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My computer freezes when starting up- Mac G4 933 Mz, will not start up using disc & holding down 'C" key

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First, Try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk.
You could have some directory corruption. Let us know what errors Disk Utility reports and if DU was able to repair them.
But it sounds like the following;
You are experiencing a Kernel Panic as seen and described in Apple doc.#106227. If not, disregard.
FJ has some good KP tips.
Here's the most used site for Resolving Kernel Panics. Please do all the steps in order, even if you don't think you need to do a certain step.
Do the Disk Repair first; that may do it! (let's Hope!)

Posted on Jul 23, 2008

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Optiplex gx620 2 beeps on start up, displaying 123.


If windows 7 you need to burn a repair disc & run it. Go to Maintenance, creat repair disc (use one CD & mark it with Dell gx62 on top, repair disc run first on bottom)
Restart your computer and hold down escape, F1 or F2 to get into the settings in the CMOS. You must chang the boot order of your startup. In CMOS use arrows to right to Boot to change to CD ROM then HDD so your CD will go into repair before starting the HDD. Each CMOS is different but usually you can use the f5 or f6 to change the order and f10 to exit & save the setting. Restart your computer after you put the repair disc in & that should repair your start up.

May 13, 2014 | Dell OptiPlex GX620 PC Desktop

Tip

How to Check your Computer when a Page Freezes


<p>1. Press the "Esc" once or twice and see if the computer returns to normal. If nothing happens, press a few times. If your computer does not respond, try the next step.<br /> <p><br /> <p>2. Press "Ctrl, Alt and Delete keys simultaneously and select Start Task Manager". Select Programs "End Task" to a status of "not responding" one by one and click OK. The programs should be automatically closed. If your computer is not responding to anything, press the button until the computer turns off.<br /> <p><br /> <p>3. Wait a few minutes before the computer. If the computer is in use for a long time, let cool before again. Overheating can some hardware components do not work anymore, because too much heat.<br /> <p><br /> <p>4. Deleting files or programs you no longer use, especially if the disk is almost full. When the computer tries to find a complete unit of information, they can freeze and become unresponsive.<br /> <p><br /> <p>5. The use of anti-virus software on your computer for malware, adware and viruses. Remove the virus. You can stop computer processes and cause a computer to freeze.<br />

on Jun 21, 2011 | PC Desktops

Tip

How to Troubleshoot a Computer That Won't Start


<span>Instructions</span> Things You'll Need: <ul> <li> <span>A Startup Disk Or A CDROM With The Operating System On It</span> </li></ul> <ol> <li> If your desktop computer does nothing at all when you try to start it, first check that the power cable is securely plugged in at the back of the computer as well as into a working power outlet. It's amazing how often this is the case.<br /> </li> <li> If you're starting from a button on the keyboard, make sure the keyboard is connected to the computer.<br /> </li> <li> If the computer is plugged into a surge protector, see if the surge protector has a reset switch that you can push. (If it doesn't have a reset switch and the problem is with the surge protector, it will need to be replaced.) Try plugging a lamp or other device into one of the surge protector's outlets to make sure it's working.<br /> </li> <li> If you can hear the computer's fan or hard-disk drive, or if you can see indicator lights on the main unit but the monitor stays dark, make sure that the monitor is connected to a working power source, that it's turned on and that it's securely connected to the computer via the video cable.<br /> </li> <li> If the monitor and computer have power but the computer displays a "Non-system disk or disk error" message, check to make sure you didn't leave a disk in the A: drive. If you did, eject it and restart the computer.<br /> </li> <li> If the operating system still won't start even though the computer and monitor have power, try restarting with a Windows CD-ROM in the CD-ROM drive or, if you've got a Macintosh, with a Mac OS disc in the CD-ROM drive. (You can start a Mac from the CDROM drive by holding down the C key while starting up.)<br /> </li> <li> If the operating system then starts, your problem is probably with the startup hard drive or with the operating system installed on it. If you can't fix the drive, you'll have to replace it.<br /></li></ol>

on Dec 24, 2010 | PC Desktops

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I have a dell c521 desktop I bought it from a rental place I do not have a reboot disc I've called dell suport they were no help is there any keyboard configureations to get this rebooted


***Using the Start Menu
  • Press a Windows key (the ones with the Windows symbol on as shown right), this will open up the Start Menu.
  • Use the cursor keys (the ones with arrows on) to highlight 'Turn off Computer' and press Enter to select it
  • A dialog box will open. Use the cursor keys to to highlight 'Shutdown computer', 'Turn off' or whatever your version of Windows says, and press Enter again.

***Using the 'three finger salute'
Hold down Ctrl and Alt, and press Delete.
Windows 2000 and XP Home Edition users will be presented with a dialog box with buttons on:
  • · Use the cursor keys to select the 'Shut Down' button and use Enter to select it.
  • · Select 'Shut down' from the list using the cursor keys and press Enter one more time.

