IMac display turning off again 10 seconds after system wake

Ever since I've updated my 27" Late 2009 iMac to Lion, I'm observing a strange behavior when waking the machine from sleep:
It wakes up normally, spinning up the harddrive, turning on the display and responding to input just fine.
Then roughly 10 seconds after the wake, the display suddenly falls asleep (turning off) but the machine itself stays awake
I can get the display back on without issue by clicking the trackpad.
This consistently happens when I wake up the iMac.
I usually put it to sleep using the Cmd-Alt-Eject keyboard shortcut. Wake on network is on, so it will have been through a few RTC wake cycles by the time I wake it up from the keyboard.
Is anybody else observing this behavior?

Still happens every day after updating to 10.7.3
Is nobody else seeing this behavior?

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IMac display turns off automatically.

Hi everyone!
I have a problem with my iMac. The display automatically turns off while using the computer and I can't continue using it without forcing it going to sleep. The display turns off when the screen brightness is NOT at maximum level. If I reduce the brightness, the screen turns off. If the display it's at the maximum level, no problem, works perfect. No matter if the computer is just turned on from a cold start or if it's running since hours with high temperatures. In System Preferences there's only one option selected in the Enegy Saver section (Allow power button to sleep the computer).
Any ideas? It's really annoying working with this problem (especially at night with the brightness at maximum).
Hope somebody can help me!
(Sorry for my english).

Hi everyone!
I have a problem with my iMac. The display automatically turns off while using the computer and I can't continue using it without forcing it going to sleep. The display turns off when the screen brightness is NOT at maximum level. If I reduce the brightness, the screen turns off. If the display it's at the maximum level, no problem, works perfect. No matter if the computer is just turned on from a cold start or if it's running since hours with high temperatures. In System Preferences there's only one option selected in the Enegy Saver section (Allow power button to sleep the computer).
Any ideas? It's really annoying working with this problem (especially at night with the brightness at maximum).
Hope somebody can help me!
(Sorry for my english).

IMac display turns off but computer doesn't sleep.

After upgrading to Mavericks I've noticed a problem where my iMac display will turn off but the computer will never enter into actuall sleep mode, I know this because I can constantly hear the fan humming. I have the Energy Saver settings set to sleep the display after 10 minutes and sleep the computer after 15 minutes. However even well after 15 minutes of inactivity (and the display long having turned off) I can still hear that the computer is not sleeping due to the fans still being on.
I decided the troubleshoot the problem using a Terminal command and I was able to narrow it down to single potential cause. According to "PreventUserIdleSystemSleep" the problem stems from a "URLConnection in progress" issue. How does one go about determining what is causing the URL Connection so I can kill the prompt and see if that solves the sleeping issue?
Here's a screen shot of the Terminal output:
Also, if I choose "sleep" from the Apple Menu, the iMac will go to sleep as normal (fans and harddrive sleep).

Reset the SMC and the PRAM.
Reset the SMC
• Shut down the computer.
• Detach the computer's power cord.
• Press and hold the power button for 5 seconds.
• Release the power button.
• Reattach the computers power cable.
• Turn on the computer.
Reset the PRAM
• (Re)start the computer
• Immediately press & hold the CommandOption+PR keys
• Wait for two startup chimes
• Release the keys and allow the computer to boot.
Dah•veed

My iphone 4 died even though it had plenty of battery, and shows no sign of life until i put it on to charge where it shows the apple sign every now and then but just turns off again after a few seconds.....HELP!!!!

my iphone 4 died even though it had plenty of battery, and shows no sign of life until i put it on to charge where it shows the apple sign every now and then but just turns off again after a few seconds.....HELP!!!!

Could be a defective battery, you should get it checked by visiting an Authorized Apple Service Provider or Apple Store next to your place.
Find an Apple Authorized Service Provider

My imac G5 turns off on mi then dont want to turn back on at all but after one day turns on mormaly then turns back off again

my imac G5 turns off on mi and dont want to turn back on at all but nex day tuns on normaly then tuns back off again

It could be several possible issues.
1) Your G5 iMac could be overheating. Depending on which model, you might be able to open the back by yourself (not on an iSight model), and using a can of compressed air, youcould blow the dust out of it.
2) The power supply could be going bad.
3) The hard drive could be going bad.
There could be several others.
If you have the original, came with the iMac when purchased new Install Disks, you can try running the Apple Hardware Test to see if it can determine any hardware issues. It can't always find the problem.
Good luck.

