Screen goes to sleep and won't wakeup

13" macbook screen goes to sleep but won't wakeup reliably. I can see a faint dark screen and I hear the computer working but can't see anything. If I press the screen light keys it will flash a view and almost seems to fix the problem. Closing / opening clamshell a number of times eventually causes it to work. The sleep light on the front sometimes stays solid instead of throbbing. I can even plug a remote monitor in and it will display on the remote. Using 10.6.8

I've had this issue twice with my 2009 white MacBook. Fortunately I still had the apple care support which expires in June! The most recent occurrence was last week. The inverter board had to be replaced and they actually ended up replacing my LCD this time. Evidently its a faulty design with this model. The repair was free to me, but I noted the cost on the invoice when I picked up my computer. The inverter board and another part were a total of $75, and the LCD was about $300. But like I said, the first time they did not replace the LCD screen, so it could be a minor repair.

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Screen goes to sleep and won't come back on - how to fix?

My 2009 MacBook screen goes to sleep and won't come back on. It just stays black while the computer is still running. This just started happening one day for no apparent reason. Anyway to reconcile?

When you post for help, please state which OS X is installed.
If you aren't sure, click About this Mac from your Apple menu 
Troubleshooting advice can depend on that information.

My iMac 27 2010 vintage goes to sleep and won't wake up...I have to push the on off button and hold till it shuts down and then re start...This is not good..Help please

My mac iMac 27 2010 vintage goes to sleep and won't wake up till I hold the on off power button....Then I have to restart as it is locked up....This it intermittent..
Help Please
Jim

Ops I replied to myself in error.....
Tom:
I performed the steps indicated but this morning when I clicked the mouse and hit the space key and clicked the track pad again as before nothing happens.
I hold the power button for a few seconds and the screen fills as if the computer was normally awakened but it is locked up.
Then I have to shut it down with the power button and then power it up as a reboot.
Not good...SMC reset didn't work....Throughout the day yesterday I put the computer to sleep and woke it up normally. It seems to be a overnight problem.
Am I going to have to shut it down everynight?
Jim

When my screen goes to sleep and then the hard drive goes to sleep why won't the screen wake up?

I can repeat this 100% of the time. If I let the screen go to sleep (or I manually put it to sleep) and I shut the computer so the hard drive goes to sleep (or if the hard drive simply goes to sleep on the timer), when I open the Macbook Pro the screen will not wake up, although I think the hard drive does as the back light on the keyboard turns on. Any ideas on why this is happening. My computer is 4 weeks old...a bit frustrating. The best answer I have gotten is get a new one for Apple...or completely re-install the OS.
Jared

The reason why it's happening is not obvious and can't be determined without more information. The fact that you can reproduce the problem makes it a lot more tractable.
As a first step, boot in safe mode (shift key down at startup.) Can you reproduce the problem now? If so, note the time, then reboot as usual (not in safe mode) and look in the system log for error messages at the time the screen failed to wake up.

Macbook Pro's screen goes black after going to sleep and won't turn on no matter what key I press

Hi there, I just got a new Macbook Pro, it's literally six days old. I just got some new memory installed on it and now the screen frequently stays black after it has gone to sleep for several minutes. No key will reawaken my laptop, though the small light indicating power at the bottom right hand corner of the laptop still glows, making me think the laptop is still on. Is this normal? Is there any way to remedy this?

Read the user manual to make sure you installed the ram correctly. Put the old ram back in. Same issue?
If you were not the person that installed the ram, return the computer.
Call Apple Care.
#1 - You have 14 days from the date of purchase to return your computer with no questions asked.
#2 - You have 90 days of FREE phone tech support.
#3 - If you've purchased an AppleCare Protection Plan, your warranty last for 3 years. You can obtain AppleCare anytime up to the first year of the purchase of your computer.
Take FULL advantage of your warranty. Posting on a message board should be done as a last resort and if you are out of warranty or Apple Care has expired.

