IMAC Powering Off!

i am having issues with my Imac Powering down. i have had a tech review my computer and they say nothing is wrong.
current config is 20" Imac G5 Intel Core 2 Duo with most recent OS.
30" Apple Monitor run through DVI adaptor
Epson Photo R2400 via Firewire
original keyboard and mouse
has happened several times, do i need to have the firewire and usb cables for the monitor plugged in as well to assist in powering it?

PacNW, there is a service extension on the iMac G5 power supply. I am not sure based on your post what the issue is exactly, but check this:
http://www.apple.com/support/imac/powersupply/repairextension/
As for veichh, post in the other part of the forum that is based on "configurations" as well as networking, etc...
http://discussions.apple.com/forum.jspa?forumID=1111
Someone may have some knowledge about your printing issue.

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IMac powers off during DVD playback, why?

Right now, since the last update and my Applestore repair, by iMac powers off everytime I watch a DVD. Doesn't matter which player, I've tried Front Row, DVD Player, VLC, and Realplayer. It will play for 30seconds - 5minutes, and then power off. No error message.
My drive completely failed a few weeks ago, so I brought it to the Apple Store. They held it hostage for over a week and replaced the drive, the drive cable, and the "smart board" or whatever they called it. Upon return the drive works as expected... except this issue.
I run my business from my Mac so I want to make sure there isn't a simple way to fix this before I go back into the Apple Store (1 hour away).
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Hi, cannot tell you why..call AppleHelp (USA 1-800-275-2273)....L

After Mountain Lion install, my iMac powers off instead of just going to sleep. Help? Thanks.

After I installed Mountain Lion on my 2009 iMac, it will power off after I don't use it a while. It used to just go to sleep, I'd shake the mouse, and it would come back up. Now it powers off and I have to power it back up every time.
My Macbook has NOT had this problem since Mountain Lion install. It is fine.

Do these resets to clear errant commands:
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
The 5 second timing is important to a successful reset.
PRAM RESET
Zap the PRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

Imac powering off by itself

Hello,
This week my G5 20" iMac began powering off by itself. The CPU temperature is steady at around 70˚. I removed the back panel and cleaned the dust from all vents and fan ducts and it still powers off unexpectedly.
Serial number: QP527011T9U
Will anyone make suggestions or recommendations of how to repair this issue?
Has anyone else had this problem? edit...looks like I am not the only one. I did not purchase apple care so I fear this may come out of my pocket. I hope not though. I just want it fixed!
Any help is much appreciated.
http://www.GlacierAmps.com

Get yourself a firewire external drive, at least as large as your internal drive, then download SuperDuper!, which will make an exact bootable clone of your system. You can schedule automatic back-ups, and then be secure in the knowledge that whatever happens to your drive, you can have the contents at your finger tips. SD! also makes incremental back ups, changing on the clone only the data that has changed on your computer. This makes the backups (after the first one) very fast.
Hope this helps,
Miriam

IMac powers off in sleep mode after Mountain Lion installation

After I installed Mountain Lion on my 2010 iMac, it will power off after I don't use it a while. It used to just go to sleep, I'd shake the mouse, and it would come back up. Now it powers off and I have to power it back up every time.
My Macbook has NOT had this problem since Mountain Lion install. It is fine.

Try doing a smc and pram reset.

Can I use home sharing for AppleTV with Time Capsule and have my iMac powered off?

I wish to be able to use AppleTV without having my iMac powered on. Is there a way to have my iTunes library on my Time Capsule so I can use AppleTV directly from it?

I use an external hard drive with my iMac and have an iTunes folder there (that sometimes it points to automatically, but sometimes I have to go under advanced and show the iMac to use that iTunes folder because it defaults to the internal iTunes folder on the computer).
Make sure the external drive is powered on and mounted on the desktop before launching iTunes.

