My iMac logon screen locks up after it goes to sleep

my iMac log on screen locks up no mouse control after it goes to sleep when I turn it on by hitting the spacebar I have to reboot Iam running the latest softwear

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.

Similar Messages

Why does my iphone 3gs screen go white after it goes "to sleep" for the first time after turning it on?

Why does my iphone 3gs screen go white after it goes "to sleep" for the first time after turning it on?
The screen isn't broken because it works after i turn the device off and back on, but after it goes black once, it's only white again.
But it takes the touches although it's only white, because I can answer my phone when I slide my finger on the bottom of the screen, eventhough there in not the button to see.
This is so weird. I have already done everything I can think of that might help. But I cannot think of anything that might be causing it, because nothing has happened to the device.

Let me know if I should start a new discussion instead of opening a new topic here.
My wife's iPhone is the same vintage as mine 3Gs, but has never had the battery problem. Its affliction instead is that it cannot detect WiFi networks unless it is quite close to the source. Often, when my iPhone not only detects but shows a maximum cells connection with a network, hers cannot detect the network at all. In contrast, her iPhone seems to detect ourcellular carrier just as well as mine does.
Is there any help for this affliction?

Log in screen appear after Mac goes to sleep even if screen lock is turned off.

Log in screen appear after Mac goes to sleep even if screen lock is turned off. This happens usually but not always. Using Yosemite, 2 year old iMac. This has only started to occur recently and it happened in Mavericks also.

Howdy stkh,
You may want to check the General pane of the Security & Privacy System preferences to make sure that the Require password...after sleep or screen saver begins is not checked. See this article for reference -
OS X Yosemite: General pane of Security & Privacy preferences
Thanks for using Apple Support Communities.
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Ipod shuffle volumes goes down get screen locked, ipod shuffle volumes goes down get screen locked

ipod shuffle(6th) volumes goes down get screen locked, ipod shuffle volumes goes down get screen locked.
Don`t find screenlock controls neither.
Thanks

Try:
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try on another computer
- Try another cable. Some 5G iPods were shipped with Lightning cable that were either initially defective or failed after short use.
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar

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.

Request to Mods. re: Yoga Tablet pro 2 not wakeable after it goes to sleep

We have a number of posts regarding the Yoga Tablet Pro 2 going to sleep and not waking up. Can we get some kind of confirmation that this is actively being worked on or passed along? I feel most of us have tried to do a factory reset, for some it's worked for a time, others (such as myself) this has not worked at all. It is not a battery issue because when you hard power off the device and repower it back on, the battery still shows maybe a few percent less than when the device went to sleep.
I do know this is frustrating me and I'm tempted to walk away from this tablet for that reason.
Perhaps we can get a confirmation that this has been passed up the chain or any kind of other "official" recommendations to try. It's not fun having to come back to my tablet after it goes to sleep and having to hard power it off and then repower it back on - every 5th or 6th time.
Thank you,
Dan

I am bumping this. I'd like to see one thread or a sticky on this topic. There are too many threads on this issue and some of us are repeating the same information. I'd also like to know if any work is being done by Lenovo on this issue. The Factory reset seemed to work for a 2 weeks and now my tablet is back to sleeping and not waking.
If someone stumbles on this, the North American Number for Lenovo Tech Support is:
877-453-8686
If you call, Remind them that the Factory reset does not work.
Dont forget to be courteous!

Is itunes store down its 9:36 date is saterday march 24 and im trying to download a app and up date a app and after it goes to sleep and i come back on to my ipod touch 4th gen it make me type in my pass word so basicly its not donlading

is itunes store down its 9:36 date is saterday march 24 and im trying to download a app and up date a app and after it goes to sleep and i come back on to my ipod touch 4th gen it make me type in my pass word so basicly its not donlading

Can't connect to the iTunes Store
Best Fixes for ‘Cannot Connect to iTunes Store’ Errors | iPad Insight

I have my AIR plugged into another monitor and after it goes to sleep sometimes it sounds like the system is running and it will not come back up.. I have to restart it. What is this.. Please help

I have a macbook air and i have it hooked to another monitor and I love it but lately it has after it goes to sleep for a while it sounds like it is trying to run the drive or fan really hard and when I try to bring it alive it does not come back to life so I have to hard boot it and then restart it. What is this...

