Display doesn't wake after going to sleep

On rare occassion, but often enough to be a hassle, my 20" apple display will stay black after I move the mouse or hit the keyboard after the computer has gone to sleep. My only solution is to hold the power button in for 5 second and force a restart. Why does this happen and what can I do to stop it?
Thanks!
Norm

Norm,
I to am having the same issue. In fact, not only does my computer not wake up but the fans turn on full speed and wont go off.
As of this posting I have been on the phone to APPLE TECH for 1 hour. Tried many different 'fixs' with no results. I have been instructed to call back tomorrow and continue with a 'higher up' techy.
I'll post what ever the Tech results are at that time. Hang on a little longer.

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MacBook Pro Won't wake after going to sleep.

I have been having this issue for quite sometime now. My 15" MacBook Pro (Late 2008) will go to sleep and then not respond when trying to wake. This only happens when my computer goes to sleep with the display open (usually when watching DVD's or writing papers). The indicator light stays bright and the only way to get it responding again is to shut the whole thing down by holding the power button I have searched the forms and can't find anything that has worked... I have cleared the PRAM and reset the SMC as it said to do on other posts on these forms, but nothing has worked. I have run all OS X updates and firmware updates. I'm running on 10.6.2.
I have heard it could be the Bluetooth or an external drive attached... neither of them are on my mac.
Should I take it into the apple store? Or has someone figured this out?
Thanks!

Sorry for such a long delayed response...
I was able to get to an apple store this past weekend, and let me tell you... I'm about finished with there great "support".
Right before I went to the store, I tried to eject a disk. Well the cloth in the SuperDrive (I assume to protect the drive from dust and such) Pulled up with my disk. So I get the Apple store, describe my problem and what happened with the cloth piece. The "Genius" writes up a form and tells me they have to run diagnostic and it will take a couple days... and I will get a call when its done (1-3 days).
Well on day number 3 I called up the store and they told me it was ready to be picked up? I asked if anything had been fixed and they told me they could not reproduce my "sleep issue", so they couldn't fix that.. but told me the cloth piece in the SuperDrive had been fixed.
I drive an hour (one way) to the Apple store to find that all they did was PULLED OUT the cloth... they did not replace it! So basically I have a hole for a Super Drive.
I asked why I was not called to say that my computer was ready to be picked up... didn't get an answer on that one.
I asked why my SuperDrive was said to be fixed, when nothing was done... they told me that it would have to be sent out to the factory store for that to be fixed (FIRST TIME THEY MENTIONED THAT!) Oh, and that would take 5-7 business days. Well that's not going to happen right now considering I'm a college student that NEEDS a working computer!
So I go home, angry... start just putting all my important documents back on the computer. And the screen starts blinking!!!! I guess now I have the same thing described in another post on these forms...
Lets just say that I'm not very happy with Apple right now! If anybody else has success on either the sleep issue or the screen blinking issue, please let me know!
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ENVY 7640 - Power Button doesn't work after going to sleep

We print about once a day. It printed the first day without problems.The second day, we were unable to print and went to the printer and pushed the touchscreen - nothing happened.Then we pushed the power button - nothing happened,Then we unplugged and re-pluged the power cord - the printer booted and we were able to print. The third day, we were unable to print and went to the printer and pushed the touchscreen - nothing happened.Then we pushed the power button - nothing happened,Then we unplugged and re-pluged the power cord - the printer booted and we were able to print.The fourth day, we were unable to print and went to the printer and pushed the touchscreen - nothing happened.Then we pushed the power button - nothing happened,Then we unplugged and re-pluged the power cord - the printer booted and we were able to print.Then we registered with this forum and ask this question:HOW CAN WE KEEP THIS PRINTER POWERED ON WITHOUT RE-PLUGGING IT EVERY DAY?

I have the same issue as described at the beginning of this post. As noted by teacher, I have checked and confirmed the green light in back is still lit. I just bought this printer and issues started from the beginning. After I unplug and then restart the printer that way, it turns on and the power button will turn off and then turn on the printer. Its only after its static for a long time and goes into some undefined mode. At that point, the printer no longer responds. How can a company ship a product to customers in which the power button doesn't work? The only reason I bought this printer was becuase my HP Photosmart 7510 randomly gave me printer head error after changing the ink. It was only like 3 years old. I can't believe my new printer is buggy. Your company is on thin ice now. Please help me resolve this problem.