Late 2007 iMac powering off randomly

Ok, so I made a thread a year ago about this problem. Basically, my iMac about eight months after purchasing it (on the 13/10/07), started randomly shutting down and restarting. After a few months, it then couldn't be powered up at all. I sent it away to be fixed under warranty (2/10/08), the repair diagnosis claiming it was a faulty PSU. After about another 4 months of operating the computer with no problems, the exact same problem has arisen again. I've tried all suggestions on the iMac support site and they only work very temporarily.
I had heard that Nvidia had made faulty chips for computers around this time. Could this potentially be the problem? I don't want to spend $320 on a new power supply to find that the exact same problem will occur a few months after repair.
My model number is: MA877X/A

What I'm referring to is the power coming into the house from your local power company. Sometimes this power fluctuates and has small spike that may not be seen on other devices such as blinking 12:00on your alarm clock. This is why a lot of people us a UPS (Uninterpretable Power Supply) to safe guard not only from storms but from power spikes from the locally supplied power.
It is not rare for this to cause power supply problems in Mac or PC's. Is it your problem maybe not, but as you said... two power supplies one right after another... well it's something to think about.
And yes it could be the power cord:
http://support.apple.com/kb/TA27217
May not be frying the Power supply but may be the cause of current problems.

IMac powered off while in use and won't power up, surge protected

iMac DV suddenly lost power while in use and will not power up. I've played with the power cord and reset button etc. but it's as thopugh it died of old age. Any ideas? Could it's internal battery cause this ? Where is it?
Is there a way that I can download from the hard drive without power?

Before you trash the Imac, I would get a new internal battery and try that and if that doesn't work I would try to get a new power supply, that sounds like the problem.
Also if you have another mac you can take the hard drive out of the dead Imac and put it into the other mac and get your important files off of it. HTH,Aaron

IMac Powers Off During XP Install

Hi,
I've had a search of the forum, but couldn't find any issue like this.
Basically, during the XP install, my iMac will power off without any warning. I've tried re-creating the BC partition, carrying out the install with only a keyboard attached, even using two different XP discs ( one of which I used to install XP on my MacBook ).
Anyone else had this happen?

Just thought I would post an update for this, as I've managed to get XP installed.
It took several attempts to get as far as the first reboot. Once I had done that, I booted back into OSX, and installed MacFUSE/ntfs-g3. I could now mount the BootCamp partition read/write. I copied the i386 directory from the XP CD, to the BootCamp partition, ejected the CD, and then rebooted.
With no CD in, setup prompted for the location of the i386 directory; I pointed it at C:\i386. The install progresses, and then it will prompt again. This time, I put the CD back in. The install carried on without issue.
I then un-installed ntfs-3g, and MacFUSE....
Hope this helps...
J

Imac g5 (no iSight) - powers off randomly, please help!

greetings!
my imac g5 (approx 2.5 yrs old) has recently started to power off all of a sudden while i'm working on it. after it powers off, i am not able to turn it back on until after approximately 10-15 minutes.
i'm thinking about taking it to the apple store for help unless someone can advise or provide some thoughts on why it may be doing this and what i can do to prevent it.
thanks.

http://docs.info.apple.com/article.html?artnum=300908 Troubleshooting when your computer won't turn on
http://docs.info.apple.com/article.html?artnum=86817 iMac G5: Loose power cord could cause power loss
If none of the suggestions in this thread are of any help, then you need to provide more details about your comp.
Which "model" & "generation" G5 iMac do you have?
Need this info so that the knowledgeable users can provide you with the proper troubleshooting solution(s).
http://docs.info.apple.com/article.html?artnum=301724-en How to identify your iMac
http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh355.html Getting information about your computer
You can have this info displayed on the bottom of every post by going to 'My Settings' which is located in the column on the right under your name, and filling in the information asked for.
Thank you

Can my USB Drive be configured to power off when the iMac is powered off?

I am using a Lacie 500GB external USB drive. The drive remains powered on when my iMac is powered off. Is there any way to have the drive automatically power off?

Hello Jack
The s.o.p. for shutdown should be to eject the drive, turn it off then shutdown the iMac. The s.o.p for startup should be to startup the iMac then turn on the external HD. Many external HD manufactures do support a sleep function that allows the drive to sleep when the iMac is sleeping.
Dennis

My Imac 2.0 GHz Intel Core Duo keeps powering off

Hi all,
I have a 20inch 2.0 GHz Intel Core Duo (Imac 4.1), Over the last few weeks the Mac would just power off on the odd occasion when using Apeture, I put this down to being the just overworked for processing picture. This seems to have been getting worse and kept occurring more and more often. Light Internet browsing was fine..
I decided after some time to replace the 2gb memory i had to see if that would fix the issue, this seemed to work for a few days then the same issues returned.
I now seeing this issue occured just by opening Safari and decided to rebuild the Imac, I completed the Snowleopard install and all seemed ok for a day then it re-occurred again and seemed to be worse, I then removed the 2gb memory and just kept with the 512mb as when bought... Still it keeps powering off. I have moved to different power sockets and still see the same issues.
Please note in order to power the Imac backup up I have to leave the power out for about 20-30 minutes, If i leave the power plugged in it never boots backup up.
I now decided to even revert back to Lion OS, but it just powers off during the install...
I thinking it sounds like a Power supply issue but would like confirmation before I take it to a repair shop..
cheers
Dan.