Go into Sys. Pref , and power settings and UNcheck "put hard disks to sleep" on both power tab and battery tab.
When on projector use with your Air and a presentation, dont close the monitor or sleep your Air.
Verify any coincident applications running that can/could conflict with projector / sleep occurrence by running Etrecheck:
report back on same
http://www.etresoft.com/etrecheck
EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. EtreCheck automatically removes any personally identifiable information from the output.

Windows 7 Does Not Respond after it goes to sleep

We are using Windows 7 image distribution through SCCM for our entire organization. Lately, I came across this issue, now becoming more common on all
the systems. The computer won't wake up from sleep by pressing any key, if left unattended for more that 30 Mins (rather after it goes to sleep). A forced Restart is then necessary to return everything to normal. We are using Dell Latitude E series laptops,
as a standard all throughout our organization.
Already tried lot of option like - upgrading the drivers, changing the power plans etc. However, neither of them worked. Any suggestions in this regard
are highly appreciated.
Thanks,
Sam

These type of issues can be solved by performing a startup repair.
http://windows.microsoft.com/is-is/windows7/products/features/startup-repair
additionally this may be helpful
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c01853693
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/windows-7-your-computer-cannot-come-out-of/20ffb7a3-7f0c-46f9-8516-c1e31b11e558
Hetti Arachchige V Aravinda | Network & System Administrator (B.Sc, Microsoft Small Business Specialist, MCP, MCTS, MCSA, MCSE,MCITP, CCNA, CEH, MBCS)

Fans go on at full speed 1 min. after computer goes to sleep

Problem: Fans go to full speed 1 min. after it goes to sleep-mode. The fans will stay on until it wakes up from sleep-mode.
Computer: Apple Power Mac G5 Dual 2.3, OS 10.4.9, 4.5 GB RAM. 2 HD, late 2005 version.
The problem happens every time I put it to sleep, even right after it has been turned on.
I have measured the CPU temp to be as low as 36-40C and it will still turn the fans on high speed when put to sleep.
I have reset the P-RAM and the SMU.
I have installed a fresh version of OS 10.4.9 on second drive, booted from it and it still turn the fans on 1 minute after it goes to sleep.
I have had all the RAM out beside the original RAM. I did an extended Apple Hardware test which passed.
...any ideas ?
-e
5 Macs in total Mac OS X (10.4.9)

After trying all that, it sounds like it's hardware-related--possible logic board--but try this yet.
Do an Open Firmware reset: Hold the CommandOption+OF keys during startup. At the '>' prompt type:
>reset-nvram
Return
>set-defaults
Return
>reset-all
Return
The reason the fans are taking off, is because the OS stops communicating with the logic board.
-Bmer
Mac Owners Support Group
Join Us @ MacOSG.com
iTunes: MacOSG Podcast
 An Apple User Group 

N97 screen lock hangs after reciving call

helo everybody,currently i got a new nokia n97. phone is working fine, yesterday i updated mobile software with 11.0..x . my phone screen locks many times i tried to unlock it but it wouldnt unlock then finally i need to restart my phone then it comes in normal condition .plz give me some suggestion .i need ur helps...
RM-505 V11.0.021

Yes, the phone will often hang if you answer a call by sliding your finger across the screen. I suggest that you get used to unlocking your phone before you answer the call. There are so many people with this bug, that it's almost sure to be addressed in a future firmware update.