Mac laptop screen going to sleep and changing desktop background

last weekend my daughter called to say that her Macbook was acting strange. On Friday night she saw the battery icon said 25%, so she shut the system down. The next morning she plugged it in and booted. It took a while and the desktop background had changed to something grey. Also, the screen would blank out after 30 seconds to a minute. If she hit the space bar it would show and then go black after the 30 to 60 second time period. I had her shutdown and boot to her external drive where she had a month old image of her system. It took a minute or two to boot (it always seems like a long time when you are on the phone). It came up as her normal system and background. She left it for over an hour and it did not black out or go to sleep. We were planning on doing a restore the next day, but when she did a normal boot later that day from the internal hard drive, it came up with her normal background and the screen stayed active. She had not tried to set any settings. Is there something that a low battery would do to change the energy settings? We were going to explore the settings when the system magically worked as normal. It seems strange that a boot to the external drive would restore settings so that the system worked normally.

Energy Saver and third party USB often don't go well hand in hand. I would though contact OWC and let them know you are having this problem, since they have a good track record of supporting the Mac platform. In the meantime, use Screen Saver instead of Energy Saver.
And always keep your data backed up at least twice as my FAQ explains:
http://www.macmaps.com/backup.html

Is there a way to detect the event when device goes to sleep and the screen blackens?

I want to detect the event when the iOS device goes to sleep and the screen blackens?
Is there any way to do it?

Hi,
A small idea, please check whether it will work or not.
You can achieve this by using combination of DNS server and reverse proxy server.( Customized apache). Make 'A' record for www.abcd.com to reverse proxy server IP address in your DNS.
So it will resolve your reverse proxy IP address for requests.
Configure appche to accept incoming request for www.abcd.com and points towards www.abcd.com/parameters.
I think this will solve your problem. Only one condition is that proxy server will communicate with www.abcd.com on behalf of client.
Follow the link for configuration of reverse proxy server
http://www.slashroot.in/how-configure-basic-apache-reverse-proxy
HTH
Naisam

HT1776 Hi, my iMac screen goes to sleep but the fan stays on 24hrs and never stops?

Hi, my iMac screen goes to sleep but the fan stays on 24hrs and never stops? You can hear it running all night.
Appreciate any advice.I'm using Lion. Many problems started since using Lion!

The temps are a bit higher than I'd expect under normal circumstances, and too high while playing games, but what is the room temp where it is?
I def. think its a temp thing now. but why does it only raise when im playing games or watching videos online?
Games tipically press the CPU, Video Card, RAM, and everything else much harder than most apps.
It may be a Fan not working properly, or just dust buildup.
Boot off your Install Disk while holding down the *d key*, (not c key), then run the extended Apple Hardware Test. Some disks require you to use the Option key at bootup to select AHT. Some models have a separate AHT CD.
Report any errors it finds.

Powercfg sets power plan with never sleep but system goes to sleep and locks the screen

I created a command (.bat) file that executes 'Powercfg -s 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c' where '8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c' is the class name for power option (HighPerf) that sets sleep to never. Then I created a scheduler's task to execute
this command file at specified time. The goal here is to switch at this time from power option that has sleep in 1 hour (Balanced) to the power option that never sleeps.
At the designated time the power option changes from Balanced to HighPerf but after some time computer both goes to sleep and locks the screen. I do not know whether this happens at the same time or not. It is just that when I get to my computer some time
(2 hours) later, it is in the sleep mode (the light on the power button is amber), I need to press the power button to wake it up and when it comes to life I find out that the screen is locked and I need to enter the password.When I open Control Panel it shows
that HighPerf power option is selected. Yet, the computer went to sleep and the screen got locked.
All this does not happen when I set HighPerf power option from the Control Panel.
I am using Dell XPS 8500 desktop with Windows 7 Home Premium, so battery and closed lid settings do not apply as they do not exist on this computer, so those settings are not at issue.
Thank you
Isa Ten

Hi Isa,
Based on your goal "The goal here is to switch at this time from power option that has sleep in 1 hour (Balanced) to the power option that never sleeps.", why didn't you set the Balanced option to never sleep?
If you just ant it at one time to switch, you need another task to change back. Otherwise, it keep "never sleep" and "high perf"status.
Meanwhille, check your hibernate status of these power plan under sleep tab:
Power Options->Change Plan Settings->Change Advanced settings, you see a tap "Sleep"
Karen Hu
TechNet Community Support

