Computer unexpectedly falling asleep

My almost brand new G5 iMac (using 10.4.6) has been randomly falling asleep every few minutes in a row. Of course, I have completely disablsed the sleep function and have no hot corners enabled and have restarted the computer every few minutes. This has happend about ten times in a row in a twenty minute period. Odd. Has anyone experienced this? Any solution?
Thank you!

A number of sleep-related issues can appear after incremental Mac OSX updates, including the inability to properly go to sleep, problems waking from sleep, and having your display go to sleep without your Mac going to sleep. The most common culprit is Bluetooth. Try these tips to fix your sleep problems.
WAKE UP
In System Preferences>Bluetooth, uncheck Allow Bluetooth Devices To Wake This Computer. If you are using a Bluetooth mouse and keyboard, you'll have to wake your Mac by pressing the power button.
FILE CORRUPTION
Your Bluetooth preference file may be corrupt-you'll need to delete it. Turn Bluetooth off, then go to the /Users/user name/Library/Preferences folder. Look for a file called com.apple.Bluetooth.plist and trash it.The OS will create a new preference file when you enable Bluetooth again.
ENERGY SAVER
If you have issues with a Mac or display that goes to sleep at inappropriate times, you may have a problem with Energy Saver. Delete the following .plist files and restart:
-/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
-/Users/username/Library/Preferences/com.apple.systemuiserver.plist--(username is your name or System Administrators name).
-/Library/Preferences/SystemConfiguration/com.apple.AutoWake.plist
A restart is very important after deleting these plists. After a reboot your Mac will then generate new ones.
Some, in these forums, have had luck fixing sleep issues downloading the Combo update from this site (yours may be corrupt), not Software Update, disconnect all firewire + USB devices except keyboard + mouse, Repair Permissions, re-install update, Repair Permissions again + try.
Yours would be the 10.4.6 Combo update. Others reading, download the combo update that applies to you!
Cheers!
DALE

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The phone is magnetic and is tripping the lid sensor.

My iMac G5 randomly falls asleep during use.

A few weeks ago I was using my iMac and suddenly lost control of the cursor, cursor became invisible and computer went to "sleep" (ie; screen went black, "woke up" a few seconds later after moving the mouse). This problem has persisted in all sorts of conditions and uses. Usually the intial episode is followed by another shortly after. The problem happens a lot while streaming video on the internet. However, the computer also falls asleep when using photoshop.
The problem began when the hardrive was nearly full (15 GB left on drive). I cleared out many of the larger files (lossless music files) to gain 87 GB or so. Problem persists. I mostly use this computer for typical web stuff (email, facebook, videos on youtube and the like) and graphic design (Illustrator and Photoshop). Hard drive had never been defragged. I usually restart the computer when problem gets really bad.
I've searched various forums for a solution. Many argue about defragging, some mention OS reinstall, no real clear consensus seems to exist about why the problem occurs or what to do about it. Any ideas?
Specs: Mac OS X, 10.4.11, 2.1 GHz G5, 1 GB DDR2 SDRAM

Your problem sounds more like a heat problem. Try resetting the SMU:
   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.
If that doesn't clear things up defragging won't do anything much, the best would be to try an
Archive and Install http://support.apple.com/kb/HT1710
which will give you s shiny new OS, but keep your prefs and settings. Make sure you select that option when reinstalling.

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I recently had an overheating problem and had the motherboard replaced in my T530. Now my computer randomly falls asleep. Most of the time this happens when I am on battery power or the computer is in my lap. To prevent more overheating I now have a flat board that the computer sits on when on my lap, but it still randomly falls asleep. The fan is working because I hear and feel it turn on and off from time to time.

In that case I would suggest contacting Tech Support, especially if the laptop is still under warranty.
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Click your Apple logo in the upper tool bar of your computer>Select system preferences>under hardware select energy saver>select NEVER under put the computer to sleep when inactive
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My MBA will often disconnect from the wifi while it's asleep --especially if I close the screen rather than leaving it to fall asleep with the screen open. I then need to go to the menu, find the home network, select it, and reconnect. It's not a big deal for me, but I can see how it might be for others.
Not sure if that's the same thing as what you have, but if it is, then yes, I have that problem too. And no, I'm afraid I don't know how to fix it.
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HT1657 I rented a movie on Itunes last night and I watched half of it before falling asleep. Today I tried to open the movie and watch the last half but I cannot find it. It has been less than 24 hours since I rented it. Where can I find the movie?