IMac Mid 2010 kernel panic after wake up from sleep mode

Hello.
One month ago starting my iMac Mid 2010 occasionally goes to kernel panic. When I click on mouse or press any key, system starting up, but very very slowly, (time on logon screen stay same without refresh) and after few minutes (from 1 - 10 minutes) kernel panic message is appear on screen. I have Mac OS 10.7.5 version installed.
Is there any tool to debug what is wrong. Windows OS has WinDebuger to detaily look inside to core dump and analyze it and in my experience almost allways is possible to detect root of problem.
First of all i was try HW diagnostic from DVD, succesfully passed. Then I run Permission Repair procedure, there were many folders and files with different ACL as system expected.
It is possible that graphic card driver is wrong or has bug from my point of laic view.
I have minimum application with kext installed into system:
VMware fusion
NTFS-3g ( long time same version )
There is part of long kernel panic message:
Interval Since Last Panic Report: 12304 sec
Panics Since Last Report:          2
Anonymous UUID:                    5D8F11DC-6A58-44A2-9C21-E43CFB9935BC
Tue Dec 4 22:05:16 2012
panic(cpu 2 caller 0xffffff80002c4794): Kernel trap at 0xffffff7f8161786d, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x00007fff90fdb488, CR3: 0x000000007bb6201a, CR4: 0x00000000000206e0
RAX: 0xffffff801915a8c8, RBX: 0xffffff800c938300, RCX: 0xffffff801915a8a8, RDX: 0x0000000090fdb000
RSP: 0xffffff807ea237f0, RBP: 0xffffff807ea23810, RSI: 0x000000008e2cf520, RDI: 0xffffff800bac80c0
R8: 0x0000000000994000, R9: 0x000000000fff0000, R10: 0x0000000000000002, R11: 0x0000000000000001
R12: 0x00000000000000b6, R13: 0xffffff800c938300, R14: 0x00007fff90fdb480, R15: 0xffffff800bac80c0
RFL: 0x0000000000010286, RIP: 0xffffff7f8161786d, CS: 0x0000000000000008, SS: 0x0000000000000010
CR2: 0x00007fff90fdb488, Error code: 0x0000000000000003, Faulting CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff807ea234a0 : 0xffffff8000220792
0xffffff807ea23520 : 0xffffff80002c4794
0xffffff807ea236d0 : 0xffffff80002da55d
0xffffff807ea236f0 : 0xffffff7f8161786d
0xffffff807ea23810 : 0xffffff7f81664262
0xffffff807ea23830 : 0xffffff7f81664984
0xffffff807ea23870 : 0xffffff7f81621b7d
0xffffff807ea23890 : 0xffffff7f815f93bb
0xffffff807ea238c0 : 0xffffff7f815fcf47
0xffffff807ea23910 : 0xffffff7f81630096
0xffffff807ea23960 : 0xffffff7f81647786
0xffffff807ea239b0 : 0xffffff7f816414bc
0xffffff807ea23a00 : 0xffffff7f81601477
0xffffff807ea23a40 : 0xffffff7f8163efdd
0xffffff807ea23a90 : 0xffffff7f81604a46
0xffffff807ea23b60 : 0xffffff7f81601afc
0xffffff807ea23bc0 : 0xffffff8000655f3e
0xffffff807ea23be0 : 0xffffff800065681a
0xffffff807ea23c40 : 0xffffff8000656fbb
0xffffff807ea23d80 : 0xffffff80002a3f08
0xffffff807ea23e80 : 0xffffff8000223096
0xffffff807ea23eb0 : 0xffffff80002148a9
0xffffff807ea23f10 : 0xffffff800021bbd8
0xffffff807ea23f70 : 0xffffff80002aef10
0xffffff807ea23fb0 : 0xffffff80002daec3
      Kernel Extensions in backtrace:
         com.apple.ATIRadeonX2000(7.3.2)[9B704AFE-AF23-381E-A057-5982532504F5]@0xffffff7 f815f8000->0xffffff7f818cafff
            dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f8082b000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f80cb3000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f80c7a000
BSD process name corresponding to current thread: loginwindow
Mac OS version:
11G63b
Many thanks for any helping suggestion.
Mano

