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Hi,guys my g4 imac is frozen. I've done numerous things,like restart on v mode or single mode.The imac tells me the problem,which is memory!If i take the four screws of the bottom and install a memory card.Should that help? Thanks Bobby from Houston,TX
That sounds like it would fix it. Have you recently updated the memory in the imac? It may be incompatable. Otherwise it may simply have become faulty over time.
Please make sure that before you open up your imac, you're not voiding your warrenty. I know that the aluminium imacs allow this, but i dont think the G4 versions do.
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You may have to go to single user mode and start from the terminal. Difficult. Otherwise, zap the p-ram by holding down the Apple Option, P and R kets at the same time after you here the chime. This should reset enough to get you running. Maybe. Or, hold down the shift key will restarting to start in safe mode. Or, hold down the option key will restarting and select your start-up drive from the menu,
You could try resetting the PRAM which resets various things to default status. You do this by holding down the following 4 keys together "cmd" "option" "P" "R" at the startup sound, keep them held down until it restarts and keep holding them down until you hear the startup sound 2 more times and then let go.
If that does not work try booting up in safe mode by holding down the shift key at startup and then when it boots up change the resolution to one that works and then restart.
1. Shut down the computer if it is on.
2. Press the power button to start the computer.
3. Immediately press and hold the Command (Apple) key and one of the following:
the "s" key for single-user mode. (Command-S)
the "v" key for verbose mode. (Command-V)
You have successfully entered single-user or verbose mode when you see white text appear on the screen.
Once you are in the Single user mode type the following:
fsck -fy <then press enter>
If this command returns with an error or reports that is found an error
but fixed it then run the command again and repeat until the drive
checks good.
Once you are done with the repair or feel satisfied, type 'reboot' and press enter.
I am going to have you take your Mac into Safe Mode to see if we can't remove a possible folder(s) that may be affecting your Mac's start up function.
Try these steps:
• Reboot your Mac • Upon restarting your Mac, press the Shift key. • Hold the Shift key until you see a White Screen with Gray Apple icon and eventually a spinning gear.
• When you see the Spinning gear, release the Shift key.
• Allow the Mac to continue booting up. Also this may take a little while (NOTE: this may take anywhere from 5 to 15 minutes to load to the Safe mode screen depending on the performance of your Mac, but if it exceeds this time, shutdown your Mac and try just once more. It may have just frozen up the first time around for you.)
• You are going to enter the Safe Mode (which looks like your main desktop environment - the only difference is certain start up items are disabled.)
• Once within the Desktop in Safe Mode • From the Finder Menu, click Go> Go to Folder • Type in this line: /System/Library/StartupItems • This path, is going to take you to the System Library folder which has all of your Mac OS X StartupItems.
• Remove all of those folders to the Trash.
*Reboot your Mac normally and see if you can access your normal User desktop environment.
This should help get your iMac G4 back up and running.
If Safe Mode comes up alright, I would install AppleJack, excellent troubleshooting article can be found here... Troubleshooting Tools: AppleJack Another excellent free tool for performing maintenance is Onyx (be sure to download the right version for your system). Install the package, then run it, it will check your drive and the structure, after this, click on the automation tab and check on everything for Maintenance, Clear Cache, Cleaning, and check on Reset -> LaunchServices database and Mail's Envelope Index. When it completes, restart. Repeat any time something seems flaky, if not try to run at least once a month.
Try holding down the shift key after you hear the startup chime. This should start the Mac in Safe Mode and force some cleanup utilities to run. (Note that startup takes a bit longer than usual in Safe Mode.)
The login screen should show the words Safe Mode in red when startup is done. You can then restart and the Mac should boot normally.
Try turning it on with the shift key down. This gives a safe boot. If it's going to turn on at all, it will turn on then. Also, boot it with Disc Warrior or Tech Tools and run some tests to see what is going on. I hope you find all is well, and that the repairs are just minor. Good luck.
Change the power supply to start. If the supply does not fix it, the mother board may have a fault. Most of these types of failures are in the power supply.
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