My Mac shut down after the chime by itself! :(

So everytime I restart my iMac G5 (mine is the third generation I think) the one that has built in isight. Anyway I restart my computer, and then I heard the chime and it shut down by itself.
This happened once before.. and then I unplug it from the wall and let it "rest" for few hours, and it's okay again.
Do you think it has some power cord issue, or?
Help please... Thanks!!!

It's around $135, but look at [welovemacs.com] and see what they charge. You can also look at [http://www.synaptech.com/catalog> or [http://www.dttservice.com/imacg5.html] to see what they say.
Good Luck,

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Mac shuts down after boot. Is it the logic board?

mac shuts down after boot. Doesn't go beyond gray screen with apple. Is it the logic board?
I do not have the start up disks to safe boot or check the hardware.
Any ideas what the problem is or is it junk? It is 8 years old.

Shutdown your machine. Hold down the shift key. Poweron. Wait awhile Wait awhile while you harddrive
is being checked.
http://support.apple.com/kb/ht1455
I'd let the machine sit for awhile in open firmware & see if it stays alive. Do a few prints.
Sometimes if volumes don't appear in Startup Manager (what you get when you hold down the Option key at startup), you need to reset the Mac's PRAM, NVRAM, and Open Firmware. Shut down the Mac, then power it up, and before the screen lights up, quickly hold down the Command, Option, P, and R keys, until the Mac has chimed twice more after the powerup chime. Then, before the screen lights up, hold down Command-Option-O-F until the Open Firmware screen appears. Then enter these lines, pressing Return after each one:
reset-nvram
set-defaults
reset-all
"The reset-all command should restart your Mac. If so, you have successfully reset the Open Firmware settings."
http://support.apple.com/kb/TS1812?viewlocale=en_US
How to eject a cd from the internal cd drive:
eject cd
List of devices:
devalias
Restore Tiger 10.4 & Leopard 10.5 DVDs are available from Apple by calling 800-767-2775 as of January 20, 2013.
https://discussions.apple.com/thread/4720126?tstart=0

Mac shuts down after 10 Min.

My mac shuts down automatically after 10 Min., I must sign in again and the movie or whatever I just watch is still on in the back.
How can I prefend this cutoff?
I read all the comments, but no help. Even if I turn off the Mac or unplug it, it does not help.

No, did not help. I take it to the store. Thanks anyway.
2014-09-23 1:16 GMT-04:00 Apple Support Communities Updates <
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From the menu bar, select
           ▹ System Preferences... ▹ Security & Privacy
If there's a closed padlock icon in the lower left corner of the
preference pane, click it and enter your login password when prompted.
Click the Advanced button and, in the sheet that opens, uncheck the box
marked
          Log out after … minutes of inactivity
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Just updated my 4S to iOS 6 - it shut down after the instait showed a "connect to iTunes" icon.

Just updated my 3GS to iOS 6 - it shut down after the install - then it showed a "connect to iTunes" icon.
iTunes said the phone was in recovery mode & needed to be restored. Clicked "restore" in iTunes & get "iTunes is restoring the software on this iPhone" - didnt work - came back to showing the "connect to iTunes" icon.
Have repeated the process twice now - same result - "connect to iTunes" icon displayed on the phone & iTunes says the phone is still in recovery mode

See Here > http://support.apple.com/kb/HT1808
Be sure to Follow ALL the Steps.
Some Users have reported that as many as 8 or 9 attempts were necessary Before success.

Quicksilver shuts down after startup chime

Hello,
I got an old Quicksilver 2002 (933) which won't boot : it shuts down 3 or 4 seconds after the startup chime. What's wrong ?
Thanks

Thank you for your answer, but it didn't work.
I forgot something important in my first post : the story of this Quicksilver
So yes, I just acquire this Mac, didn't work at all. It was missing a screw on the CPU card. After adding the screw, the PM booted into my Tiger DVD. I shut down the PM to close it correctly. It didn't boot anymore for this time.
I tried PRAM reset, motherboard reset. I've taken apart all I could (modem, graphic card, hard drive, ...), I've replaced the PSU, but nothing. I noticed that when I try to boot without RAM, the powermac makes one beep (no RAM installed) but don't shut down after that ! So I tried with 2 different RAM modules on every RAM slot, but it didn't work. (each RAM module is PC133 and works fine on my iMac G3 DV SE).
I think the motherboard or the CPU is screw up, but which one ? Maybe I forgot one thing to make it work ?
Cheers, Aurélien
(sorry if my English is a bit bad, but I hope it will be understandable

I-Mac shuts down after sitting for a while, why and how can it be fixed?

i Mac shuts down when left for a time in sleep mode. Am I missing something or is this supposed to happen?
It has never happened while anyone is using the computer but that may just be because it often sits over night without use.
Am using a logitech Wave USB keyboard and mouse because my wife likes it.