In other versions of Windows the Task Manager will open:
  • · Hold down Alt and press U to open the 'Shut Down' menu.
  • · Use the cursor keys to highlight 'Turn Off' and press Enter.

***Hit Alt F4 'till you can't any more
The final method of shutting down that I will explain here is to hold down the Alt key and press F4 repeatedly. This will close every application that is open on Windows and eventually will close Windows itself. You may be asked if you want to save files by some programs, if so use the cursor keys and Enter to get past these dialog boxes.

Oct 24, 2010 | Dell Dimension C521 PC Desktop

1 Answer

I need to remove a disk from a Sony NEC Optiarc AD-7640S


CD Stuck in Device
First try the normal methods to remove the disc. Drag its icon to the Trash can in the Dock or select 'Eject' from the File menu. If you are running a virtual machine, e.g. VMFusion, ensure that the CD is disconnected from the virtual machine. This will sometimes allow the CD to now show up in Mac OS X. Shut down the computer and start up whilst holding down the mouse button. This may take some time, but keep your finger on the mouse button right up until the disc comes out or the log-in screen has appeared. If you have Toast Titanium installed on your computer, choose EJECT DISC from the menubar. Sometimes you can successfully use the eject disc button in iTunes even if the disc is not visible to the Finder Open Disk Utility and choose the disc you wish to eject in the left-hand pane, then click on the Eject button. Some Macintoshes have a paperclip hole that you can insert a straightened paperclip into, manually triggering the eject mechanism. Open Terminal and type "drutil tray eject" to eject the disc/tray, and "drutil tray close" to close the tray. Restart the computer while holding down Command-Option-O-F, to enter the Open Firmware prompt. Type "eject cd" without the quotes, and press return. The disk ought to eject. To start into OS X, type "mac-boot" without the quotes. Press return, and the computer will continue with the startup. (This will not work on an Intel Mac. There is no Open Firmware on Intel Macs. ) If your computer has an eject button on the keyboard, restart the computer holding down the Option key. When the startup disk selection screen appears, let go of the option key and press the keyboard's eject button.

Dec 23, 2009 | PC Desktops

1 Answer

CD won't eject. I've restarted and tried all the fixes recommended by MAC forums and so far no luck. Any other ideas?


If it is just the computer that isn't ejecting the disk (and not a physically "stuck" DVD) there is a way to force eject.

Go to Apple menu > Restart and hold down your mouse button until the disk ejects.

Or you can try the firmware method...

If all other methods fail, you can try to eject the disk using the firmware (this may not work on all computers). To use this method, start up and briefly use the computer with only the firmware loaded, not the standard Mac OS X interface.

To eject a disc using firmware:
Restart the computer.
When you hear the startup sound, press and hold the Command-Option-O-F keys. (The Command key has an Apple on it.)
Release the keys when you see a white welcome screen.
At the prompt, type:
eject cd

Press Return, then wait a few seconds. The disc drive should eject the disc, and "ok" appears on the screen when the action is complete.
Type:
mac-boot

Press Return.

Your computer starts up normally and you see the familiar Mac OS X desktop.

Apr 16, 2009 | PC Desktops

1 Answer

I have a clamshell ibook wich freezes on start up


Zap the PRAM. Hold down "P" "R" "OPTION" "MAC LOGO" keys and power up. Hold down keys until you hear the the starting chimes 6 times. Also try booting from the CD. Insert in CD drive and restart holding down the "C" key.

Dec 12, 2008 | PC Desktops

1 Answer

Unknown password for used apple


You didn't mention what type of Mac PC you got, so I'm going to assume it is one capable of running the OS X Operating system.

The best way that I know of to do this is to get an install disc for OS X. Start up the computer, Push and hold the <Apple> key on your keyboard, load the disc into the drive.

Pushing the Apple key during boot will bring up the boot menu. Tell it to boot from the CD/DVD drive.

This should start the install routine. Part way through the install it will ask you for what disc and directory to install to. Use the disc tools to tell it to format the hard drive and then choose that as your install destination.

The rest of the install should be fairly straight forward.

This will allow you to start with the Computer fresh and will clear the password from the system.

Hope this helps you,
Dave

Nov 14, 2008 | PC Desktops

1 Answer

Problem with our Apple Macs shutting down


A quoted suggestion from my Mac Guru: "They need to turn off the Energy saver preferences for processor cycling and hard drive spin down. They would actually be better off turning them down anyway since the G5 duals run really hot and aren't the most reliable model Apple ever shipped for motherboards failing."

As for the iMac 99, It would be more helpful to know what OS the unit is running. I remember hearing a story about a disgruntled employee putting the 'shut down app' in the start up items folder. This caused the Mac to start as normal and then shut down after the startup was complete. Try starting up the machine with the extensions off. 'Hold down the shift key at startup'

Feb 09, 2008 | PC Desktops

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