Intel iMac won't start! 17"

have the intel imac for 3 months now, no problems besiedes freezing 2-3 times in past few weeks or so.
Today, it froze again, only had mail & quicksilver ON, so I powered off.
Since then it won't start...
everytime it stucks with 'the ambient light' (white/sleep light static), the screen has nothing on it, tried pressing all recommeded key combinations, C, or option and many more,
nothing worked,
removed the 1 gb OWC RAM i had, still the same problem, won't start. Then inserted the install disc 1, that won't boot either!! same light & blank screen!
have powered down 4-5 times, restarted, nothing!!!
unfortunately I haven't recently backed up the hard disk, i know if i send it in, then its all gone!
Any ideas, suggestions...anything!!
HELP
SM
1.83 Intel Core Duo 17" inch - 512 RAM Mac OS X (10.4.6)

This problem occurred with my first iMac 20", albeit while I was using iDVD. When you turn on your computer, does it make a sound? Mine almost sounded like it was "groaning," you could hear the hard drive spinning and the processor starting up, but the screen stayed black. Tried all the different combinations also, and then got on the phone with AppleCare. Apple replaced my iMac as I had only had it a little over a week, citing a "hardware problem."
For you Apple probably won't replace the iMac (they told me they only do it within 14 days of purchase), but I would suggest you contact your local Apple Store/Apple Center/Apple Authorized Service Provider for reapir options if the symptoms you have are the same as mine.

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Intel iMac won't start - HELP!

My iMac won't start this morning. I get the white screen with the grey apple,
and the swirling progress thing, then after a few seconds I can hear
the sound you hear when the system shuts down. like a soft switch
going off, then it just continues swirling, still with the white
screen and grey apple, then it restarts by itself. Then we go through
the same routine. Tried booting up by holding C with the Leopard disc inside but nothing happens.I have just reinstalled Leopard as Snow Leopard left too many printers and programs lifeless, so I did an erase and install a few days ago. Since then I have used the Mac fine, switched down normally last night, but this morning it doesn't want to play.
Any thoughts?
Thanks in anticipation
Chris
Message was edited by: ChrisRR

Have you reset PRAM and SMC?
Do this first
http://support.apple.com/kb/HT1379
and then do this, if the PRAM does not help
http://support.apple.com/kb/HT1543
The second one is basically disconnecting your iMac from power (and all cables), then reconnecting following a precise procedure.
If that does not help, I would restart with the Snow Leopard installation disc (insert disc and start up with the C key held down). You probably did an installation of Snow Leopard over your existing Leopard system the first time. This time, erase it completely first, then install Snow Leopard. I assume you backed up your data already.
When you get to the Installer screen (after selecting language), go up to the menu bar. Under Utilities, select to run Disk Utility. In the sidebar, select the internal DRIVE, not the volume indented under the drive. Go to the Erase tab. Name the volume +Macintosh HD+ and set the format to +Mac OS Extended (Journaled)+. Erase the drive. Since you have the drive selected in the sidebar (not the volume), it will also re-partition the drive.
It should take less than on minute to complete the process. Quit Disk Utility to go back to Installer. Run the standard installation onto the blank internal drive. Hopefully, a fresh Snow Leopard install on a reformatted/re-partitioned drive will work better for you.

Intel iMac won't start up after update of OS... anyone w/similar prob?

Help! I recently did installs through "software update" and now my iMac won't go beyond the flat blue screen. To be more specific, it starts up, takes a long time on the grey screen with the rotating pinned circle and apple logo, then stays on the flat blue screen forever. I can move the mouse but nothing else happens.
I'm trying to remember what the software update installed... I think it was the most recent security update, iDVD, iMovie, iPhoto and Quicktime update.
I'd appreciate any advice or experiences you can offer. Thanks in advance.
iMac Intel 20" 2ghz Mac OS X (10.4.6)