T42 Display turns off after moving

Hello everybody!
I´ve got a problem with my Thinkpad T42 (2373fwg), XP prof. with the latest updates running. After installing the latest drivers for display (ati) and for "ThinkVantage Active Protection System " the display turns off immediately after moving the Thinkpad. I can turn the display on again only by reboot. The error appears even in a second after reboot, so it doesn´t concern to windows. The system doesn´t crash, it´s only the display. The problem might concern to the shock sensor, but I don´t know how to solve it.
Does anyone of you has an idea?
Thank you and kind regards
Bill
Message Edited by billyflinn on 01-26-2009 09:29 AM

I have a similar problem: T42 (2373-5wg) Screen blanks. At first screen blanking was rare and seemed to happen when moving the pc, but now the screen blanks within 1-3 minutes after turning on the laptop, even if the computer is left untouched after being turned on.
It is not OS related as the blanking appears even when in BIOS setup or booted on a liveOS CD.
I can't tell for sure if the system crashes or not as the display goes blank (doh!), however, I have seen no reports of registered crashes in the visible part of the boot process.
The screen blanking appears quicker (or even instantly) if the computer is warm (e.g. turned off just before being turned on).
Blanking appears simultaneously on the LCD and on any attached external monitor, so I believe this rules out a defective LCD, backlight or inverter board.
I'm thinking it's a failing graphics adapter or system board, or maybe a loose connection that causes a component to overheat and fail. But I don't know which or how to fix it.
It IS out of warranty, of course. Any ideas?
Thanks in advance,
Niels
EDIT: It seems this could be yet another case of badly soldered BGA chips that seems to be troubling the T4x series:
http://forum.thinkpads.com/viewtopic.php?f=2&t=33952&sid=99545e4d13d9a94ce7496a5022690ed8&start=30
http://www.technotaste.com/blog/thinkpad-t42-ati-radeon-9600-driver-and-the-blue-screen-of-death-bso...
Message Edited by NielsCN on 01-26-2009 12:11 PM
Message Edited by NielsCN on 01-26-2009 02:25 PM

Display Turns Off After Opening Computer

I have a very annoying problem of my display turning off and not turning on until I restart my Macbook Pro by holding down the power button.
For example, I will close my computer (power cord not plugged in) and it will go to sleep. If for some reason the computer turns on while it is still closed (this happens when I pick it up/move it around sometimes) and I then open the computer, the display will be on momentarily and then turn off leaving me with a black screen. The only way to turn the display on again is to restart my computer.
Another example: I might close the computer with the power cord in. I will then unplug the computer (still closed) and walk somewhere, then open the computer. The display will be on for a few seconds and then turn off, leaving me again to restart my computer.
The third example is the worst. Sometimes with the power cord still in, sometimes with no power cord, the display will just be blank when I open the computer.
With all of the above occurrences, I know the computer is running because I can see the caps lock key light change when I press it.
Does this make any sense? Please help me, I will be going to college on Tuesday and I would really like to have it so I don't have to restart my computer every time before class.
My display was not always this way, it has just been like this for a few months.

Im surfing this kinda of problemes. Its insteresting your computer turn on the screen after restart, but there no much good news for us in here: http://discussions.apple.com/thread.jspa?threadID=1478474&tstart=0

Yoga display turns off after 1 minute

I'm having an annoying problem with my new Yoga related to the display and have not seen any other posts with a similar complaint so perhaps this is a simple fix that I'm just not able to sort out on my own. My display turns off after 1 minute of inactivity. The only means for changing behavior like this that I am aware of is through the Control Panel Power Options. My settings for "turn off the display" are 10 minutes on battery and Never while plugged in (note screen shot attached). Regardless of my settings, the screen turns off after 1 minute. I've changed the settings to multiple configurations and restarted with no change in behavior. Perhaps there's some other settings area, maybe something specific to Lenovo that I'm not aware of (since this is my first Lenovo laptop). Anyone with similar problems or insight?

This may be a Windows 8 issue. I finally fixed this problem by identifying the screen saver as the issue (and I wasn't using a screen saver). Type "lock the computer" into the search box after clicking the search charm, which brings up the screen saver dialog box. Mine was set to 1 minute, though I'd never set it myself. If you can't change it, choose a screen saver and you should be able to do so (and can then switch back to no screen saver). BUT, here's the problem. Other things you install (or settings within things you install) can apparently change and override whatever you type in for the delay time. Try applying your new time and exiting from the dialog box, then open it back up again. I was finding that it kept going back to 1 minute. To reset things so that you can get control again, type "user accounts" into the search box and when the dialog box comes up, choose "Reset Security Policies". Then you can go back to the screen saver dialog and successfully change the delay time. See http://social.technet.microsoft.com/Forums/windows/en-us/ace4085a-b0ba-4a98-898d-cd92d9e88e13/window... for some detail.

