Display issue-2006 Intel iMac

Hi all. This just started today and it seems to only happen (twice now) after awaking from sleep mode and power-up. After waking from sleep, I can't use any keyboard shortcuts to restart my system, thus requiring me to "hard" boot the machine. Then it happens again, but I'm able to type and use the mouse (startup screen pic below). When I restart the computer, the issue goes away. Also, I've noticed some fluctuations with my screen brightness, rather rapid ones, that's been happening for a month or more. Subtle, but enough to notice and worry me about my screen failing. Thanks for any help.
after sleep mode:
after "hard" boot:
Thanks, Will

Thanks Duane. I called AppleCare today and we did a couple things like unplugging the power and all other peripherals for >15 seconds to reset something, then we reset the PRAM and ran a repair disk with the OS X install disk 1. This didn't solve the issue, so I have to take it to an authorized repair facility since the nearest AppleStore is 7 hours away! Thanks for your response.

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2006 Intel iMac with new Mac Mini?

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http://support.apple.com/kb/ht3924

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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.
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Early 2006 Intel iMac, does not boot, randomly crashes

Hi everyone,
So, I bought a used 2006 Core Duo Intel White iMac off of a friend earlier last year. The iMac has been running like a champ, I installed Snow Leopard on top of Leopard and it hasn't given me any problems until much recently.
I installed Bootcamp, secondary to the desire to play a little Team Fortress 2 and during the Bootcamp installation it actually randomly crashed. Weird, it's never actually done that, but since that time it would crash and would not power up for anywhere from half an hour to half a day. At first, it would only crash during Windows Vista, but now I found it crashing during OSX with the same problems powering up.
During the crashes, the computer will not respond to mashing on the power button, and sometimes, I will hear the high-pitched whine of the boot and the light in the bottom right of the iMac would go on and then crash at the gray screen. At other times, it will boot right into OSX and then crash with the same problems.
*Things I have tried:* Resetting the PRAM, resetting the PMC, deleting Windows Vista and removing the Bootcamp partition, Disk Utility on the few times the machine booted with a clean bill of health.
Results: Resetting the PMC seems to help rebooting, but does not prevent other crashes. Neither the PRAM reset or removing Windows Vista has helped with the problem.
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Impressions: I strongly believe it to be a power supply/motherboard issue. I ran RAM tests and the RAM itself seems to not return any errors. If these are in fact the repairs I need, then it's beyond what I can actually repair on the machine, so to the Apple Store it will go.
I am however looking for any input into other people's problems like mine or any other thing I can do to test/bench the system (when it doesn't crash). I dig the machine and I thought I got a good deal, I am looking for any other insight you may provide. Also, if anyone has a good place to buy parts to test/fix Intel iMacs I am handy inside a computer, tinkered with PCs throughout my life. Thank you in advance!
Message was edited by: StrangePowers

Strange,
It’s beginning to look as though we have similar iMac characteristics. Here’s a couple of other things I did that you might try. Each of these seemed to improve the stability of my Mac.
1. One of the differences between a normal boot and a safe boot has to do with what fonts are loaded. Since my system seemed to run fine in “Safe Mode” it was suggested to me to run Font Book and verify all fonts. I did that and it found numerous (90+) minor font problems and 1 major problem. I deleted all fonts that showed any problem at all. I didn’t expect fonts to be a significant source of problems, but after doing this step and #2 and #3 below, my Mac began to behave better
2. Over time a lot of junk builds up on your Mac – caches, languages that are loaded with applications but not needed, logs, etc., etc. There are a lot of programs that will do clean up of these files. I really don’t know which ones are best, but I came across one called “CleanMyMac” and decided to buy and download it. When I ran it, it found a ton of stuff during its Scan which I then Removed.
3. Reset the SMC
4. Here’s an interesting one. I came across many comments about the importance of cleaning out the air in/out ports on your computer. I have a small compressor that I used to blow through the ports on my Mac. A not-insignificant cloud of dust came out of my Mac when I did that. Any dust sitting on components will act as insulation, retard heat dissipation, and cause those components to run hotter. After doing this, I swear, iStat began showing temps 10 deg F cooler than before.
5. I downloaded SMCFanControl. After a little trial and error, I set the minimum speeds as follows: Optical Drive fan at 1000rpm, Hard Drive fan at 1400rpm, and CPU fan at 1400rpm. This brought temps down another 10 deg. F at least.
I haven’t had a crash or hang of my system since.
Here’s the main temperature readings I’m seeing now:
CPU A: 91 deg. F (33 deg. C)
Graphics Processor: 93 deg. F (34 deg. C)
Hard Drive: 96 deg. F (36 deg. C)
Memory Controller: 93 deg. F (34 deg C)

Does anyone else have display issues with Intel X3100 graphics and OS X Lion?