Hi, hajime7. Welcome to the Discussions.
1. As a general check, run the procedure specified in my "Resolving Disk, Permission, and Cache Corruption" FAQ. Perform the steps therein in the order specified.
2. An errant Startup or Login Item maybe the cause. My "Troubleshooting Startup and Login Items" FAQ can help you pin that down if such an item is causing the problem.
FYI: Before installing software updates, you may wish to consider the advice in my "Installing Software Updates" FAQ. Taking the steps therein before installing an update often helps avert problems.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

Intel Imac Won't Start Up

Hello all, this is my first post here. Any help gratefully received!
My Intel Core Duo Imac (bought march 2006) is having some recurring problems with starting up (and sometimes awaking from sleep). It's a 17" Rev A, 1.83GHZ, 160GB, with an extra 512mb of Ram added by me, running OSX 10.4.8.
It has worked without problems for nearly a year but recently it just wouldn't start up. The power light would come on at the front of the machine, and just stay on with a blank/black screen for as long as I left it, until I force shut it down by holding the power button for 5 seconds.
I can keep going through this process in the hope that it will eventually start ok on its own, but it never does. When I take the ram stick out that I added about 9 months ago it will then start up ok. I can then put the ram back in and it will work ok for another few weeks before going weird again. In System Profiler it says that both Ram sticks are ok. So I'm not sure if it's bad Ram, and removing it makes the system work ok, or if just the act of removing Ram helps to get it going through the start-up process ok.
I have done all firmware updates for Rev.A Intel Imacs. Though I only did the IFE firmware update recently after the problem started in the hope that it would help. Before I did the firmware update and was trying to sort it out it once got a grey screen and made a high pitched electronic sound, as well as not starting up and just getting a black screen
I've also done a complete clean install of the OS, re-formatting the hard disk first. The machine worked fine for about a day after this but then I had to resort to removing the Ram again to get it to start up ok. So at the moment I'm running ok for a couple of days on the original 512mb module
Has anyone else experienced this or similar problems with their Intel Imacs?
Can bad Ram work sometimes and then act up?
Imac CoreDuo 1.83ghz Mac OS X (10.4.8) 1GB RAM , 160GB. And Powerbook G3 Kanga, Powerbook G3 Lombard.

Hello and Welcome to Apple Discussions.
My advice would be to contact AppleCare now. As you have only days left on your included AppleCare best to start the ball rolling now.
Cheap RAM can manifest all kinds of issues, so running without it in the meantime may be a way head. What brand/spec is the RAM?
mrtotes

Intel iMac - won't start - grey screen & progress bar

I have a 2006 Intel iMac - 20" model, Intel Core Duo, 2GHz, 2GB RAM, 250GB HDD, etc. It was one of the very earliest Intel iMacs. Kept updated, running OS 10.6, etc.
It has worked extremely well for over 5 years - apart from the Superdrive being temperamental sometimes - but has suddenly gone wrong.
Last week the machine completely froze for no apparent reason. I had to force a reboot. This failed - grey screen and the grey spinning wheel (if that's what it's called), indefinitely.
Forced reboot again and this time held down the shift key to go into safe boot mode. This time it was successful, and I was able to get to the logon screen & log myself in. I opened Disk Utility & attempted to do some diagnostics but the machine froze again.
Looking around various other forum postings...I rebooted the machine in single user mode and was able to get to the command line to type 'fsck -fy' to attempt to fix disk problems. This failed repeatedly, with an error message 'invalid node structure'.
I tried to boot my machine from the OS X disc but my Superdrive refused to play ball - it would not read the disc (or any other disc for that matter, including a copy of DiskWarrior that I have).
I have now got hold of an external DVD drive in the hope that this would show up as a boot device when I switch the machine on while holding the option key down. No such luck - the drive powers up ok (power via USB) but I'm not given the option to boot from it - in fact that screen doesn't appear at all.
All that happens now on powering up - regardless of what I do - is the grey apple symbol appears and a progress bar beneath it. The progress bar gets stuck about 5% of the way along, and then after about 10 minutes it disappears and is replaced with the grey spinning wheel thingy. And then it just gets stuck - nothing else happens.
HELP!
All my important data is backed up on an external drive via Time Machine, so that should be safe, but I'm desperate to get the machine running again.
One thing that occurred to me is that I've had a program called ReFit installed on the machine which allowed me to run the machine as dual boot etc. (and I do have a couple of other small partitions on the drive, not currently used) but the ReFit welcome screen stopped appearing a couple of weeks ago for some reason. I'm wondering if this has somehow messed things up...?
Grateful for any suggestions...
Thanks,
Alan.