I rented a movie on Itunes last night and I watched half of it before falling asleep. Today I tried to open the movie and watch the last half but I cannot find it. It has been less than 24 hours since I rented it. Where can I find the movie?

I found my answer in another Thread and it worked... so for anyone who needs it, here it is:
https://discussions.apple.com/message/19134562#19134562
Had the same problem and spoke with Apple Support. They had me reset the System Management Controller:
Shut down the computer. With the computer off, on the left hand side of the keyboard press shift+control+option along with the power button simultaneously and release. Wait 5-10 seconds and restart the computer.
This solved my problem and I was immediately able to purchase, download, and play an HD movie from iTunes w/o any error message.

Dual G5 falling asleep again ramdomly, need help!!! DUAL G5 2.0gHz

I can't get any work done. I updated to the latest greatest OS that software update told me to do and now every time I try to work on anything processor intensive the computer fall asleep and I need to hit the escape key to wake it up. This will sometimes happen 2-3 times in one minute. I've posted on this problem several times in the last year and usually I've been able to get the machine running again. However this time nothing is fixing it. I've downloaded the combo update, trasted the ,plist files, reset the PRAM and cleaqned my cache, repaired permissions, booted from 10.4 install disc, run diagnostics, checked log files for thermal runnaway (never seen that one). Unfortunately this computer is about 3 years old now and all warantees and apple care have expired. It's had issues since the get go. I've had to replace the logic boar, case and one of the processors. I'm about to pay the 50 bucks and call apple but I was hoping that there would be a solution here first. Please help. My business is suffering...
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Try this again also. If you have issues with a Mac or display that goes to sleep at inappropriate times, you may have a problem with Energy Saver. Delete the following .plist files and restart:
-/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
-/Users/username/Library/Preferences/com.apple.systemuiserver.plist--
(username is your name or System Administrators name)
-/Library/Preferences/SystemConfiguration/com.apple.AutoWake.plist
A restart is very important after deleting these plists. After a reboot your Mac will then generate new ones.
Some, in these forums, have had luck fixing sleep issues downloading the Combo update from this site (yours may be corrupt), not Software Update, disconnect all firewire + USB devices except keyboard + mouse, Repair Permissions, re-install update, Repair Permissions again + try.
Yours would be the 10.4.8 Combo update. Others reading, download the combo update that applies to you!
Cheers!
DALE

PLEASE HELP! My MacBook Pro doesn't fall asleep

My MacBook Pro doesn't fall asleep on its own any more. Currently, my Energy saver is set so that the display falls asleep after 1 minute, and the computer itself, after 3 minutes. Even if I don't have any softwares running, or anything else, it doens't fall asleep. Please give me some suggestion about what to do about this! (or would I need to take it to a shop? ... )

Well, since the machine does properly sleep when the lid is closed, my guess would be that you have a software conflict and not a hardware problem. Since your are up to date, have repaired permissions, and can't remember anything else that may have changed, it could be difficult to track down the culprit.
One thing you can try, it takes a bit of work but will help show if software is the real problem. You could create a new user account, and don't install anything new in it. Log in as the new user, and see if sleep works there. Often as you use your main user profile, you accumulate software programs and utilities, and sometimes then can conflict with one another. If you create a fresh user account, often it will not have the same software conflict.
If the new account sleeps normally, then you can assume that you have a software conflict somewhere, and you should think through what you have installed. If the new user account has the same problem, my guess would be that something is out of whack with the OS, and you need to decide if a full system reinstall is worth it (that is a big decisions, don't just jump into it).
Regardless of the outcome, after you have used the second account for a test, you can simply delete it.
Cheers,
Josh

Macbook keeps falling asleep

Every time i turn on my mac, it keeps falling asleep. I press a button and it wakes up, and then for a second or two its up then falls asleep again.