I took the screenshot below to demonstrate one issue I have had with graphics since upgrading to OS X Lion. I use a Late 2007 MacBook with 2.0GHz Core 2 Duo and the Intel X3100 graphics chipset. I have 4GB RAM. Had to reboot to get this to correct itself. The problem is the menubar (obvious) and the desktop image is missing, replaced by the grey.
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So here we go:
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Any help?

Use the Command key, not the Control key to reset PRAM (Cmd-Opt-P-R).
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Hello everyone,
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Adium 0.89.1
FoireFox 1.5.0.8
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There should be no reason I'm getting these lags with just two web browsers and a chat client open.
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Hello Matthew
Are you running any maintenance scripts on a regular basis?
http://www.thexlab.com/faqs/maintscripts.html
I would manually run this script from The X Lab, and my load times would improve greatly. The problem was, I would forget to run them untill I noticed web pages loading slow or iTunes and iPhoto taking for ever. It wasn't untill someone here in discussions suggested Anacron that I saw the light. WOW what a difference Anacron has been making in my overall system speed. My iMac has not been shutdown for 11days 5hrs 34mins (sleep or use only) and opening new App's, switching App's and web pages load as fast or faster than after a fresh start up. If your system is operating properly and you are having only what seems to be a slow or sluggish issue Anacron will make a difference.
http://members.cox.net/18james/anacron-tiger.html
Dennis
17" iMac Intel Core Duo 1.5GB Ram Mac OS X (10.4.8) Maxtor 300GB FireWire 2G Nano

Strange issue with Intel iMac

We have no issues accessing sites from most computers at our workplace. However on the iMacs (Intel based) some sites will not load. I get the error message:
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Again all other computers on the network can access them fine....and this computer can access other sites fine....
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As nerowolfe said, you might check your hosts file. Open your finder window and then Go>Go to Folder and type in "/etc" (without the quotes) and you should be able to browse to the hosts file. Make sure it doesn't have any extra hosts (could have happened if the iMacs were installed using a remote install or some sort of cloning system).
Following is from my /etc/hosts file and may not reflect yours, but you're going to be looking for things with the exchangebankonline.com in them. May not solve your problem but it's a place to start. Let us know if this wasn't the problem and we'll go from there.
Cheers.
/etc/hosts
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost
Message was edited by: jb.tamug99

Snow Leopard runs super slow on early 2006 (Intel) iMac

Hi. I need some advice please. I have an early 2006 iMac 20" that was running slow and I wanted to upgrade OS and main applications so I bought the SL box set. I backed up my data on a USB HDD and did a clean install, but now the system runs incredibly slowly. Genius at the Apple store ran diagnostics all day and found no problems with the HW and recommended I added another 1GB of RAM to existing 1GB. I did and system is still incredibly slow. I get the beach ball all the time and sometimes the system is completely unresponsive. Anyone else have performance issues with SL on this model iMac?
Message was edited by: Leibochips

See:
Mac Maintenance Quick Assist,
Mac OS X speed FAQ,
Speeding up Macs,
Macintosh OS X Routine Maintenance
Essential Mac Maintenance: Get set up,
Essential Mac Maintenance: Rev up your routines,
Maintaining OS X, and
Myths of required versus not required maintenance for Mac OS X for possible fixes.

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I have a 17" 1.83 Ghz dual core intel based imac. very recently, after upgrading to version 10.5.5, when I put my computer to sleep it immediately wakes itself up, and it will not go to sleep by itself. the screen will dim like it usually does before sleeping, but full sleep will never occur.
I have tried rebooting, as well as resetting the SMC. I have tried sleeping with no running applications. I have set a hot corner to sleep the display, and that works, but I cannot get thee computer to sleep. its pretty frustrating. any ideas?

whoops found the problem. My wireless USB mouse was waking it up for some reason. I guess Ill just unplug it when I put my comp to sleep from now on.