For the drive, you should be OK with any SATA 2 at 3 MB/s transfer speed. You could also use a SATA 1, no jumpers needed. (Not SATA 3 - can't be jumpered down.) The early 2006 Intels were 1.5 MB/s -- at least the drives were, so I'm assuming the SATA controller on the logic board was also. Might just be SATA 2 hadn't yet been introduced and can run the faster SATA 3 without jumpers. My guess is not. You should be able to set jumpers on the drive for backwards compatibility. You'll have to contact the drive manufacturer or go to their website for that info.
http://www.everymac.com/systems/apple/imac/stats/imac-core-2-duo-2.16-20-inch-sp ecs.html
As for the superdrive, I'd contact the manufacturer to check on compatibility.
Glad I'm able to help. BTW, in case you haven't noticed, maybe you want to have a look here.

24" iMac won't start when iPod is connected

My 24" iMac won't start up/restart if my iPod is already connected to it. If I restart with the iPod connected, I just get a gray screen (with no apple logo) forever. Has anyone else experienced this problem? If so, any solution? I have Windows installed with boot camp, don't know if that's the problem, but I tried reseting the p-ram, but to no avail...
Intel iMac 24", 7600 GT, 500GB, 2GB. Titanium Powerbook 667 MHz G4, loaded. Mac OS X (10.4.7) 30 GB iPod Video

My suggestion would be disconnect the iPod. That's just me though.
http://docs.info.apple.com/article.html?artnum=93953
I'm guessing Boot Camp is the culprit. Whatever emulated BIOS it's using doesn't like the iPod as a startup disk.

IMac won't start with Thunderbolt Display connected after firmware update

After updating my thunderbolt display firmware to version 1.2 this morning via the App Store, my mid-2014 iMac won't start up with the external display connected. I can get the iMac to start up only by disconnecting the display's thunderbolt connector. After the iMac comes up, I can reconnect the display and everything appears to function normally. I've tried several restarts and the iMac won't start up with the display connected. Anyone else experience this?

Hello rameta,
It may help to reset your Mac's SMC and PRAM.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Reset your computer’s PRAM
http://support.apple.com/kb/HT1379
Cheers,
Allen

IMac won't start up passed the grey screen

Last friday my iMac (late 2006, 24", 2.33 duo core Intel, OS 10.6.8) gave me the spinning beach ball.
Restarting resulted in: first the apple screen with the progress indicator, followed by grey screen..
That was it. It hangs at the grey screen.
I've been busy this weekend testing all kinds of ideas to get my imac to fully start up again.
I checked the RAM, it's fine.
I flushed NVRAM, wild guess, but nothing changed.
Starting up in safe mode doesn't work.
Starting up in recovery mode doesn't work.
On the upside, I was able to start my imac up in Target mode. Using the host computer and Disk Utlity I can see there's nothing wrong with the HD. All the data is still there!, so later today I'll make a copy of the complete HD, hoping/thinking that I won't copy whatever is wrong.
I had Disk Utility repair all the permissions.
I've used the host computer to reinstall the OS on my imac.
But on start up my beloved iMac still won't get passed the grey screen.
I'm thinking something goes wrong before my Mac even gets to the HD. Maybe it's the firmware, but I'm not really sure that firmware matters in this case. And I wouldn't know how to reinstall the latest version of firmware because my imac won't start up from it's disk drive
I'm thinking maybe something could be wrong with the graphic card's RAM, though on start up I can see the apple logo just fine.
I'm not able to start up from CD, I've tried that because I wanted to reinstall my OS (before I figured out how to do that in Target Mode) by putting the OS disk in my imac's own disk drive. Staring up with the C key still gets me the grey screen. Staring up with Option key shows no other option but the HD.
So is there anybody out there who has an idea that could help me further along?
Any help is greatly appreciated!
Frank