Here you are rest of KP message:
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5
System model name: iMac11,2 (Mac-F2238AC8)
System uptime in nanoseconds: 40019343425940
last loaded kext at 37729361423656: com.apple.filesystems.msdosfs    1.7.1 (addr 0xffffff7f80798000, size 57344)
last unloaded kext at 37908230931100: com.apple.driver.AppleUSBCDC    4.1.22 (addr 0xffffff7f80795000, size 12288)
loaded kexts:
com.github.osxfuse.filesystems.osxfusefs    2.5.2
com.vmware.kext.vmnet    3.1.4
com.vmware.kext.vmioplug    3.1.4
com.vmware.kext.vmci    3.1.4
com.vmware.kext.vmx86    3.1.4
com.apple.driver.AppleBluetoothMultitouch    70.12
com.apple.driver.AppleHWSensor    1.9.5d0
com.apple.driver.AudioAUUC    1.59
com.apple.driver.AGPM    100.12.75
com.apple.filesystems.autofs    3.0
com.apple.driver.AppleMikeyHIDDriver    122
com.apple.driver.AppleUpstreamUserClient    3.5.9
com.apple.driver.AppleHDA    2.2.5a5
com.apple.driver.AppleMikeyDriver    2.2.5a5
com.apple.kext.ATIFramebuffer    7.3.2
com.apple.ATIRadeonX2000    7.3.2
com.apple.iokit.IOUserEthernet    1.0.0d1
com.apple.iokit.IOBluetoothSerialManager    4.0.8f17
com.apple.Dont_Steal_Mac_OS_X    7.0.0
com.apple.driver.AudioIPCDriver    1.2.3
com.apple.driver.ApplePolicyControl    3.1.33
com.apple.driver.ACPI_SMC_PlatformPlugin    5.0.0d8
com.apple.driver.AppleLPC    1.6.0
com.apple.driver.AppleBacklight    170.2.2
com.apple.driver.AppleMCCSControl    1.0.33
com.apple.driver.BroadcomUSBBluetoothHCIController    4.0.8f17
com.apple.driver.AppleUSBCardReader    3.0.6
com.apple.driver.AppleIRController    312
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.BootCache    33
com.apple.iokit.SCSITaskUserClient    3.2.1
com.apple.driver.XsanFilter    404
com.apple.iokit.IOAHCISerialATAPI    2.0.3
com.apple.iokit.IOAHCIBlockStorage    2.1.0
com.apple.driver.AppleUSBHub    5.1.0
com.apple.driver.AppleFWOHCI    4.9.0
com.apple.iokit.AppleBCM5701Ethernet    3.2.4b8
com.apple.driver.AirPort.Atheros40    505.67.1
com.apple.driver.AppleEFINVRAM    1.6.1
com.apple.driver.AppleUSBEHCI    5.1.0
com.apple.driver.AppleACPIButtons    1.5
com.apple.driver.AppleAHCIPort    2.3.1
com.apple.driver.AppleRTC    1.5
com.apple.driver.AppleHPET    1.7
com.apple.driver.AppleSMBIOS    1.9
com.apple.driver.AppleACPIEC    1.5
com.apple.driver.AppleAPIC    1.6
com.apple.driver.AppleIntelCPUPowerManagementClient    195.0.0
com.apple.nke.applicationfirewall    3.2.30
com.apple.security.quarantine    1.4
com.apple.security.TMSafetyNet    8
com.apple.driver.AppleIntelCPUPowerManagement    195.0.0
com.apple.driver.AppleMultitouchDriver    231.4
com.apple.driver.IOBluetoothHIDDriver    4.0.8f17
com.apple.kext.triggers    1.0
com.apple.driver.DspFuncLib    2.2.5a5
com.apple.kext.ATI4600Controller    7.3.2
com.apple.kext.ATISupport    7.3.2
com.apple.iokit.IOFireWireIP    2.2.5
com.apple.iokit.IOSurface    80.0.2
