Having startup issues.

Whenever i turn on my computer it goes throught the whole process of booting up, until it get past the starting up mac osx. the it switches to a black screen that says Darwin/BSD and asks me for my login. I have tried entering my login and password, but i do not have any results. t just goes back to the blue screem with the rotating circle.
Does anyone know how i can fix this. i have tried resetting the PRAM.

You have some corruption in some system files. Try this : http://docs.info.apple.com/article.html?artnum=106464
If all else fails archive and install

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    when I start my laptop it loads a third of the way and shuts down automaticallyI've tried to safe boot, repairing discs and clearing RAM but nothing has worked. basically I've come to the final step of having to a erase my hard drive and reinstall mountain lion however Apple support suggest that I install from a disc however I installed mountain lion from the App Store. can anyone help me go about this?

    Install or Reinstall Lion/Mountain Lion from Scratch
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
    Boot to the Recovery HD:
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  • 24" iMac having startup issues

    I thought I would post here in an effort to try and see if there is anything else I can do before heading to an Apple Store tomorrow. I own a 24" iMac, which I got in the fall 2006. A few weeks ago, this problem first occurred. The computer started up and the chime sounded then it got to a gray screen with an Apple logo and a spinning wheel below it. Then the spinning wheel would freeze. Then the screen would go black. I don't quite remember how I got the computer working again after the first time this happened (probably one of the solutions below), but I did and now the same problem has occurred today and I cannot figure out any way to fix it.
    Solutions I have tried today:
    1) Unplugged AC adapter and let computer alone for 30 secs and then plugged in and restarted. Nothing changed. Computer froze as describe above.
    2) Unplugged all the peripherals and restarted. Nothing changed. Computer froze as describe above.
    3) I reset the SMC by removing the SO-DIMM modules and reinstalled them. Nothing changed. Computer froze as describe above.
    4) I reset the PRAM and NVRAM by holding command option P R. Nothing changed. Computer froze as describe above.
    5) I tried booting from the OSX Install disk. It would not do so. Computer froze as describe above. Computer froze as describe above.
    6) I tried starting up holding C and it actually gave me the option of selecting the hard drive. But then it froze as described above.
    So far, I plugged in a firewire cable and am using my MacBook to backup files so I can access the computer and its various files via this FireWire Target Mode.
    Does anybody have any further suggestions before I take it in to an Apple Store?
    24" iMac   Mac OS X (10.4.8)  

    Add me to the list on of startup problems with my 24" iMac. First off the computer seemed to be slowing up and some of my icons were disappearing.....labels were still there but not the icon. Then I tried installing the 10.4.9 upgrade. Big mistake.......it wouldn't completely install even when I used the standalone installation. Kept getting errors and the try again message.
    So after all of this, the computer would not boot up from the hard drive or from the install DVD. Fortunately, I have a external startup drive and eventually I was able to get the computer to startup from that drive. From there I was able to startup from the install CD DVD. I tried to repair Disk but it failed because of an error and I am now doing an install and archive while I write this. Keeping my fingers crossed.
    This is my second iMac that I have had startup problems. With my last iMac, it was the hard drive......Apple replaced it and the computer works fine.(my wife is now using that computer) It was during my problems then that I learned it is helpful to have an external startup drive. I operated that iMac from the external startup drive a couple of months before I took it in for repair.
    Oh boy, the first install DVD just finished and it won't eject and now I have the message "there were errors installing the software" Try again.
    Complete frustration...........I will try the installation once more and then probably a clean install if that doesn't work.
    iMac G5, G4 Powerbook    
    iMac G5, G4 Powerbook   Mac OS X (10.4.8)  
    iMac G5, G4 Powerbook    
    iMac G5, G4 Powerbook    
    iMac G5, G4 Powerbook    

  • Trying to Revive a Older iMac G4 Flat ... Having startup issues .. Help ??