L305D-S5935 Unresponsive After Display Turns Off

I have a L305D-S5935 running Windows Vista and it becomes unresponsive after the display turns off as set to do so in the power settings. I cannot push any key or button or move around on the mouse pad to get it to turn back on. This is very frustrating and the only way to get it to come back on is to to a hard restart.

Turn off your laptop, unplug all wires, remove the battery, and hold the power button for thirty seconds. Afterwards, reattach the battery and connections.
Then reinstall TVAP.
Toshiba Value Added Package for Windows Vista/7 (32)(v1.2.33; 11-09-2009; 43.67M)
- Peter

While in email today, the computer began flashing. I had to turn off with button. When I turned it back on, I got the apple icon and the moving loading wheel. It would turn for about 60 seconds and then stop. I turned off again. I now have a black screen.

while in email today, the computer began flashing. I had to turn off with button. When I turned it back on, I got the apple icon and the moving loading wheel. It would turn for about 60 seconds and then stop. I turned off again. I now have a black screen.

Hi wiesenruth,
If you are having issues starting up or booting your computer, you may find the following articles helpful:
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
Regards,
- Brenden

My mac pro suddenly turned off by itself, then after 10 minutes it started to work again with "no battery available" icon and an always-running fan!

My mac pro suddenly turned off by itself, then after 10 minutes it started to work again with "no battery available" icon and an always-running fan!
it's bugging me since I don't know if it's recharging or not..

Mine has just done this too. Did you find out what it was?

My macbook pro shuts down and doesnt let me turn it on after a few days i try to turn it on and it works but then after a few hours or so of using it it turns off again and the cycle of me waiting days to turn it back on happens again whats the prob?

my macbook pro shuts down and doesnt let me turn it on after a few days i try to turn it on and it works but then after a few hours or so of using it it turns off again and the cycle of me waiting days to turn it back on happens again whats the prob?

If you haven't already done so, try this simple step first.

White Stripes/Display Turning Off

Last night I noticed a bunch of white stripes flicker for about a quarter of a second on my display. This happened multiple times. I shut it down with no problems.
Today I had no problems until everything froze. I could move the mouse, but it would not change from a text cursor. I manually shut it down.
I turned it back on, after a few minutes I had the same issue.
I turned it off manually, unplugged the power for about a minute, plugged it back in and turned it on. After a few minutes the white stripes flickered. I decided to back up everything. After about 10 minutes, during the backup process, the screen went black. I could feel that the computer was still on, but the display was black. I manually turned it off.
I have now been on for about 30 minutes with no problems. The computer was very hot when the display went black. Is it possible that this is an overheating problem?
Any suggestions?

The iBook has a seperate display dimming (display turns off) and sleep mode timers. Go into the system preferences>energy saver to set these preferences. When your display turns off you should be able to reawaken it by pressing a key on the keyboard. Turning it off is not the best solution. If the problem happens while you are still using it or it doesn't awaken when you hit a key then you may need to post here again.

My mac pro wont open up. I press power on and it begins loading woth bar filling up and when is complete. it turns off again. Help!

My computer was running slow so i turned it off. Now it wont turn on. I hot power and begins loading the bar. once full it turns off again.

