IMac not COMPLETELY powering down...

Morning all...
I upgraded my 24" iMac (bought Jan 2007) to Leopard on Saturday, and apart from a few minor software funnies, it seemed to go OK. I just upgraded - not archive and install or anything complicated like that.
The problem I now have is that using the "Shut Down..." option off the Apple menu does seem to power off the Mac, but not all the way. If I press the power button to restart it, nothing happens. If I hold the power button in for 6 secs, then release it and press it a gain, the Mac starts up. I have a Synchrosoft dongle for Cubase plugged into one of the USB ports on the back of the Mac, and that helpfully has an LED activity light - which never goes out until I do the long power switch press thing; this seems to tell me the Mac's not disconnected itself from the power properly.
Anyone got any clues? Is this related to the MacBook power issues related elsewhere in these forums?
Dai

Well - it was a long time but I think I've got a solution; not a pretty one I'm afraid.
I solved the problem by doing a wipe and install of Leopard, and only bringing back documents only from a backup. Shutdowns now happen as expected, full power off, no fans running. Of course, this means that I have to reinstall all my apps and hardware and have very nearly finished that mammoth task. One big funny I had was with Cubase 4 - the installer wouldn't run, but digging around I found a solution. If you open the installer's package contents, you can install each bit separately - takes a bit longer but each bit isntalls ok - and then you can upgrade to Cubase 4.1.

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IMac 27'' keeps powering down for no reason

After about 2 hrs of editing sometimes my iMac 27'' keeps powering down for no reason and then rebooting.

If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter "BOOT_TIME" (without the quotes) in the search box. Note the timestamps of those log messages, which refer to the times when the system was booted. Now clear the search box and scroll back in the log to the last boot time after you had the problem. Select the messages logged before the boot, while the system was unresponsive or was failing to shut down. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). Please include the BOOT_TIME message at the end of the log extract.
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Anonymize before posting.
Step 2
Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the entire contents of the most recent one, if any. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.

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Hi,
If the HP Solution Center currently does not work, remove any device within Devices and Printers, then go to Start > Programs > HP > HP Officejet Pro L7500 and click on Add a Device.
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Say thanks by clicking the Kudos thumb up in the post.
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#*[http://kb.mozillazine.org/Kill_application Mozillazine - Kill application]
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#**[http://support.mozilla.com/en-US/kb/Basic+Troubleshooting Basic Troubleshooting]
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''

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Please stop the following processes from task manager, if running-
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Not bombing while we use it, it just goes to sleep, seemingly as usual, but after that it somehow shuts down.
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Hello, first post here.
I have an iMac which I powered down last night and came this morning to boot it back up. Unfortunately it was having troubles booting up. It got stuck on the blue screen, kinda switching back and forth between two shades of blue and occasionally displaying the mouse and spinning load icon.
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Hi J
Welcome to Apple Discussions
That sounds almost like a failed Leopard install:
http://support.apple.com/kb/TS1545?viewlocale=en_US
or it's Stuck in a "loop" at the login window after upgrading to Leopard: http://support.apple.com/kb/TS1413?viewlocale=en_US
Try an Archive & Install:
http://support.apple.com/kb/HT1710
or restore from your Time Machine Backup:
http://docs.info.apple.com/article.html?path=Mac/10.5/en/15638.html
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Hi Anythony ...
v10.8..2? Most reccent version of Lion is v10.7.4.
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It is possible that you got a bad bunch of caps agan, but it seems morel likely that it's the power supply as well this time. Replacing the caps, as you know, is not cheap, it's a fiddly operation, replacing the power supply isn't as bad, but it does cost a bit. You'll have to decide whether to bite the bullet and pay for repairs, or save up for a new Mac.

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Powering down external HDs on an iMac when shut down

Hi to all, hope you can help .....
I recently added two external WD Studio HDs to my iMac connected as a RAID1 array. This was done using the Mac disc utility and without any reference to the pre installed WD software. I also have a separate Studio HD as my Time Machine and since all 3 have a Firewire connection I daisy chained the cable to all 3 devices (the iMac only has 1 Firewire port) since I thought this would be the fastest option. All 3 HDs appear to function correctly, except when I power my system down the drives remain awake.
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Any ideas / solutions greatfully received, Cheers !!

Hi Roy,
I'd stick with Firewire. It's faster and I have always considered it more reliable. (It takes a technical discussion to explain why.)
There is no assurance that using USB will make your external drives power down. Again, I want to emphasize that not all drives will power down automatically when you shut down your Mac. Some drives do, some never do, and some have a 3-way switch that allows you to select the power-down behavior. And there may be something about your 2-drive software controlled RAID setup that affects things here.
The energy saver preference item for powering down drives whenever possible applies, I believe, only when the Mac is turned on and idle. (I do not believe it controls powering down external drives when you shut down your Mac.)
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We could not complete your iTunes Store request. The host is down - NOT iphone

Running 10.5.8 (Leopard) and keep getting this pop-up error on iTunes
We could not complete your iTunes Store request. The host is down. There was an error in the iTunes Store. Please try again later.
I'm running 10.5.8 Leopard on a G5 Quad Core PowerMac tower. Now I'm NOT even trying to access the iTunes Store - and it's more than just an annoyance - when the warning comes up it blocks out all local sharing until the error message is cleared away (which means manually going to the host computer that runs my iTunes for my home, clicking OK to make it go away, only to have it come back again.). I experienced the same issue on my other computer, a Mac Mini (Mid 2011) running Lion, so it's not the OS necessarily.
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I powered off the phone and reconnected with the same result. Is that what you meant?

IMac not COMPLETELY powering down...

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