Hi Jan,
If you have another firewire Mac you can check if the HD of your Mac is OK by connecting them with a firewire cable and use target-mode. That way I found out my HD was just fine.
It also offers you the chance to run a diagnostic program to check if anything else is fine. I used TechTool to do that. But everything checked out fine.
In the end I decided the problem is probably hardware. Some electronic part that broke. Very frustrating that some small transistor or so is keeping me from using my otherwise fine iMac.
I contacted a repairshop that also works for the local Mac retailer. They told me my iMac was concidered 'classic' and therefor it wasn't economically not worth the trouble trying to repair it.
I gave up, took two weeks to mourn the loss of my beloved iMac, and bought a Mac mini.
FrankV
Judging by your name I'm guessing I could've anwered this in Dutch.

G5 iMac won't start! Help needed.

Got a new intel iMac. Gave my husband my old G5 iMac (not intel). It was working perfectly. For some reason unknown to me, he decided he was going to reinstall everything from scratch so he grabbed the first disk he saw and put it in the computer. It was the startup disk for an intel computer & NOT for the iMac G5.
Did he fry the computer? It won't start up. Keypad & mouse won't respond.
The screen can't find the driver (no surprise) and says "panic: we are hanging here...." I can't get the disk out of the drive. Service contract is up. Is there a way I can connect my laptop to it and get it to respond & spit out that intel disk? Perhaps if I open the cover up, I can into the CD drive and get the disk out. All ideas appreciated.

Quote
J.C posted "Re: G5 iMac won't start! Help needed." on Feb 4, 2008 4:53:20 PM.
Hi Mel Kev
Have you tried holding down the left mouse button when you turn the computer on. Holding down the left mouse button should force eject the disk.
Hope this helps
J.C
UNQUOTE
And it WORKED! (I really wasn't in the mood to do surgery on the computer this evening). Thanks all!!! You are awesome!
Now, if I can just find the original installation disks.... They are in this drawer somewhere....

HT1767 iMac won't start up.

My iMac won't start. When you turn it on the apple logo comes on but it keeps trying but never turns on. I tried unplugging it and plugging it into a new power source didn't work. I tried starting it up in safe mode didn't work. Any ideas out there?

There are some good Apple Support articles about startup issues, but which one to read depends on your operating system and model.
For example, if you are running 10.1-10.4, this one is good: Resolve startup issues and perform disk maintenance with Disk Utility and fsck
Here's one for 10.4-10.6: Mac OS X: Gray screen appears during startup (I know the apple logo is showing up for you, but good things to try anyway).
If you decide to run fsck as mentioned in the first article, be sure you read this article first: Mac OS X: How to start up in single-user or verbose mode
Regardless, are you in fact running a late 2009 iMac? If so, it's an Intel mac, and you're in the wrong room. You'll want to move your post to the Intel iMac community which has more active users. Remember to post your OS.

20" imac won't start up-flashes between blank grey screen and black screen

20" imac
2GHz Intel Core 2 Duo
Was running system 10.5.8 just fine. Worked great.
But then I wanted to give the imac to a relative. And so, I tried to boot from the original grey mac install dvd to wipe the hardrive and set the imac back to factory specs.
But it wouldn't boot off the dvd. All It would do at restart was to flash slowly back and forth between blank grey screen and black screen. So, I tried the Leopard update dvd. Same results. So I zapped the pram and tried again. Same results.
If I just pushed the start button tho.. the imac would start right up and run fine. However, I didn't want to give it to someone else with all our information on it.
I finally restarted it and held the "T" key to turn it into a giant firewire drive, hooked it up to our other 20" imac, and used the disk utility from the second imac to erase the drive of the first imac. Then I inserted the grey install dvd into the second imac and selected the drive of the first imac and ran the install process.
Now, the first imac won't start up at all. Just a continual grey screen for a bit, than a couple of buzz sounds in the machine and then the black screen... than back again.
It ran great before I erased the drive and re-installed OS 10.5
What's wrong? How do I get the machine to either boot off the install cd?