Computers that ran Tiger do not run Mountain Lion.
Leopard is the oldest that an eligible Mac Pro would have shipped with in the Early 2008 3,1 with 10.5.1+
Internet Recovery does require a disk drive and free space to setup and hold the download and to initiate an installation. Haven't done so so I don't have first hand as to all the t hings that can and do go wrong.
When you do have the installer package, and BEFORE you run it, SAVE IT SOMEWHERE SAFE!
How to make your own bootable OS X 10.9 Mavericks USB install drive
http://arstechnica.com/apple/2013/10/how-to-make-your-own-bootable-os-x-10-9-mav ericks-usb-install-drive/
When Apple released OS X 10.7 two years ago, it stopped selling operating system DVDs in its stores, stopped shipping recovery disks with new Macs, and switched to downloadable installers for OS X upgrades. These download-only installers have actually worked pretty well—I’ve never had an issue downloading the software from the Mac App Store or restoring a Mac using the Internet Recovery feature when something went south. That said, it’s still nice to have an install disk handy for those cases when you don’t have a connection, when your connection is slow, or when you just have a whole bunch of Macs and don’t want to have to download the installer on each and every one of them.
The good news is, as with Lion and Mountain Lion, it’s possible to create a local USB installer for Mavericks. The bad news is that it wasn’t as simple as it was before—Apple has changed the way the installer works, and making an install disk manually is more difficult than it used to be. Before we get started, here’s what you’ll need:
An 8GB or larger USB flash drive, or an 8GB or larger partition on some other kind of external drive
The OS X 10.9 Mavericks installer from the Mac App Store in your Applications folder. The installer will delete itself when you install the operating system, but it can be re-downloaded if necessary.
The latest beta of the Lion Diskmaker app, available here (as of this writing, version 3 beta 3 is the most recent). This app is free to download, but the creator accepts donations if you want to support his efforts.
An administrator account on the Mac you're using to create the disk.
https://discussions.apple.com/docs/DOC-3353
Install or Reinstall Mavericks or Mountain Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because
the following procedure will remove everything from the hard drive.
OS X Mavericks- Erase and reinstall OS X
OS X Mountain Lion- Erase and reinstall OS X
OS X Lion- Erase and reinstall Mac OS X
About TimeMachine backups and Recovery Mode
http://support.apple.com/kb/HT1427
http://www.apple.com/osx/recovery/
OS X Lion and later let you:
Start from OS X Recovery using your Time Machine backup disk. With OS X v10.7.3 and later, Time Machine backs up the Recovery System on your Mac to your backup drive as well. This lets you use your Time Machine drive to start up your Mac if needed. OS X Recovery:
http://support.apple.com/kb/ht4718
OS X Internet Recovery
Mac models introduced after public availability of OS X Lion include the ability to start up directly from an Internet-based version of the OS X Recovery system. OS X automatically uses this feature when the Recovery System on the hard disk isn't available (such as when your hard disk encounters an issue, or when your hard disk has been replaced or erased). OS X Internet Recovery lets you start your Mac directly from Apple's servers. Starting up from this system performs a quick test of your memory and hard drive to check for hardware issues.
OS X Internet Recovery presents a limited interface at first, with only the ability to select your preferred Wi-Fi network and, if needed, entering a passphrase. Next, OS X Internet Recovery downloads and starts from a Recovery System image. From there, you are offered the same utilities and options as a local Recovery System.
Requirements for reinstalling OS X using Recovery
Reinstalling OS X using OS X Recovery requires broadband access to the Internet via Wi-Fi or an Ethernet connection. OS X is downloaded over the Internet from Apple when OS X Recovery is used for reinstallation
If you use Internet Recovery to reinstall OS X, it installs the version of OS X that originally came with your computer. After installation is finished, use the Mac App Store to install related updates or later versions of OS X that you have previously purchased.
What to do if the installer warns that no Recovery System can be created
Some disk partition configurations may result in the OS X installer reporting that it could not create a Recovery System. In these situations, even if you are permitted to continue the install, you may want to quit the installation and create an external, bootable OS X hard drive with a Recovery System, first. You can continue your OS X upgrade on your computer's startup drive after creating an external Recovery System.
Your storage device must have at least 13 GB available (after formatting) to install OS X Lion or later and a Recovery partition.
These steps erase and reformat the storage device. This article instructs you on setting up a storage device to use the GUID partition scheme and the Mac OS Extended (Journaled) format, which are required to install OS X and a Recovery partition on your external storage device. You should back up any important files that are on the device to a different drive.
This procedure installs a version of OS X that is compatible with the Mac it was created with. Using this OS X system with a different Mac model may produce unpredictable results.
Your computer's serial number is sent to Apple as part of this process to help authenticate your request to download and install OS X Lion.
http://support.apple.com/kb/ht4718
Installing OS X on an external volume - such as your USB flash drive
http://support.apple.com/kb/HT5911

Macbook pro 15" and 17" display turns off whilst working then.......

I have 2 macbook pros. One 17" and the other 15" both are the non unibody ones. The 15" had this problem a while ago but my 17" never did it until today and then it did about 5 mins ago.
Whilst I am working (never seems to happen when I am not using it) the display turns off whilst working. The power light remains constant (ie:- not fading in and out when asleep). But here is the strangest thing. The mac repetitively makes the same noise as if it was ejecting a disk. Has anybody else had this? Know a cure? I recently upgraded to snow leopard but don't think this is a software issue.

I got the same problem with mine, 15". I bought it refurbished from apple store. I had this problem when i bought it then nothing happened for 4 months. But now my MBP has started doing it again. And i don't think it's a software issue. My display switch on after few sec, or 1-2 mins it's depends, and it's pretty random. i'm a bit of worry

IMac display turning off again 10 seconds after system wake

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