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what i thought might be a partitioning error/issue might be another thing altogether... let's start from the top. lots of random details follow, but something might be the kicker.
i have an older AEBS (non-dual-band, non-giga-bit, circa 2007) in another room (garage -- with all of the other panels, switches, etc.) that distributes a signal to the whole house -- specifically to two airport express base stations (delivering music, printer sharing, etc.). the AEBS is sending out a G/N signal (for iphones, network cameras, etc.) and one of the expresses is sending out an N-only (for my macbook).
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over the past few weeks, i've been getting very poor throughput on the wireless network -- speed bumps back up (from <1bps to >20mbps) when plugged into the ethernet network (as viewed through speakeasy's speedtest).
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previously (as few as 5 weeks ago, i had a smaller lacie drive (1TB) serving the same function flawlessly.
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-- the AEBS not liking the 2TB size?
-- the AEBS giving signs of failure (esp. with the network issues noted above)
-- is the new lacie drive either (a) a DOA-failure or (b) doing its job by falling asleep (if so, it'd be a new 1TB>>2TB feature)...
-- user error
-- something completely random...
thanks for any wisdom you can lend...

I have pretty much the same setup with the same model AEBS and I get the same problem with a 2TB Western Digital drive plugged in. I solved this problem a month ago by updating my system to Snow leopard and updating firmware to the base station and rebuilding pretty much the whole network. But it came back this weekend. Is driving me crazy!
(Side note: I also use that drive as a wireless Time Machine backup but can only get it to work reliably with my wife's Macbook not my own- which actually worked for a weekend but then decided that was enough.)

Closing application when falling asleep

Everytime my MacBook Pro falls asleep, Firefox and all other open applications got closed and donwloading cancelled and I loose all my open web pages. How can I prevent this? Thanx.

apple really needs to come up with an update to fix this issue. i mean you may loose all your work just because your mac wants to sleep. I think this is really stupid of apple to not think about this issue. i think there should be an option to keep the mac ON while the lid is closed. And i also think that it needs a sleep mode like windows does, you know the one where computer does go to sleep but without closing all the applications so that we wont loose all the work that we were doing and had not been saved yet.

My iMac falls asleep too often

I have mutliple users on this iMac and while I'll try to listen to itunes, if I haven't been active on the computer for roughly 5 minutes, the iMac falls asleep.
Is it something in my settings?

If iTunes is still playing, then only the Display has gone to sleep which is OK because it will help to save energy and make the display last longer.
If iTunes stopped playing then go to: Apple > System Preferences > Energy Saver and set Computer Sleep: to Never.
Then adjust Display Sleep: to whatever time you want.
Personally, I sleep my displays to save on energy if I am not using them.

My original iBook Graphite falls asleep when just finished starting up.

OK, first, I was working on my ibook when my cat came up with spilling my coffe on my ibook, then I ran to the apple store and made them fix it at all cost, then they told me that the battery connector was ureparably broken, so I live with my mac always wired on, and changing the date and time every time I disconnect it, now, the real problem is this: I downloaded and installed the os 9.2.1 update for mi ibook, everything all right, then the message of restarting my computer appaered, it restarted all normal, then when it entered the multiple users window it just falls asleep, i can wake it up for about 4 seconds, then, asleep, there's no other symptom, the thingy flashes as normal, etc...
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HELP!!!!, I don't wanna throw my computer, I love it.
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P.S.
Sorry if I posted a question already posted, is just that there are like 2,002 questions and posts, so it would take a great time to look at them all.
ibook g3 original Mac OS 9.2.x
ibook g3 original graphite Mac OS 9.2.x

If you have another Mac, hook up your ibook harddrive to that and copy your files and data across and wipe the drive clean then do the updates respectively. Then you could transfer you data from the other mac back and it should work fine. I think it may be an extension conflict, it sounds as though it would originate from a power managment sort of thing. I haven't used OS 9 for more than a day when my ibook shipped until i upgraded to OS X so im sorry if the details are sketchy.
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Computer unexpectedly falling asleep

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