As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...
You are now in a perfect position to do a
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
It is the 5 second timing that initiates the reset.
Here is a link to a Widget to monitor your temps and other operations:
http://islayer.com/apps/istatpro/

IMac G5 powers off

I have an early version iMac g5. It shuts down (powers off) by itself and to restart I have to unplug it, hold the power button in for a few seconds, plug it back in and maybe it will restart then it will shut down again. I have changed the BIOS battery but no help and reinstalled the OS.
Is this a memory issue or a power supply issue? I have done research on the Web but cannot come to any decent conclusion.

As a new user I'd recommend bookmarking and reading Mac 101 & Find Out How Video tutorials .
I would also recommend doing both a SMC and PRAM reset:
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

IMac, update causing black screen and randomly powers off...?

I've seen many comment on this with few solutions. It had never occurred until yesterday afternoon after the latest security update for Mavericks, 2014-005 v.1, was loaded and the system was rebooted. After that moment the mac has been unusable. It will start and after user log on, will black screen, sometimes still running and other times instantly powered off. I have followed resetting the PRAM, and SMC procedures with no change and have booted into safe mode in order to examine the system and it is just as unstable there. The times I have gotten it booted and running, attempting to access an earlier Time Machine backup, but before I can start reload it goes black. The same goes while trying to check the sleep mode and security settings. Unless this is an amazing coincidence, I believe the latest update has caused this problem and has for others as I have seen on many conversations. Can this be uninstalled or does the drive need to get wiped and then reload from the Time Machine?
Thanks.
iMac, A1311 21.5" Mavericks 10.9.5 Update 2014-005 v.1

Well, initial call into Apple Care and one answer. "We have no idea what it is, we can get you an appointment at a Genius Bar in 4 days!" 4 days?! Seriously? At least they were kind enough to only put me on hold for 30 minutes, AND then transferred me to a "Sr. Care Specialist" who basically blew smoke up my arse only to tell me the same thing... why transfer me at all?

Powering off firewire ports when imac is off!

hello,
i was wondering, is there a command line or something else to configure the firewire ports on my imac so that when my imac is turned off, power doesn't continue flowing to my firewire 800 hard drive as well as my firewire 400 audio interface??? thanks

24” iMac 2.8 GHz Intel Core 2 Duo OSX v10.5.5 shutdown anomaly.
It appears that the iMac does not truly shut down, the Firewire 400 port cycles on so that a hard drive attached to the port will turn on.
I took readings with a digital ammeter/powermeter attached to the iMac power cord.
The reading with the computer shut off read 5ma (0 watts on the wattmeter) cycling to 180ma (5 watts) for 1 second duration. This cycle repeats 23-24 times a minute. Unfortunately, this is enough to activate my One Touch Maxtor 500GB hard drive attached to the Firewire port. The readings with the iMac in the sleep mode were the same, so it seems shutting the computer down at night really doesn’t save any electricity. Attaching the Maxtor to the USB port does not turn on the hard drive when the computer is shut down.
I have seen other support group threads complaining about Firewire drives turning on when the computer is in shut down mode and the cause is generally accepted to be an active Firewire port.
Since my Maxtor doesn’t have an on/off switch, the best solution I have found so far is to use my APC 750 UPS to turn off the Maxtor. This APC has a master plug outlet that senses when the computer is turned on and activates 3 other outlets to on when the computer reaches a certain power threshold. Fortunately the threshold is user adjustable and I was able to set it high enough to turn off the Maxtor outlet when the iMac is off. This really doesn't solve the problem, I guess Apple will have to fix that, but it is a work around to all those HD lights.
Is anyone else able to confirm that their iMac cycles like mine does, or is this peculiar to my iMac? It is new and if it needs service I would prefer to do it while it is covered under warranty.
Mike

IMAC Powering Off!

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