com.apple.iokit.IOSerialFamily    10.0.5
com.apple.driver.AppleHDAController    2.2.5a5
com.apple.iokit.IOHDAFamily    2.2.5a5
com.apple.iokit.IOAudioFamily    1.8.6fc18
com.apple.kext.OSvKernDSPLib    1.3
com.apple.driver.AppleSMC    3.1.3d10
com.apple.driver.IOPlatformPluginLegacy    5.0.0d8
com.apple.driver.AppleSMBusPCI    1.0.10d0
com.apple.driver.AppleGraphicsControl    3.1.33
com.apple.driver.IOPlatformPluginFamily    5.1.1d6
com.apple.driver.AppleBacklightExpert    1.0.4
com.apple.iokit.IONDRVSupport    2.3.4
com.apple.driver.AppleSMBusController    1.0.10d0
com.apple.iokit.IOGraphicsFamily    2.3.4
com.apple.driver.AppleUSBHIDKeyboard    160.7
com.apple.driver.AppleHIDKeyboard    160.7
com.apple.driver.AppleUSBBluetoothHCIController    4.0.8f17
com.apple.iokit.IOBluetoothFamily    4.0.8f17
com.apple.iokit.IOSCSIBlockCommandsDevice    3.2.1
com.apple.iokit.IOUSBMassStorageClass    3.0.3
com.apple.iokit.IOUSBHIDDriver    5.0.0
com.apple.driver.AppleUSBMergeNub    5.1.0
com.apple.driver.AppleUSBComposite    5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice    3.2.1
com.apple.iokit.IOBDStorageFamily    1.7
com.apple.iokit.IODVDStorageFamily    1.7.1
com.apple.iokit.IOCDStorageFamily    1.7.1
com.apple.iokit.IOSCSIArchitectureModelFamily    3.2.1
com.apple.iokit.IOFireWireFamily    4.4.8
com.apple.iokit.IOUSBUserClient    5.0.0
com.apple.iokit.IOEthernetAVBController    1.0.1b1
com.apple.iokit.IO80211Family    420.3
com.apple.iokit.IONetworkingFamily    2.1
com.apple.iokit.IOUSBFamily    5.1.0
com.apple.driver.AppleEFIRuntime    1.6.1
com.apple.iokit.IOHIDFamily    1.7.1
com.apple.iokit.IOAHCIFamily    2.0.8
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.sandbox    177.8
com.apple.kext.AppleMatch    1.0.0d1
com.apple.driver.DiskImages    331.7
com.apple.iokit.IOStorageFamily    1.7.2
com.apple.driver.AppleKeyStore    28.18
com.apple.driver.AppleACPIPlatform    1.5
com.apple.iokit.IOPCIFamily    2.7
com.apple.iokit.IOACPIFamily    1.4
Model: iMac11,2, BootROM IM112.0057.B01, 2 processors, Intel Core i3, 3.06 GHz, 4 GB, SMC 1.64f5
Graphics: ATI Radeon HD 4670, ATI Radeon HD 4670, PCIe, 256 MB
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353637334648302D4348392020
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353637334648302D4348392020
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.67.5-P2P
Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: WDC WD5000AAKS-40V6A0, 500.11 GB
Serial ATA Device: OPTIARC DVD RW AD-5680H
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd110000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Keyboard Hub, apple_vendor_id, 0x1006, 0xfa140000 / 5
USB Device: Apple Keyboard, apple_vendor_id, 0x0221, 0xfa142000 / 7
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 6
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa120000 / 3
Mano