OK reset the SMC > http://support.apple.com/kb/HT3964
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Press and hold the power button for 5 seconds.
4. Release the power button.
5. Attach the computers power cable.
6. Press the power button to turn on the computer.
and check all of the power connections.
The iMac's are sensitive to power issues (sag or momentary outage) while in sleep mode. If in the Energy Saver preference "Start up automatically after a power failure" is unchecked (as it should be) then you could/would/should find the iMac off after a power problem.

Hi my desktop starts and then shuts down after the apple logo and an oblong box appear.thanks

hi my mac
desktop starts then shuts down after displaying the apple logo and an oblong box.
thanks

Sounds like something is badly wrong with your system. First step would be to start up from your Mac OS X install disk, by inserting the disk and holding down 'c' at startup. Select your language, then choose Disk Utility from the Utilities menu. In Disk Utility, choose your hard drive and click the Repair Disk button.
If problems are repaired, try restarting and see if the problems are gone.
If problems couldn't be repaired, you can try DiskWarrior, which can sometimes repair problems that Disk Utility cannot. However, if nothing works, you probably are going to have to erase the hard drive and reinstall the system from scratch. Hopefully you have backups!
If there were no errors, or they were repaired successfully but that didn't fix the problem, then you should try booting into safe mode by holding down the shift key at startup. If that works, you may have some bad third-party software. What that might be is hard to say, though.
If nothing works, try rebooting from the Mac OS X install disk again and install Snow Leopard right on top of your current system. That shouldn't disturb your apps or data, but of course, if you don't have backups, you're in trouble if something goes wrong.

Mac shuts down after 5 minutes Help!!!!

My computer: imac G3, DV Special Edition, 500Mhz, 384 mb ram, 80 gig hard drive
This is an odd one...like many others before me the computer just died one day. it would not start up, no sounds, just dead. A few minutes later I tried to turn it on and it came on, but 5 minutes later, it died.
This is the strange part. I took the plug from the socket and waited a few minutes, then pluged the computer back up. It came on. But only for a few mintes and again shut off.
This time I left the plug in the socket, waited a few minutes and tried again. Nothing.
I then took the plug out waited about 30 minutes and it came back on for about 5 minutes and shut down. It only seems to come on if I let the computer sit idle with the plug out.
I have noticed that the computer does not keep time properly.
What I have done.
1. I have pressed the Cuda Button, and yes it did start up, but only for about 5 minutes.
2. I have tried to reinstall the system hardware, but the computer dies before completion.
Should I replace the battery? What else can be done?
Help!

I have the same problem. I don't have good news, though. I have replaced the battery, pressed the reset button, even replaced the power supply board (not the video board -- which is the only thing I have decided I'm not willing to do). My computer usually shuts down after 5 minutes, but will sometimes stay working fine for a couple of hours. I managed to update the firmware and OS to the very latest, but still it dies. Mine will also occasionally flicker and freeze, which can be restarted by holding down the power button.
I would replace the video board, except the people trying that don't have quite the same problem (theirs don't start up at all), and there is no source I've found that would have new boards, so you would get a bad board, or the same problem eventually. Some people point to a transformer on the video board, but again the symtoms are not quite the same (they smell burt electronics or hear a hissing/crackling sound before it dies.
I have just packed mine away and I'm working on a new G5, but I sure hope the old iMac can be fixed so my kids can use it. I just didn't want you to have to go down the same road just to find nothing helped. Good luck, and if you have any new ideas, I would be glad to hear them.

Mac shuts down after security update 2007-005

I installed security update 2007-005 and now after going to sleep the mac just shuts down. I have repaired permissions and run DiskWarrior. It just keeps happening.
Karen
iMac G5 Mac OS X (10.3.9)

Since I have installed security update 2007-003 and 4, DVD player was disabled. now that apple released security update 2007-005, I am now facing more serious issues with the entire system halting (the clock is frozen and the mouse turns into a beach ball... every once in a while)! I am beginning to suspect that the last three security updates need to be avoided at any cost since I have had so many problems with them!
So, in answer to your question, I would just run a clean install of OS 10.3, and never install security update 2007-004 and 5 until apple assures us that there are no more flaws in the security updates again!

Mac shuts down after start up and before it was acting very slow, please help!!!

Recently my imac has been running unusually slow when I open/close apps or when loading things, it sometimes would freeze or take about 20 secs to load etc.
So in an attempt to fix it it cleared all unnecessary files from my computer but nothing too technical.
Then yesterday i was told by my brother to go onto disk utilities and verify/repair the disk. Both times it failed and further repeats failed. After the repair disk failed a message along the lines of "back up data you want then restore the disk" something like that.
Now today when I started up my computer in the morning it was fine, then a couple of hours ago I restarted it, and now it won't turn on properly. It goes to the apple icon with a spinning loading wheel and a empty bar underneath and after about 20 secs it shuts down. So then I did the thing where you hold down cmd and r to open osx utilities and went to disk utilities again to try and repair/verify the disk and again the same failure and messages came up suggesting to restore my disk.
Being 16 I only understand so much and understand that I will probably have to put in the installation disk or something and "re do my computer from scratch." But I do have things I want to back up before I do so but due to the load up problem I have no way of backing up photos, music and files and i don't know if the time machine has backed up the data for me (I don't really understand the time machine). I'm currently using my phone to post this, any help would be greatly appreciated because I don't really know what else to do now. My imac is 21.5 inch that I bought around 2years ago late december time. Thank you for your time

Sounds like a classic HD failure. Take the machine to your local Apple Store or AASP, if it is still covered by AppleCare they will handle it at no charge. If you have been backing up then once the machine comes back restore from backup. I get you are only 16, so I'd explain to your parents the computer needs to be taken in for service, if they bought it for you they would know if it is covered by AppleCare or not, assuming they originally bought the computer for you.
Good luck.