Ipod Nano 6th generation setting issue - hi, when i am listening music and the screen goes to sleep my music stop playing.Please help with settings

hi, when i am listening music and the screen goes to sleep my music stop playing.Please help with settings

No problem. And no worries, several people have made this same mistake!
Either way enjoy the iPod!
Brock

Problems: undoes sleep, and won't give up

Folks:
A few days ago, I connected a new Seagate 1.5TB drive (USB2), accepted an offer to format the drive, and enabled TM. (Or was it vice-versa? I don't recall.)
First Problem: Something undoes sleep
Since then, when I use Apple Menu "Sleep" the system goes to sleep, and that wakes up a few seconds later. Always. This cannot be good for the system, and it isn't good for my electricity bill.
Is this waking due to enabling TM and/or attaching the Seagate drive? It seems likely, as it started happen just after I enabled TM, and I am certain I have done nothing else to the system that should affect sleep. About "Put the hard disk(s) to sleep when possible" in the Energy Saver Control Panel: I routinely leave this ENABLED. I've tried both settings since I enabled TM. No difference.
I routinely leave the Energy Saver "Put the computer to sleep when it is inactive for" setting to 15 or so minutes. Since the computer was not been asleep any morning when I start work since I enabled TM, I assume this route to sleep also fails.
Q1: How to restore sound sleep on my system?
Second issue: Won't give up.
At the moment, the TM monitor icon at the upper right of my screen is circling. It's been circling for at least 15 minutes. Before that I noticed that TM had started a backup. I checked: it was going to back up only 552 KB, which seemed reasonable -- I haven't been doing very much so far this morning. I checked minutes later. No sign of progress. I checked a few minutes later, no progress, so I clicked on the 'x' to abort the backup. Now the top entry on the TM monitor pulldown has been reading "Stopping Backup" for at least 5 minutes.
What to do? TM won't be able to do the next hourly backup if it's still trying to abort the previous one. I tried disabling TM in its Control Panel. It's now off, and yet both the Control Panel and monitor say it's back to trying to backup 552KB ... again.
I'll try dismounting and remounting the external drive. If that fails, I'll restart the system. But, of course, neither of these should be necessary.
BTW, strangely, the full TM menu says the last backup was at 3:10 AM, almost 7 hours ago. Since I didn't try to put the system to sleep last night at about 10pm, and it wasn't asleep when I arrived ... why 3:10? Maybe that's when the Unix cron-timed daily maintenance was done?
By the way, the USB drive IS alive and working. I opened it, found a random file from one of the backed-up folders, and copied it to my internal drive, no problem.
Q2: How to definitively abort a backup?
Q3: How to avoid hung backups in the future?
TIA,
Henry

Pondini:
Thanks for your response!
1. Exclude your TM disk from any anti-virus scanning.
None running.
2. Exclude it from Spotlight (System Preferences > Spotlight > Privacy)
Done! The next hourly scan was running so I aborted it by unmounting and remounting the external disk. When I remounted, TM appeared to be in a consistent, "happy" state. So I chose "Back Up Now" and the backup ran without apparent problem.
So far, so good, Excluding seems to have helped. I'll post back if anything different happens at the next hourly backup, or overnight.
3. Until you resolve this, leave the Put the hard drive(s) to sleep . . .
option OFF.
I did that before my original post, and left it disabled.
My system still won't stay asleep for more than a few seconds.
How is your USB disk attached to your Mac (direct or via USB hub;
port on back or keyboard)?
Directly to the back of the machine. My Mac did not seem to like for it to be connected though my external hub -- it complained about not enough power and shut down the hub. That seems strange, because both the drive and the hub are powered separately by wall-warts. But that's not an issue now.
There may be some clues in your logs. Download the Time Machine Buddy widget
from: http://www.apple.com/downloads/dashboard/status/timemachinebuddy.html.
I'll just use the standard log interface... It shows some nice messages for successful TM backups. Two messages seem to correlate with TM hangs. Here they are:
Indexing a file failed. Returned -1120 for: /private/tmp, /Volumes/Time Machine Backups/Backups.backupdb/Espresso/2009-04-28-041015.inProgress/02A5D71D-2086-47 E0-A006-3C8030F2CAD8/Espresso's HD/private/tmp
Indexing a file failed. Returned -1120 for: /Library/Caches, /Volumes/Time Machine Backups/Backups.backupdb/Espresso/2009-04-28-041015.inProgress/0B66D534-640A-4F 08-9ED4-CBB0F3872450/Espresso's HD/Library/Caches
I googled around about "Indexing a file failed" in connection with TM, but I didn't find anything that useful.
You did this via the Finder? For experimenting, that's ok, but normally to
restore a file/folder from your backups, use the TM interface Enter Time
Machine. Using the Finder can result in permissions problems with the copied
files. Also be very careful not to use the Finder to change, move, or delete
anything in those backups...
Thanks for the warning. I figured as much. I just located a small file on the TM disk and made a copy of it on my internal drive. Simply copying a file from the TM backup directories should not be a problem. If it is, that would indicate TM is a lot less stable than it should be.
By the way, my profile is wrong. I'm running 10.5.6, fully updated.
Thanks,
Henry