Why does my screen freeze after it goes to sleep?

I have a Mac OS X Lion version 10.7.4
If I don't shut down my computer after each use and it goes into sleep mode, when I return the windows are frozen and when I move the mouse around, it blanks out the screen.
I have been able to figure out that pushing the "help" key on my keyboard, will stop the mouse from blanking out the screen wherever it moves across, however, all the windows remain frozen and I cannot click on anything even to try and shut down my computer. I have to shut it down by using the power button.
Once I restart my computer it is fine, but this problem will reoccur whenever it goes into 'sleep' mode.
Any help here?

I have been having the same problem with my MacBook Pro -2010 though. It just started a few weeks ago; can't seem to get the to screen stay on long enough to log back in; it goes back to black within seconds. I have tried all the different buttons; esc works sometimes after holding the power button down for a few seconds. Eventually the log in screen [or the screen I was at when I closed the top] will come back on.
I hope I can find the answer to this as I can't afford a new machine right now. Besides, it's only a year old but out of warranty.

Imac keeps waking up immediately after being put to sleep

hi
firstly, apologies if this question has already been answered elsewhere in the community
i bought an imac in june of this year (running most up-to-date version of mountain lion), and normally when i leave it, i put it to sleep instead of shutting down
have had no issues in doing this until last night.. now, as soon as i put it to sleep, it goes into sleep mode and then instantly wakes itself up again
i have checked the battery on the mouse and the keyboard (98% and 100% respectively)
i have nothing plugged into any usb ports
any ideas on why it keeps waking up by itself and how to resolve this issue?
thanks

hello
thanks for your reply
i am new to apple products and to the community, and having read the community etiquette i apologise for not referring to the 'more like this' section before i posted - lesson learned
in respect of your advice, i checked the energy saver options as you suggested and the 'wake for network access' option was unchecked
interestingly, i have never had this issue until last night and i have made no system changes, downloaded or updated anything?
still a bit confused, will read through the 'more like this' posts and see if my answer lurks there somewhere
thanks again

How to find out what is preventing imac with os x 10.7.3 going to sleep?

What does preventing my inac going to sleep? In the morning before i leave to work everything is sound,but at the lunch time its impossible to put it into sleep mode. Tried to quit all apps,but no success. And every single day same story. Any ideas?

Test after each of the following steps:
Step 1
 ▹ System Preferences ▹ Energy Saver ▹ Power Adapter ▹ Wake for network access: uncheck. You may need to unlock the preference pane by clicking the lock icon in the lower left corner and entering your administrator password.
Step 2
 ▹ System Preferences ▹ Energy Saver ▹ Schedule… ▹ Start up or wake: uncheck
Step 3
 ▹ System Preferences ▹ Print & Scan ▹ Open Print Queue...
Check all printers for unfinished jobs. Deal with any you find.
Step 4
Disconnect all wired peripherals except keyboard, mouse or trackball, and monitor, if applicable.
Step 5
Launch the Activity Monitor 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.
☞ If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Activity Monitor in the page that opens.
Select All Processes from the menu in the toolbar, if not already selected. Enter “powerd” (without the quotes) in the "Filter" text field. Select the powerd process and click the Quit Process button in the toobar (stop-sign icon.) In the sheet that opens, click Force Quit. You’ll be prompted for your administrator password. The process will be relaunched immediately.
Step 6
Boot in safe mode and log in. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
The login screen appears even if you usually log in 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.
Safe mode is much slower to boot and run than normal. Don’t launch any applications at first. If sleep still doesn’t work properly, back up all data and reinstall the Mac OS. After that, if you still have the issue, make a “Genius” appointment at an Apple Store to have the machine tested.
If sleep now works as expected, go on to the next step.
Step 7
Still in safe mode, launch the usual set of applications that are running when you have the problem, including your login items, one at a time, testing after each one. Some applications may not work; skip them. You might be able to identify the cause of the problem this way.
Step 8
If sleep is still working after you’ve launched all the usual applications, reboot as usual (not in safe mode) and test again. If sleep still works, you’re done, at least for the moment.
If you still have the sleep issue after booting out of safe mode, post again.

My iMac logon screen locks up after it goes to sleep

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