I am having problems syncing my iTunes music to iTunes Match. ITunes shuts down after the 2nd step every time. Does anyone know how to fix?

Every time iTunes Match starts up, it gets to Step 2, almost makes it to Step 3, and then crashes and shuts down iTunes. I've restarted the computer, and reinstalled iTunes for Windows. Anyone have any idea what I should do next? There are songs that I can't sync to my iPhone 5S because of this.
Thanks!

Welcome to AD!
I have a regular post for the top 3 or 4 fixes for that 9808 error. Obviously you are going to skip #1, since you've already tried it. Let me know how you get on with the next 2.
The top 3 fixes to itunes error 9808 seem to be
1) Go to Start > Control Panel > Internet Options > Advanced, make sure that SSL 3.0 is checked and TLS 1.0 is checked. Also under Security make sure that the “Check for server certificate revocation (requires restart)” is unchecked. Then click ok and fire up iTunes.
2) The culprit was Norton. The users are set up as Admin and Standard. I have Parental Controls turned on in both Vista as well as Norton. Admin users had no problems connecting to iTunes. Standard users would get the error. I had to go to Norton’s Personal Firewall and add the program “iTunes Helper.exe” and set the option to “Allowed” (”iTunes.exe should already be in the Allowed category.) in order for the standard users to be able to connect.
3) close iTunes if you have it open right now. Then go to C:/Documents and Settings/username/Local Settings/Application Data/Apple Computer/iTunes. Delete or cut the preferences.xml file which contains your iTunes preferences. Then go to C:/Documents and Settings/username/Application Data/Apple Computer/iTunes and delete or move the preferences.xml file. For Mac users, there is only one file you must delete or move a to a new location and is located at User > Library > Preferences > com.apple.itunes.plist. Restart iTunes and it will recreate those two (or one) files with the default settings. Feel free to set your preferences back to what they were and then connect to the iTunes store and enjoy!
And #4, see if you can get into the iTS from a different windows admin account on the same PC.

My MacBook won't go passed a grey screen and the apple logo . It has a loading bar but doesn't do anything and just shuts down after the loading bar is complete... HELP!

Please please help! I'm a college student taking finals. Need it fixed asap

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
a. Boot into the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 3
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 4
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 5
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Step 6
Boot in safe mode. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 6.
If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)
If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 7
Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
Step 8
Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 9
Repeat Step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
Step 10
This step applies only to older Macs (not current models) that have a logic-board ("PRAM") battery. Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a boot failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 11
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

Problems with Mac shutting down after....

i open programs. the weird thing is that the monitor prefs open up with the monitor and power light glowing brighter.
i have already contacted apple and their infamous 49$ out of warranty service got me zip. anyone else ever have this problem
15" appl lcd thats the same age as the comp.

The logic board is dead.
getting a new imac 24 inch 2.8 ghz, 2 gig memory.

IMac shut downs after Apple logo appears!

Since I installed Maverick my iMac been acting weird. Now when I turn it on it shuts down after the Apple logo appears!
I've looked for similar problems but I've other issue here, I've a login security username\password. So, I can't pick the hard driver and repair it simpley!
Any help...

Try these in order testing your system after each to see if it's back to normal:
1. a. Resetting your Mac's PRAM and NVRAM
    b. Intel-based Macs: Resetting the System Management Controller (SMC)
2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
     Boot to the Recovery HD: Restart the computer and after the chime press and hold down the
     COMMAND and R keys until the Utilities menu screen appears. Alternatively, restart the computer and
     after the chime press and hold down the OPTION key until the boot manager screen appears.
     Select the Recovery HD and click on the downward pointing arrow button.
3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
     Reinstall the 10.9.2 update: OS X Mavericks 10.9.2 Update (Combo).
4. Reinstall Lion/Mountain Lion, Mavericks: Reboot from the Recovery HD. Select Reinstall Lion/Mountain Lion, Mavericks from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Reinstall the 10.9.2 update: OS X Mavericks 10.9.2 Update (Combo).

ITunes shut down after I drag my mp4 video to it, it is iTunes 10.4.1. Can anyone help?

iTunes 10.4.1 for Mac shut down after I drag my mp4 video to it. Can anyone help?

You may consider updating your iTunes to the latest version to fix bugs.
Download iTunes

My Mac shut down after the chime by itself! :(

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