My iMac freezes on startup. I can't use safemode. The sleep light turns on. The fan and cd drive turn on as well. The screen stays black though. Once it got to the spinning icon that you see before the "OS is starting up" dialogue. Then it froze. When I had it on last it suddenly went unresponsive and a message pooped up that said something like. "Your computer needs to restart. hold down the power button to turn off." It had translations in 3 other languages (french, chinese, and spanish.I think).I couldn't do anything but do what it said. It froze the next time I turned it on. I can't turn it on in safemode.
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Re: iMac freezes on startup. Can't use safemode.
Safe mode just requires holding shift down during start up and if it starts up at all this should be possible. Once in safe mode, you should be able to use Disk Utility to Verify disk and Fix Permissions. To Repair disk or with/without safe mode you need to startup with your install disk and on the first screen or after selecting language, use options to select Disk Utility. You really should tell us the MacOS version--10.3.9 10.4.11 10.5.8 or 10.6 are current and tell us your install disk version, too. With safe mode you can use terminal to run fsck to fix the disk, read the man page. Alternatives include starting up in Target Disk Mode (command+t at startup) and using your computer as an external disk for another Mac by Firewire or possibly USB, fixing it using the others software. These methods in descending ease.
A now permanently dark screen would indicate a bigger problem and a trip to an Apple store for an evaluation. Tell us your iMac model--could affect whether you can easily savage your disk data in this case.
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boot the computer in safemode. check if it will still lock up. if it does then run a hardware diagnostic test. if it doesnt clear the startup by opening the system configuration utility then disabling the items under the startup tab then rebooting to normal mode. regarding the computer not going to sleep mode when closing the lid, visit the power options in control panel and check the settings on what the computer does when you close the lid.
Try going into Safemode. If the system stays on while in safemode, when try disabling start up items.
To go to safemode, press F8 when starting the PC or while you see the Dell logo.
To disable start up items, Click on Start>Run>then type MSCONFIG, then press "Go". IN System Configuration Window, click on Startup tab, then uncheck all the items. You can also use this link as guide.
If the system works find on safemode, or after removing startup items, then you have a software issue. OS reinstallation is easiest approach.
same thing happens to me - most of the time it will just randomly freeze; occasionally i get an unresponsive black screen. this 24' aluminum imac usually has startup problems also - sometimes it will "gong" and nothing else; sometimes the apple logo will come up and then nothing else; sometimes it will load the logo and then spin for a few seconds and then freeze - the only option is to manually shut down. there is no rhyme or reason to it
You may have to contact Advent to try to get a recovery CD - however, there are a few things to try.
1) Try booting the system into SafeMode. To do this, as soon as you turn the system on, tap the F8 key und you will get to the Startup Option screen. Use the arrow keys to highlight SafeMode and press 'Enter'. This will either work or it won't and it may freeze with the error. IMPORTANT: Write down the error - we may be able to find a workaround with that information.
2) If you cannot get to SafeMode, reboot the system and follow the same process to get to the Stoartup Option screen. This time select SafeMode with msdos prompt. If you can get there, we can possibly run a System Restore in DOS and turn your system back to before you had the issue.
Let me know how you make out and we'll move on to the next step.
The iMac (Slot loading) computer's disc eject mechanism is electrical instead of mechanical. To eject a CD-ROM disc at startup that contains system software, press the mouse button until the computer ejects the disc. If the disc does not contain system software, wait for the iMac to start up and drag the disc icon to the Trash.
If either of these steps fails to eject the disc, push the drive's manual eject button with a small, blunt object like a paper clip. This button is located to the right of the CD/DVD slot as shown in Figure 1. The computer must be turned on to eject a disc in this manner.
Figure 1 Manual eject button
Once the disc is ejected, it extends just beyond its center hole so you can remove it from the drive. If the disc fails to eject, while holding in the paper clip, use another CD to gently push against the inserted CD. This gentle pressure may help to release the inserted CD.
Important: After ejecting the disc with the manual eject button, you must restart the iMac in order for the CD-ROM or DVD-ROM drive to work. DONT FORGET TO VOTE
Get out your Mac OS disc and restart your computer and get that disc into the drive. You may need to restart with the disc in, but that's ok. Just restart again with the "C" Key pressed and the computer will launch with the OS disc, and then you can access the file menu when it finishes launching. Choose "Disk Utitlity" from the file menu and you can repair the system files on your hard disk. then restart without the disc in the drive. K