T400 does NOT wake up after going to sleep

T400 does not wake up after going into sleep. It goes to sleep ok but everytime wheni try to wake it, it restart the whole system instead of waking up.
I have checked the BIOS Security setting and it already set on Active. All drivers are upto date.
Please help!!
Message Edited by farooqjilani on 03-09-2009 08:23 AM

I have a similar issue with a T400 (xp sp2).
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ThinkPad T420i won't wake up after going to sleep.

My T420i won't wake up after going to sleep (using Fn F4 or close the laptop or time out). The computer was wiped clean and reinstalled with only Windows 7 professional and some Levono softwares. BIOS, windows and all drivers are up to date. The only way to get it back is hold the power button to reboot it. When it reboots, i get improperly windows shut down error.

I'd guess it's ACPI related issue. Check out ACPI driver and correspondent items in Control panel.
Energy report might be helpful too ("powercfg -energy" command within console window with administrator rights)
x220 | i5-2520m | Intel ssd 320 series | Gobi 2000 3G GPS | WiFi
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IPhone 4 doesn't wake up from the Sleep Mode

iPhone 4 32Gb doesn't wake up from the sleep mode. When the iPhone goes into the sleep mode, I can't wake it up with the 'Power' button, neither with the 'Home' button. The phone is working, I even can hear the sound of 'unblock' slider if u touch and slide the screen at the place where the 'unblock' slider suppose to be, but the screen remains black. I have to push the 'Home' or 'Power' buttons MAAAANY TIMES to make the screen appear finally. Sometimes I need to push it 30 or 40 times!!! Or I just have to reboot the phone to make it work. But right after it goes into the sleep mode, I can't wake it again But when the phone is connected to iTunes, the sleep mode is working good (one push on the button and the phone is awaken). I tried to upgrade to 5.01 but nothing have changed. Also I've tried to synchronize the phone as 'New', but no luck again, the problem is still on the case. What I have to do? Do someone have the same problem? In Russia we have no official Apple Stores and my iPhone 4 is from Malaysia. So I can't just go to the Apple office and replace the phone. What can I do?

No, I don't have a case only a protective membrane on the screen... and I've tried to reset the iPhone by holding the 'Power' and 'Home' buttons with no result. After this reset the phone is working normally sometimes for about ten minutes (wakes up after one push), but then it's all repeats. And I repeat, that if I connect the iPhone to the PC with the USB-cable, the sleep mode is working fine, just like it should (I can wake the phone with one button push).

IMac - Display doesn´t work after restart

My iMac 21 Display doesn´t work after restart. If I turn it off and 1 hour later I want use it again the iMac shows the white screen with the mac logo and then the display goes off. I connected an external display to check if the iMac was ON and with the external display I can login and do everything but the iMac Display doesn´t work .
If I turn it off and wait 3 or 4 hours and then turn it back on the display works OK.
This is very strange behavior I have spent hours and hours trying to fine the solution or a similar issue but nothing so I am looking help here at apple.com
BTW When I bougth the iMac 21 there were some spots over the display so the display was replaced by the provider. The warranty has expired by now.

To tell you the truth, I don't know if they have to repalce the LCD panel or what they do for a bad backlight. In this reality of block or assembly replacement it probably involves repalcing the panel and not the backlight component. Don't know what it would cost. You'd have to ask that of a service center.

Power Mac G4 loses internet connection after going to sleep

Run down of computer: I have a Power Mac G4 tower, PANTHER OSX. I have wireless internet through our cable company—I use a wireless router. When I am connected to the internet, and browsing the web or something, if I let the computer go to sleep, it loses connection. I have to go back up to the little signal icon and reconnect to my wireless network.
I suspected it might be a setting through the router, but when my computer was comletely unplugged, and absent from the apartment, the other computer (G5 imac–TIGER) which was having the same problem, suddenly was staying connected even after going to sleep. When my computer came back home and was hooked back up, suddenly the other computer had the same problem again. So, I concluded that my G4 tower was the culprit, and perhaps not the router. We share a wirless network, so it's not surprising that this is the case.
I know there must be a setting somewhere in preferences or something that is telling the computer to disconnect from network when computer sleeps. I have looked everywhere, and can not figure it out.
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Power Mac G4 Tower Mac OS X (10.3.4)

Tried that too! Notta.
This one's really a pickle! Even the Mac specialist at my office was baffled! He suggested shortening the name of my computer...(Jamie Cendroski's computer)...I didn't really understand how this had anything to do with it...but he's supposed to be the expert. He also suggested trashing my keychains and making new ones. I messed around with them, but I don't know enough about this stuff to be bold enough to trash them yet. I'll do a little more research before I do so. I think he might be onto something with the keychains though..?