So, I've figured out a little more on the first machine. It's a 20" 2.6 GHz Intel Core 2 Duo running 10.5.8.
It ran great. But, I wanted to erase the hard drive and reinstall the OS system before giving it to a relative.
I found that although the optical drive would read and write to normal cds and dvds, the machine would NOT boot from the grey start-up disks I had on hand. ( I have two imacs, and I tried both sets of dvds without success.)
I zapped the PRAM, and used disk utilities via firewire connection from my other 20" imac to check the hardrive and make repairs. Disk Utilities couldn't find any problems. So, using disk utilities from the other imac, I erased the first imac's harddrive and then used the install dvds on the second imac to install the original OS to the hard drive of the first imac.
(looking on the hard drive of the first imac, I can see all the contents)
However, the first machine will not start up. It just switches from grey....to black..... then grey..... and then black again.... over and over
Why won't it boot from the newly installed OS on it's own hard drive?
And Why won't it boot from the original install dvds?
How can I get it to start up again?

IMac won't start - progress wheel

My iMac intel duo won't start - all I get is the spinning wheel. I'm pretty sure that the internal hard drive is cooked, and I'm ready to take it to a repair center; but I can't get my external hard drive to shut off and I don't want to pull the plug while it is running. How can I safely turn off and disconnect the hard drive?
I have restarted from the disc, and my only options are reinstall the system, or run disc utilities.
I don't want to reinstall the system, so I ran the disc repair. Result:"Macintosh HD appears to be OK," but on the top left, "250.06 GB WDC WD250" is in red. There is also a message that this drive has a hardware problem.
Biggest problem is still shutting down the external hard drive.
Help?

After I shut down the computer, the light on the external is still on and it feels like it is still spinning.
Is it safe to unplug the external hard drive in this condition?

Imac won't start white screen apple icon spinning gear

imac won't start. when turn on, I just get a white screen with apple icon and a spinning gear below the apple icon. what should I do to get it started and fix the problem? Thanks.

See if any of the suggestions in this link help:
http://support.apple.com/kb/TS2570

After installing update, iMac won't start up

After installing the last updates my iMac won't start up, starts what look like install then just shuts down.

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IMac won't start - should I reinstall OS?

Recently my iMac won't start up - it goes to screen with folder + question mark. I've run Disk Utility, repaired hard drive, but there were no reported repairs to make.
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Don't want to bother erasing it if there's no point... any advice greatly appreciated.
Also - anyone who's had their iMac repaired - what are the costs like?

I've just suddenly had the same problem - for no apparent reason as far as I can tell. The night before last I switched off my iMac as normal, and yesterday morning switched it back on. At first it would start, but crashed as soon as I tried to start any applications. Then it wouldn't start at all, and just got as far as the gray screen with the apple on it. After trying resetting the PRAM, switching on and holding the on button for 10 seconds, it was no different...
So, I tried doing a archive-reinstall from the original leopard DVD I bought from apple. This did a successful disk verification, but then said it couldn't install mac os due to a problem with the basesystem package. After that it wouldn't let me try another archive-install and only gave the options to install as new, or erase and install. The latter I don't want to do, and the former just gives the same basesystem error... All I get now is a flashing folder with a question mark and not even the gray screen...
I have tried using the diskutility to verify/ repair the hard drive and it says all is well...
I have heard this may all be due to dodgy RAM chips, but I have never messed with them or altered them. It just seems odd they should suddenly fail when they were working fine before.....
Any ideas would be much appreciated. A lot of data at risk
Dan.

Intel iMac won't start! 17"

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