G4 restarts after shutting down

I have a G4 running OS 10.4.8 and everytime I shut down, it'll shut down then start back up again without me hitting anything. I've tried shutting down on different users to make sure it's not a system preference setting . I've tried going apple, shut down, and I've tried shutting it down using the button on the actual computer and it always restarts within 5 seconds. Any suggestions?

Hi
You could try unplugging any USB devices, especially the keyboard, to see whether it makes any difference. If you have an Apple Studio or Cinema display, you could also try disabling the display power button via the OS X displays system preference.
I seem to remember people have also reported issues in the past where by they've been able to start up and shut down G4s by switching on a walkie-talkie or similar device.

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Satellite Pro P300-05X restarts after shut down

Hi All,
I've owned my notebook (Satellite P300/05X, Processor P8600 (2.4GHz), 17" Display) now for 1 week and I have been very frustrated with this problem I'm about to explain.
After selecting "Shut Down" option (not "sleep", not "hibernate" etc, but definitely "shut down"), the notebook goes through the steps of shutting down, and then all the lights on the touch finger pads turn off, and then the light from the main switch turns off. And then for no apparent reason, the notebook starts up again like as if I've pressed the switch back on! This morning was the worst, I went through the steps of shutting down 3 times! before it actually switched off...very frustrating especially if you're in a hurry.
Also, I have noticed occasionally the main switch light does not go off at all, all other lights do however, but not the main switch...and then all of a sudden, the machine springs back to life!
Now this problem is very random and does not happen all the time. On average it will automatically restart on, say 1 out of 7 times (except this morning!!!).
As I've said, this machine is very new. It has Vista Business, and I have installed only a handful of programs (Eclipse/Java, MySQL...that's pretty much it). And I'm very sure it's not a virus, nor malware. Plus I have not changed any BIOS settings.
But I have turned off all power options in the Control Panel (that is, "never" turn off hard disk etc etc).
Any ideas??
Thanks a lot guys....

Have you connected external devices to the notebook like printer, external HDD and so far?
Disconnect them because this could maybe cause the issue.
Make sure that you have wake up on LAN in BIOS and Windows disabled and you should also disconnect the LAN cable and other cables.
Check this and try also to update the BIOS.

Lenovo S510P restarts after shutting down

This problem is not the natural OS problem where an application resists the machine from shutting down and hence the machine restarts...
This is differemt..
I had posted on this community earlier too, but no one seems interested to reply to my post..
Its high time to take some bold steps because its almost 10 months (my laptop is just 11 months old) that i am facing the same problem and no one from this community or even the customer care people are able to solve the problem.
If you are not able to solve the problem please atleast exchange the machine..
THE PROBLEM THAT I AM FACING IS DESCRIBED HEREWITH:
When I shutdown the laptop, the laptop starts automatically after 2-3 sec(it does not restart) after it gets switched off completely(the white led light on power button is off). This scenario is different from the normal restart where the led light is on all the time. Here, the led light goes down(turns off) which means that the laptop is turned off completely, but suddenly after 2-3 sec the laptop starts again..
I am facing this problem from the second month of purchase. I am using DOS system, with 64 bit Win7. I have formatted OS a couple of times.
I was asked to replace the motherboard of the laptop by one of your Customer Service Centre, and I did so, but the problem is not solved. Although i have started facina a new problem of heating. The laptop heats up quickly and the laptop has restarted due to generation of extensive heat couple of times.
The laptop is currently in the Lenovo Customer Care since last 5 days for the above mentioned reasons.
Serial Number of my laptop is **********
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I feel sorry that I trusted Lenovo for their technology and their support..
You can view my earlier post in the following link:
https://forums.lenovo.com/t5/Lenovo-U-and-S-Series-Notebooks/My-Lenovo-S510P-Restarts-every-time-i-S...
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Hi
You could try unplugging any USB devices, especially the keyboard, to see whether it makes any difference. If you have an Apple Studio or Cinema display, you could also try disabling the display power button via the OS X displays system preference.
I seem to remember people have also reported issues in the past where by they've been able to start up and shut down G4s by switching on a walkie-talkie or similar device.

IMac restarts after shutting down?

Every time when I shut down my iMac it restarts automatically, why is it happening?

Hi, tough to tell, but...
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...
http://support.apple.com/kb/HT3964
Still no diff...
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons

Mac pro restart after shut down

hey i have mac pro 4.1. i have 10.9.1. and always that i press the "shut down" the mac just doing restart. i tried log out and press shut down but still restart. need fix..
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I kept having this problem until I noticed my Apple trackpad was running low on battery power. Since replacing the batteries I have not a single random restart. (Of course, when I shut down later it could reappear just to make a liar of me!)
So...could it be a Bluetooth issue - polling with low battery power or some such?

Mac mini restarts on its own after shut-down.

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Any suggestions how to stop this?

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Losing Desktop Items/Documents after shutting down and restarting

Twice, over the last couple of months after shutting down and restarting my macbook, everything on my desktop gets deleted, and it seems all the settings go back to their original form?
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Message was edited by: jram1111

Hi, I had this problem and it was due to setting file vault in the security settings. I removed having that set and then I had to go into system settings, Account and under Login Items, add back items such as mail and things that required passwords that were not coming up on my dock after each time I shut down.
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My iMac screen keeps showing pixels of previously opened documents and Safari tabs and hour or two after closing them. The shadow of those opened documents are still there hours later after shutting down and restarting my computer. What is happening

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Even when I swipe to the dashboard the outlines are still there when I know they should not be.
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What is happening and what shall I do? Thanks in advance.

