Question about Apple iMac Computers & Internet

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Hi. My iMac is frozen on the grey screen with the apple icon and logon logos. The mouse moves but I can't get past the is screen. I have tried the suggestion listed below including doing a hard shutdown (by holding the power button for ~ 10 seconds) and then attempting a PRAM reset by holding down the Command, Option, P & R Keys simultaneously but it is still get stuck on the above screen when restarted. Also, tried to reboot on Safe Mode by rebooting the iMAC with the Shift Key pressed down and finally I arrived back at the above screen with a "safe boot" in red at the top of the screen but still the screen is locked and I cannot get passed this screen. ( i.e. I cannot get any Finder menu to open to open up any folders as you suggested. Also, your #2 suggestion of trying SMC reset is not possible since I'm always frozen on the above screen. Any other suggestions would be appreciated. Otherwise, I guess I'll just have to bring the iMac back into the apple store to get it fixed. Thanks for any other input.

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  • 161 Answers

If its under warranty just take it into the store or
Try this,
Unplug it from the wall, (Remove the lead from the plug in the wall) unplug it from the computer, Isolate the PC from the power supply.

Wait a while before you open up the back of the computer to make sure all the capacitors are fully discharged and use a Anti-static wrist strap used to protect computer electronics
When a person handles computer boards, it doesn't take much of a spark to damage the circuitry. Anti-static wrist strap used to protect computer electronics.


Hi. My iMac is frozen on the grey screen with the  - 4ba492d4-3068-43f4-90b5-7ed979cf4eb5.jpg

Now reset your cards and other components. when you do this make sure you seat them back in correctly.
Take the small battery out of the motherboard, wait a moment and put it back in.
Hope this was of some help

Posted on Feb 09, 2014

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Posted on Jan 02, 2017

damien729
  • 221 Answers

SOURCE: My iMac G5 1.8 GHz 2GB ram computer desktop

Hello
If you can run it in safe mode, that means that you have an extension problem. I had most of the time problems with the ATI extensions.
First of all try too boot on another account, an new one would be good, to check if this is not account related.
Secondly i would reinstall the system (a clean install would be good, tough you can try an archive-install)
Thirdly if it isnt fixed I would delete all ATI extensions instead of the one that your graphic card uses. to delete: go to /System/Library/Extensions . 
Hope that helps

Posted on Aug 06, 2009

  • 1099 Answers

SOURCE: when my imac g4 tries to bootup it shows a folder icon

It sounds like the system is corrupted. What I would do is to get your instal disk and boot up holding down the c key on your keyboard. Once you have booted up go to the file menu and run disk utility to verify and repair the hard drive. Then go to the instal menu and instal a fresh system remembering to preserve the users data so you do not wipe anything. Hopefully this will work.

Posted on Oct 13, 2009

Macs R We
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SOURCE: imac periodically freezes. No recourse but to shut

This behavior is usually symptomatic of an internal drive that is failing or has failed. The pinwheel appears when the drive is unable to deliver a certain block that the CPU needs to proceed. In our shop, we would boot from a Drive Genius CD and run the Scan test on every block on the internal drive. If blocks show up as bad, the best course is to replace the drive. If no blocks show up as bad, we would run DiskWarrior on the file system to clear up any volume inconsistencies, which can also give rise to this symptom. If neither of these solves the problem, we could back up the user files to an external drive, reformat the internal drive using "erase writing zeroes," reinstall the system from scratch, then replace the user files.

Posted on Nov 28, 2009

  • 739 Answers

SOURCE: can't reboot iMac and disc is stuck in the slot loading drive

Shut down the mac by holding in the power button for about 10 seconds.
Is the CD a system CD or something else?
If it's a system CD restart the mac and hold down the letter C on the keyboard. after about 30 seconds the mac should boot up into installation mode. If it does, click on the language then then at the next page go up to the menu bar and locate Utilities and disk utility. Run the disk repair then try and restart. (The flashing ? means that the computer cannot find a start-up drive with a valid system on it. The repair routine can sometimes fix that - it doesn't always though.)
If it's not a system CD and you obviously need to get it out before you can do anything else - restart the mac but this time instead of holding down the C key, hold down the click on the mouse. It takes 10 to 15 seconds (sometimes longer) but it will force the computer to eject t the CD.

Posted on Feb 14, 2010

  • 1619 Answers

SOURCE: iMac will not power on.

Power supply would be the best bet.

Posted on Apr 13, 2010

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