My 13" early 2011 macbook pro is having trouble connecting back to internet after going to sleep. before updating to EFI 2.7 it was perfect now after updating its gone bad

My 13" early 2011 macbook pro is having trouble connecting back to internet after going to sleep. before updating to EFI 2.7 it was perfect now after updating its gone bad.

Same issue here too. I will try reinstalling the firmware update. This has happend to me twice. The only way to correct the issue was to reboot.
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My new Mac Air continues to disconnect from WiFi after going to sleep. When waking it up I have to manually re-connect. How do I keep it connected?

My new Mac Air continues to disconnect from WiFi after going to sleep. When waking it up I have to manually re-connect. How do I keep it connected?

I had this problem too and solved it by doing a clean install. After that it was gone.
This is a drastic method since it takes quite some time to reinstall lion and all your software.
Thoughts I had why it started working after a clean install are the following:
It looked like the airport wasn't able to reconnect fast enough before the connection timed out. So what could have prevented my mac from being able to connect fast enough?
Apps that consume processor cycles. I love what I would call 'System Enhancers', little apps that enhance my workflow (Moom, Alfred, Dropbox, Default Folder etc). I'm not saying that these are the problem, they might be programmed processor friendly, but check if you have apps that consume processor cylcles. It might prevent airport from being able to reconnect quickly enough before it times out.
Mobile Config profiles. Another thought I had was that I had a mobile config 802.1X profile installed for the company were I worked. It used TTLS to connect to the corporate network. This profile might have gotten in the way.
And a sidenote...
Routers with hardware acceleration might also be a problem. My router is a Wireless Gigabit Router 300N WL-351 and has hardware acceleration. As soon as I activate that my wifi connection keeps dropping. It is as if a Macbook Air can't handle that amount of optimisation.
That's it, hope it helps those who are still having the problem.
Best, Jan

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Thanks for any ideas on how to re-store the sleep fucntion.

Thanks for the excellent tip. From reading the bluetooth advisories, I realized that my D-link was incorrectly installed in a UBS hub. Moving it to a direct UBS port resolved the problem.
During the trouble shooting process, I found that I do not have a Bluetooth setup assistant. I have recently installed OS X 10.4.6 and also applied the Bluetooth firmware update, but I can not find the Bluetooth setup assistant in Utilites, and a search via Finder didn't locate it either. And I can't find the software in the .Mac downloads.
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HP Envy shutting down after going into sleep mode

Hi. I'm not sure where to post this so I'll try it here.
My laptop shut downs automatically when it goes into sleep mode. Not right away when going into sleep mode. Maybe like an hour later after going into sleep mode.
I'm not sure it's overheating because it never shuts down while I'm actually using the laptop.
Do you guy have any idea how to fix this?
Product name and number: HP ENVY TouchSmart Sleekbook 4-1115dx
Operating System: Window 8
Error Message: None
Any changes to your system before problem occurred: No

Hey Tecmo_SB_Guy,
I would suggest you take a look at advanced power settings. It can seem like the notebook is turning off when it is actually just hibernating. You can set it to not hibernate.
1. Windows key + Q to open the Search Bar
2. Type "power"
3. Click Settings under the Search Bar
4. Select Power Options from the results on the left.
5. In Power Options, Click Change when the computer sleeps, on the left.
6. Set the Put the computer to sleep setting so that it fits your usage best.
7. Click Change advanced power settings, at the bottom.
8. Expand Sleep and expand Hibernate after. If you want you can change the hibernation setting to Never by typing "Never" into the minutes field. See attached picture. You can do this for battery and/or plugged in.
9. Click Apply to save changes.
If you don't already shut it down periodically, I would suggest shutting it down at least 2-3 times a week if you use it daily. Leaving the computer running continuously can shorten its lifespan. Hard drive failures and motherboard issues are seen much more often on machines that are left running constantly. Computers get bogged down and run slowly when the memory is full. Memory only clears out and resets itself when the computer is shut down. Here is a link explaining more about memory accumulation and hardware aging.
I hope these suggestions help! Please let me know if you have any questions
Attachments:
PowerHibernateNever.jpg ‏59 KB

Display doesn't wake up after going to sleep

On rare occassion, but often enough to be a hassle, my 20" apple display will stay black after I move the mouse or hit the keyboard after the computer has gone to sleep. My only solution is to hold the power button in for 5 second and force a restart. Why does this happen and what can I do to stop it?
Thanks!
Norm