My Macbook pro, (late 2010) sometimes will sleep and won't wake up. then the sleep light flashes.What's the problem?

My Macbook pro, (late 2010) sometimes will sleep and won't wake up. then the sleep light flashes.What's the problem

Hi I've been following this thread (along with a different one on the same topic). I've been having the same problem with my ibook. I can add that I have no problem with startup. It's just that the screen "goes to sleep" unexpectedly and may operate normally for a few minutes or a few hours at most. Opening and closing the lid or restarting seems to cause it to awaken but then usually for just a few seconds or minutes. If it is connected to another video display that display continues functioning fine even though the computer screen is blank. In addition the desktop is there and visible faintly or if totally blank can be backlit through the apple logo and can be read. I've had my logic board replaced twice under the extended warranty and assumed it was that but now I'm thinking of the reed switch. Apple refuses to consider any further work under warranty as the last repair was in Jan, 06 and they claim only a 90 parts warranty and the machine is from 03. Any thoughts before I cut the wires? I have reset the pmu, run cocktail and disk utility. Other than the sleep issue the machine works fine. thanks Ronda or anyone else who has any ideas... Dave

Internet goes stale after computer goes to sleep and then needs to be rebooted to function properly

I mac with retina 5k display
internet goes stale after computer goes to sleep and then needs to be rebooted to get it working again
10.10.1 os

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

Screen goes to sleep CONSTANTLY

Ever since the week I installed Mavericks, my iMac display will not stay on.
It goes to sleep, even though my other monitor stays on.
When I give the command to 'sleep' my computer, the instant that it goes to sleep, and I hit the space bar (to reawaken it) the iMac screen comes back.
It generally won't stay on for more than 10 seconds - then it's off again, until I restart, sleep, etc.
Really frustrating.
Thanks

I've had this issue twice with my 2009 white MacBook. Fortunately I still had the apple care support which expires in June! The most recent occurrence was last week. The inverter board had to be replaced and they actually ended up replacing my LCD this time. Evidently its a faulty design with this model. The repair was free to me, but I noted the cost on the invoice when I picked up my computer. The inverter board and another part were a total of $75, and the LCD was about $300. But like I said, the first time they did not replace the LCD screen, so it could be a minor repair.

I'm using a late 2006 2.33GHz imac.I clean installed 10.6 from disc then updated to 10.7 from download.Now every time my computer goes into sleep it won't wake up.Anyone know how to cure this problem please??

I'm using a late 2006 2.33GHz imac.
I clean installed 10.6 from disc then updated to 10.7 from download.
Now every time my computer goes into sleep it won't wake up.
The only way it will restart is to pull the mains lead out of the imac, put it back and try until it will start.
This only happened after reinstalling. Only Apple OS was on the imac and so it must be an issue with the software I believe.....
Anyone know how to cure this problem please?
Thanks
paul

This isn't a fix, more a workaround I used when I had wake from sleep problems that lasted from some point in 10.6.x, through 10.7 and into 10.8 (got fixed for me in 10.8.2). It seems to be connected with Bluetooth failing to wake up properly:
System Preferences>Energy Saver and set 'computer sleep' to 'never'.

Screen goes to sleep and won't wakeup

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