Not much to go on in your product info, but maybe this will help: iMac (27-inch): AMD Radeon 6970M Video Card Replacement Program. If not, then it's time to visit an Apple repair station.
27" i7 iMac (Mid 2011) refurb, OS X Mavericks (10.9.4), ML & SL, G4 450 MP w/Leopard, 9.2.2

Photoshop won't open after shut down and restart. Any ideas?

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Feezing after Restart or Shut Down commands

Perhaps this is a common problem, as I have seen it happen before, but I have a Mac G5 in my lab that, after being told to restart, or shut down, the icons disappear like normal, but it just sits there with the desktop background up. No shut down, no restart.
I can restart manually by holding down the power button, but this machine is the master image for the lab and has to be able to shut down by timer, due to our college's "green" policies. If it won;t shut down on it's own, and has to be done manually, it defeats the purpose.
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The power functions of the machine are controlled by the PMU/SMU.
A reset may be what is needed.
http://support.apple.com/kb/HT1939
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Satellite L doesn't boot up after restart or shutting down

Hello,
My laptop after restart or shutting down doesn't starting.
I need to turn off the computer and wait 10 seconds and try again, after that it start ok.
Any suggest?
Thanks,
Dvir

To be honest I dont know if there is the problem actually. Most important thing is that your notebook starts. I dont know if this is so important if this happen after 5 or 10 seconds.
We dont know which notebook model do you have, how old it is, since when you have noticed this strange issue, so it is not easy to understand the problem.
>My laptop after restart or shutting down doesn't starting.
It is not easy to understand this statement. Does it mean that when you click on restart or shutdown option in start menu notebook react properly but cannot restart or be switched on immediately?

MacBook won't restart or shut down after upgrades

A couple of days ago I downloaded and installed updates from software-update (including a security update). I had to restart my computer, and everything worked. Later that day when I wanted to shut down my computer, nothing happened. I haven't been able to restart or shut down my macbook since then.
I used Disk Utility to check my hd and this is what I found:
(I translated it, may not be entirely accurate!)
Verifying volume 'Macintosh HD'
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invallid block count for file 'Temp File'
(It should be 7 instead of 0)
0
file %@",1)
Temp File 1
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Invallid count of threadrecords
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Volume Bitmap needs minor repair.
Checking volume information.
Invalid volume free block count
(It should be 3425346 instead of 3425338)
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS-volume checked
Volume needs repair
How can I repair my hd, knowing I can't reboot?

Welcome to Apple Discussions!
Backup your data first since you still have access to it as my FAQ* explains:
http://www.macmaps.com/backup.html
Once that is down, force restart it by removing both the battery and power cord and repair the disk with the original installer disk that came with the MacBook:
http://docs.info.apple.com/article.html?artnum=106214
If that can't repair the Mac, you may need Alsoft Disk Warrior.
* Links to my pages may give me compensation.

Is fully locked i cant restart or shut down.

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.is fully locked i cant restart or shut down. After I connected my iPhone 4s itunes you a message appeared asking if I want to upgrade to iOS 8. I say yes and then downloading it another message appeared saying that an error occurred and then iPhone mi died and showed the screen to connect it to itunes, when I connected , it showed on the screen to update , I accepted and my screen updating but gave an error and caught everything , I can do nothing and is not updating .

IE had unknown error and after shut down laptop screen is blank

HP Pavillion dv6t Select Edition Customizable Notebook PC # A2Z58AV
Windows 7
IE popped up with a message that there was an error. No other explanation. After shutting down and rebooting, the laptop screen is black but has power.
No changes made to operating system before this occured.

Hi @devitojj
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that when you power off your notebook it automatically restarts in 4 seconds.
You have tried several steps to try and resolve this but there is no change.
As it repeated the behavior with the hard drive removed, you know it is not an issue with Windows.
You have tried updating the bios and returning it to bios defaults but no change.
Here is a link from answers.microsoft.com that helped other people with this issue.
Windows 7 computer restarts automatically after shutdown
This does suggest you edit your registry which does have the potential to cause issues, so be very careful. I would also suggest backing up your registry before you attempt it, just in case.
Back up the registry from Windows.microsoft.com
If that has not helped, I would try removing the Cmos or RTC battery for 30 seconds and then replacing it.
Please let me know if this helped.
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

G5 won't restart or shut down or change startup disc...

(after several updates) my computer won't restart or shut down except manually... which prevents me from changing the startup disc (where all my important stuff is). Option key during startup doesn't give me the startup disc option either.
I'm stuck!
I verified and repaired permissions on both volumes, but can't switch back to the hard drive/OS I need.
If anyone can suggest some helpful info I'd really appreciate the help.

Hi-
Are you using an Apple keyboard? If not, please do so while troubleshooting.
Try resetting the PRAM. Hold CommandOption+PR while starting up. Hold the keys until you hear the second startup chime, then release. The machine should then boot normally.
If this fails to return function, a PMU/SMU reset may be required.
There is a possibility of damaged files within the OS. Boot to the OS install disc, open Disk Utility and run Repair Disk on the Startup volume.

G4 restarts after shutting down

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