If your Mac happily goes to sleep but won't wake up--Hold down the power switch to force-reboot your machine and get it running again.
Don't worry-your Mac isn't narcoleptic. Its Open Firmware system or NVRAM (nonvolatile RAM) is likely corrupt, and your Mac can't remember how to wake up.
Restart your Mac and immediately hold down the Command-Option-O-F key combo until you see a somewhat intimidating command-line display that ends with the Open Fimware prompt. Type the following line:
reset-nvram
press the return key on your keyboard
set-defaults
press return
reset-all
press return
Your Mac will reboot. Once it's running, put it back to sleep to test. If the problem recurs your Energy Saver preferences may be the culprit. Delete the com.apple.PowerManagement.plist file (go to Finder/Hard drive/Library/Preferences/SystemConfiguration)--don't worry, your Mac will regenerate a new one--and then restart to see if that rights the wrong.
Still did'nt work? Might be time to call AppleCare or see an Apple Genius or a technician.
Cheers!
DALE

Help! 2010 imac 27" - Display doesn't work after long sleep

I just recently started having this problem. I've had this iMac since 2010 with zero issues, but it seems like ever since I downloaded Yosemite, the screen won't work after the computer has been sleeping for a while. I have to hold the power button and do a hard restart to get it to work again. If the computer has only been sleeping for a while, it wakes just fine. It's only after it's been sleeping all night and I go to use it agsin. I've checked power connections and all is good. Any ideas??

Hi Punisher8522,
Welcome to the Support Communities! The resource below offers some troubleshooting steps to try when your computer won't wake from sleep.
OS X: When your Mac doesn't sleep or wake - Apple Support
http://support.apple.com/en-us/TS5357
Your computer cannot wake from sleep
Make sure your computer isn't powered off by pressing the power key for one second.
If you're using an external display, make sure your display is not powered off or unplugged.
If you are using a Mac desktop:
Make sure the AC power cord is connected securely to the computer and outlet.
Make sure the AC power outlet it is connected to is working properly.
If your computer is plugged into a power strip, make sure the power strip is not turned off. Check to make sure other items connected to the power strip are receiving power.
Your computer is slow to wake from sleep
If you see a progress bar when you wake your computer from sleep, this is normal. The computer is waking from safe sleep.
OS X Recovery and sleep
The system software your computer uses when started from OS X Recovery allows display sleep. Your computer does not go to sleep on idle while started from Recovery unless you are using a Mac notebook that is not connected to AC power.
Additional troubleshooting
If the steps above do not resolve your sleep-related issue, try these additional recommendations.
Reset SMC
The System Management Controller (SMC) is involved in managing power on your computer. Reset the SMC on your Mac if you are having difficulty sleeping or waking your computer.
Reset NVRAM/PRAM
Nonvolatile RAM (NVRAM)/Parameter RAM (PRAM) stores some power-related settings.Try resetting NVRAM/PRAM if you are having difficulty sleeping or waking your computer.
Test with external devices disconnected
Some external devices can prevent your computer from sleeping. Try disconnecting items other than your Apple keyboard or mouse from the built-in USB, Thunderbolt and Firewire ports on your Mac. If this resolves the issue, try reconnecting your external devices one at a time until you find the device preventing sleep or wake. Check the documentation that came with the device, or contact the device manufacturer for more information.
Try Safe Mode
Check to see if the issue still occurs when the computer is started in Safe Mode. If this resolves the issue, it could be related to a third party software item such as:
a login item
a startup item
a third party kernel extension
Try another user account
Try creating another user account, or log in as guest. See if your computer sleeps and wakes properly from the additional user account. If it does, your issue may be related to one of the following:
a login item
an app open in the original user account
You can disable login items from the Accounts pane of System Preferences. Try opening only one app at a time in the original user account to determine which app is preventing sleep. If you isolate the issue to a particular app or login item, check its documentation, or contact the developer of that software for more information.
Last Modified: Sep 19, 2014
I hope this information helps ....
- Judy

Display doesn't work after sleeping.

I have a trouble, after I put my notebook in sleep mode, it doesn't wake up, but the leds are working. I have to shut it down manually from the button, that is not so good.

Hi @m1do ,
Thank you for visiting the HP Support Forums and Welcome. I have looked into your issue about your HP Pavilion 15-n057sr Notebook PC and issues with the sleep mode. Here is a link that goes through some troubleshooting steps to resolve the sleep issues.
Here is a link to the HP Support Assistant. Just download and run the application and it will help with the software and drivers on your system making sure your system is up to date, as this could cause this same issue.
Please let me know how this goes.
Thanks.
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 to say “Thanks” for helping!

Display doesn't wake after going to sleep

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