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Has anyone else had a similar problem and/or does anyone have a solution other than reinstalling 10.4.4 and upgrading to 10.4.10 again?
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Mizraith,
I have the same setup as you (the WRT300N router & a macbook pro (sept 2007). I have been investigating these issues for a while now. First, to be quiet honest, this router is a crappy piece of hardware. Simply google the product name along with interesting keywords such as 'vanish' 'problem' 'issue', and make your own conclusion. Not to mention that the product has had at least 3 hardware revisions: it pretty much says it all.
Here are my takes on this, I have had 2 different problems:
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2) Second problem, the signals gets weak and the connection just freezes. Not sure it is macos specific, but the fact is that with macos 10.4.10, when it happened, simply setting aiport off -> on used to be OK. Since I upgraded to macos 10.4.11, the system will then appear to be connected to the AP with a good signal, but the NIC will be assigned a self-assigned ip address (169.x). This also happend after putting the system in sleep. It seams to happen more often on battery mode on my macbook. Manually rerunning the dhcp client does not help. Solution? You guess it, the r.e.b.o.o.t.
The router may be an unstable product, but there are some obvious regressions in the wifi support of macos 10.4.11, at least, in error handling. Here again, a simple google search for '10.4.11 wifi' with 'problem' 'issue' should convince you.
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Here's the [cross-posting in the 10.6 forum|http://discussions.apple.com/message.jspa?messageID=11032024].

Snow Leopard for Early Intel iMac 2006 - Worth it?

I was curious....
I wonder if anyone could tell me if going to Snow Leopard from Tiger on a mid 2006 Intel iMac would be worth the money and trouble. The upgrades on some of my apps are tempting, but would there be a significant difference in performance?
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"I with the (mad) hatter. I prefer be as sure as I can that I don't bring any existing problems forward to a new system--especially Sno (i.e., Sno seems to generate some exceptionally hard problems to solve)."
Hi Ghost:
That's what good backups (clones) are for. Also if you are unsure of your 10.5 integrity, an archive
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Intel imac startup hangs on "None of your preferred networks are available" dialogue

Hi everyone
Running a 2006 Intel iMac, 10.6.8
I have recently run into the "grey screen at start up" issue that is documented here: http://support.apple.com/kb/TS2570
I ran every routine in this article, up to and including a disk repair off the OSX install disk and this step seems to have fixed the grey screen problem. However there is still one major problem unsolved that the article does not cover.
Boot up runs normally and allows me to get into my account (there are 4 accounts on the machine). However i am then getting a dialogue screen "None of your preferred networks are available" with a list of local wireless networks (mine and neighbours).
I have had this dialogue screen at times in the past and have simply been able to click cancel to bypass it. However the system is now hanging on this dialogue. If I try to click Cancel or Other the dialogue box changes position and the remainder of the desktop darkens, as if an action is taking place, but nothing happens beyond that.
I have seen many other discussion posts on the "Preferred Networks" dialogue, but only one which describes the system actually hanging on this dialogue - that was in 2007 and the user was going to reformat the HD - he/she didn't post the outcome.
This iMac is normally connected to the router by Ethernet cable. I have tried booting with and without the cable attached. I have tried booting in safe mode. Neither of these have had any effect.
Can anyone recommend any other fixes I can try? Or is a complete reformat the only option?
Thanks in advance for any help, hugely appreciated.

Thanks Roam - however I think my situation is different.
In the case you refer to, the user was able to cancel the "preferred networks" dialogue and then proceed normally to system settings to apply a fix to stop this dialogue reappearing in future.
My problem is that the Mac *completely freezes* on this dialogue box - clicking Cancel simply does not work, I can't access any other menus or applications.
I forgot to add that the spinning progress wheel appears intermittently on the "preferred networks" dialogue box, suggesting that some sort of routine is trying to run, but never successfully.
Thanks for your reply nevertheless, really appreciated.
Anyone else out there with any experience of this?!
Thanks in advance

Display issue-2006 Intel iMac

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