use it for a little bit, the rest of my tabs, apps, windows, would all start appearing as black boxes, or have glitched out (generally black) screen display issues. To be clear, other tabs inside the browser would be black, or partially black, and also the right half of my taskbar icons would be black silhouettes of the icon. BUT, the Fusion MLS website would still work fine. Closing the page, etc, would not fix the problem, it would be stuck like that no matter what i closed or opened, computer would function fine except for the display, but i couldnt see hardly any of the apps so I'd have to shutdown, but a simple reboot didnt fix it. After an hour of troubleshooting, I started off in Mountain Lion when the problem appeared, and in the process of troubleshooting I decided to upgrade to Mavericks to see if that would fix the problem, it didnt. Ultimately I discovered the only thing that fixes the problem is to boot into Safe Mode and Repair Permissions, then i can come back in as normal and everything is normal again (a standard reboot doesnt fix it, when logging back into OSX it would still have black silhouettes and all the app windows would be black).
So after the above I decided to just start using a different browser to go to this Fusion MLS website (Safari). Which worked fine for a day, but now when i go to the website, i have no problems, but when i put the computer to sleep, and bring it back, the windows are blacked out and icons silhouetted. So back to safe mode, repair perms, and then it works again. When i do the repair perms, there are usually no verbose things that it says it repairs, sometimes it says something about the PrinterList being 0 instead of 80, but thats it.
Any help or insight would be greatly appreciated, I'm completely dumbfounded....

Now regular Repair Perms doesnt fix it, it has to be Diskwarriors Repair Perms. Also it happens anytime the computer is put to sleep for a length of time and brought back, regardless of whether the Fusion MLS website was gone to.

I used migration assistant and my ethernet cable to move data and apps from my 5-yr old Intel-based iMac to my brand new Intel-based iMac running OS Lion. The old machine was running OS 10.5.8. Not all my files transferred (or I can't find them). Help

I used migration assistant and my ethernet cable to move data and apps from my 5-yr old Intel-based iMac to my brand new Intel-based iMac running OS Lion. The old machine was running OS 10.5.8. Not all my files transferred (or I can't find them). I've seen recommendations to select the old computer in System Preferences, but that didn't work. Help. Thanks!

IMO, wrong choice. Start over, using a FireWire cable and following the steps in Pondini's Setup New Mac guide.

Weird display issues on 24" iMac (old Intel model)

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