    Hello all
    I received a Imac G4 ( 800 ?? one mem slot ) , put a harddrive I had laying around into it that I know worked - Put a dvd drive into it I had laying around and with some happiness started up . At first , I had no chimes , just would boot to the Question mark /Folder icon . There is NO Operating system on this ... I tried booting into cd/dvd with no luck it just goes to folder/? , I tried booting from my Leopard/Tiger and OS9 cd's ... No luck .... After researching some forums and google'd for a night or 2 I found out how to reset my PRAM and NVRAM , After I did this I got chimes VERY COOL or so I thought .....I tried all the basics again ( held C , Tried selective startup ) same results.
    When I choose to do a selective startup ( option key held ) It shows the OSX disc but when I choose it the CD spins then it just stays at the menu , After a minute or so I can then refresh and try to click the arrow again .... Just stays in a loop I guess
    I then booted the Imac into target disk mode and used my macmini Intel to install leopard to the drive on the Imac and I could install and even Booted my macmini from it ...
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    Since The day I purchased my Mac This forum has been incredibly helpful , I didn't want to waste time but I really have run out of ideas and have looked everywhere I myself can think of ....Any help would be Greatly Appreciated ,Thanks again

    Hey Jwile,
    This is from the service manual:
    "Screen is dark, fan is running and the hard drive is spinning. You may hear the startup chime as well.
    1. Reset parameter RAM. Press Command-Option-P-R during startup before “Welcome to Macintosh” appears.
    2. The system software could be damaged. Start up from the system CD that came with the computer.
    3. Remove the user access panel. With the unit powered on, check if a red LED (shown below) is visible in the access door. If the red LED is on, power is on. If you don’t see the LED glowing red, follow the steps under the symptom “No Power”.
    4. Disconnect the A/C power cord. Place the unit in the service stand and remove the user access plate.
    Press the PMU reset button on the logic board. Refer to “Resetting the PMU on the Logic Board” mentioned earlier in this chapter.
    5. Check for external video. Connect an external monitor to the mini-VGA port. If you don’t have external video, replace the main logic board. If you do have external video, go on to the next step.
    6. Open the bottom housing and verify that all the cables are securely attached. Pay special attention to the video cable (located near the modem). If the cables are securely attached, go on to the next step.
    Warning: Whenever the bottom housing is opened for service, you must do two things:
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    • The bottom housing has four torx screws that must be tightened to at least 17 in.-lbs. If you do not have a torque driver, you will have to make sure these screws are tightened by hand FIRMLY, BUT NOT FORCIBLY. Or, purchase the service tool (076-0899) in order to ensure the thermal pipe is firmly mated with the top base. If the bottom housing is not securely attached to the base in this
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    iMac (17-inch Flat Panel) Troubleshooting - 19 No Video Symptom Charts
    8. Replace the inverter board.
    9. Replace the LCD display. Important: If you are replacing the display, be sure to install the new display
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    10. Replace the neck assembly
    11. Replace the logic board.
    12. Replace the power supply board."
    So since you've had it apart I'd definitely check those connectors.
    There is definitely only one Ram slot on this board though , Thats the one thing im confused about .
    There's one slot on the logic board and another one under the user access panel in the bottom. It takes a laptop type memory. That's why that LEM profile lists two slots of different types.
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    Message was edited by: spudnuty

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  • New StartUp Issue

    My new MacBook Pro 17" has been having startup issues recently. After I shut down, leave, and come back, the startup issue occurs.
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    Any ideas guys??

    you can try to boot to safe mode ( restart holding Shift )
    - you can attempt to boot to install disc and disk utility
    - you can boot to AHT ( apple hardware test ) to see what component is failing ( insert disc, restart holding D )
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  • Startup issue when having more than one database on machine

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    Edited by: aymanzone on Jun 15, 2011 9:27 AM

    aymanzone wrote:
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  • Another startup-issue

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  • Have any ideas re: G5 startup issues? Long post...

    My dual processor G5 (purchased Jan. 2005) is in the shop, and, of course, out of warranty. It's been down for over two weeks. Here is the story of its demise:
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    Hi and thanks for the input. I just spoke to the Apple service guy and he still insists there is not a hardware issue. Apparently there is an Apple technical doc, available only to authorized techs, that refers to this particular issue, and the fix is a download and install (firmware, perhaps?) He has to contact Apple and confirm my G5 is within the serial # range for this particular fix.
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    Hey guys.
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