IMac screen simply goes dark

The display on my 2010 iMac (Intel processor) has recently started going dark intermittently. Sometimes the machine can be on for two hours, other times 10 before it happens. Problem is it's happening more often.
When the screen goes dark, I believe the software that was operating at the time is still working though since I can, for instance, still hear the audio I might have been playing before it went dark.
I just can't control anything because I can't see it.
If I reboot, everything comes back up. This machine was NOT upgraded to Maverick.
Anyone else ever had this problem?

I have the exact same issue. It started happening about a week ago. I boot up, everything is operating normally then the screen goes dark, not completely black as in shutdown mode, but very dark blue. My alert badges still come up but none of the usual wake up maneuvers work.

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Laptop screen just goes dark and i have to cold boot

Hello.
My Macbook Pro 2.66Ghz i7, running 10.8 keeps crashing, in various programmes and its getting annoying.
The screen just goes dark but the lights stay on on the keyboard (if thats any help) and i have to cold boot.
Ive got a crash log from console if anyone can help please.
Thanks for your time.
Warren
090113
Interval Since Last Panic Report: 3787974 sec
Panics Since Last Report:          14
Anonymous UUID:                    32C9008D-3F1D-419E-87F5-94D22BAC66E1
Wed Jan 9 20:51:11 2013
panic(cpu 0 caller 0x9d4c9b): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0x0a2910de 0x00100000 0x00000000, BAR0 0xc0000000 0x7fa98000 0x0a5480a2, D0, P2/4
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x551fb888 : 0x21b837 (0x5dd7fc 0x551fb8bc 0x223ce1 0x0)
0x551fb8d8 : 0x9d4c9b (0xbea28c 0xc5a800 0xbf8e60 0x0)
0x551fb978 : 0xaef608 (0x8c37004 0x96e6004 0x100 0x6)
0x551fb9c8 : 0xae6601 (0x96e6004 0x100 0x551fb9f8 0x9c4778)
0x551fb9f8 : 0x16d29a6 (0x96e6004 0x100 0x438004ee 0x0)
0x551fbb38 : 0xb0e2b5 (0x96e6004 0x9770004 0x0 0x0)
0x551fbb78 : 0x9dde7c (0x96e6004 0x9770004 0x0 0x0)
0x551fbc18 : 0x9da55b (0x0 0x9 0x0 0x0)
0x551fbdc8 : 0x9dc42a (0x0 0x600d600d 0x702a 0x551fbdf8)
0x551fbe98 : 0x970582 (0xc1d00011 0xaa910001 0x20802040 0x551fbee0)
0x551fbef8 : 0xd3257d (0x8e53000 0x551fbf4c 0x0 0x7)
0x551fbf58 : 0xd3271a (0x8e22000 0xd39e54 0x551fbf78 0x2a45c9)
0x551fbf78 : 0x230235 (0x8e22000 0x0 0x551fbfc8 0x227cea)
0x551fbfc8 : 0x2a179c (0x863ea0 0x0 0x10 0x9073fc0)
      Kernel Extensions in backtrace (with dependencies):
         com.apple.driver.AGPM(100.12.31)@0xd2f000->0xd39fff
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x93f000
            dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x961000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
         com.apple.nvidia.nv50hal(6.4.0)@0x159c000->0x19b0fff
            dependency: com.apple.NVDAResman(6.4.0)@0x96e000
         com.apple.NVDAResman(6.4.0)@0x96e000->0xc5bfff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
            dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x961000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x93f000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
10K549
Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 5344089076982
unloaded kexts:
com.apple.driver.AppleUSBUHCI          4.2.0 (addr 0x1437000, size 0x65536) - last unloaded 125829414855
loaded kexts:
com.apple.driver.AppleHWSensor          1.9.3d0 - last loaded 27734116643
com.apple.filesystems.autofs          2.1.0
com.apple.driver.AGPM          100.12.31
com.apple.driver.AppleMikeyHIDDriver          1.2.0
com.apple.driver.AppleHDA          2.0.5f14
com.apple.driver.AppleMikeyDriver          2.0.5f14
com.apple.driver.AudioAUUC          1.57
com.apple.driver.AppleUpstreamUserClient          3.5.7
com.apple.driver.AppleMCCSControl          1.0.20
com.apple.driver.AppleIntelHDGraphics          6.4.0
com.apple.driver.AppleIntelHDGraphicsFB          6.4.0
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.1.6
com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0a1
com.apple.GeForce          6.4.0
com.apple.driver.AppleGraphicsControl          2.10.6
com.apple.driver.AppleLPC          1.5.1
com.apple.kext.AppleSMCLMU          1.5.2d10
com.apple.driver.AppleUSBTCButtons          201.6
com.apple.driver.AppleUSBCardReader          2.6.1
com.apple.driver.AppleIRController          303.8
com.apple.driver.AppleUSBTCKeyboard          201.6
com.apple.iokit.SCSITaskUserClient          2.6.8
com.apple.BootCache          31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.iokit.IOAHCIBlockStorage          1.6.4
com.apple.driver.AppleUSBHub          4.2.4
com.apple.driver.AppleFWOHCI          4.7.3
com.apple.driver.AirPortBrcm43224          428.42.4
com.apple.iokit.AppleBCM5701Ethernet          3.0.5b8
com.apple.driver.AppleEFINVRAM          1.4.0
com.apple.driver.AppleSmartBatteryManager          160.0.0
com.apple.driver.AppleAHCIPort          2.1.7
com.apple.driver.AppleUSBEHCI          4.2.4
com.apple.driver.AppleACPIButtons          1.3.6
com.apple.driver.AppleRTC          1.3.1
com.apple.driver.AppleHPET          1.5
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.3.6
com.apple.driver.AppleAPIC          1.4
com.apple.driver.AppleIntelCPUPowerManagementClient          142.6.0
com.apple.security.sandbox          1
com.apple.security.quarantine          0
com.apple.nke.applicationfirewall          2.1.14
com.apple.driver.AppleIntelCPUPowerManagement          142.6.0
com.apple.iokit.IOBluetoothSerialManager          2.4.5f3
com.apple.iokit.IOSerialFamily          10.0.3
com.apple.driver.DspFuncLib          2.0.5f14
com.apple.driver.AppleProfileReadCounterAction          17
com.apple.driver.AppleProfileTimestampAction          10
com.apple.driver.AppleProfileThreadInfoAction          14
com.apple.driver.AppleProfileRegisterStateAction          10
com.apple.driver.AppleProfileKEventAction          10
com.apple.driver.AppleProfileCallstackAction          20
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOFireWireIP          2.0.3
com.apple.iokit.IOSurface          74.2
com.apple.iokit.IOAudioFamily          1.8.3fc2
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleHDAController          2.0.5f14
com.apple.iokit.IOHDAFamily          2.0.5f14
com.apple.iokit.AppleProfileFamily          41
com.apple.driver.IOPlatformPluginFamily          4.7.0a1
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleBacklightExpert          1.0.1
com.apple.driver.AppleSMC          3.1.0d5
com.apple.nvidia.nv50hal          6.4.0
com.apple.NVDAResman          6.4.0
com.apple.iokit.IONDRVSupport          2.2.1
com.apple.iokit.IOGraphicsFamily          2.2.1
com.apple.driver.AppleUSBHIDMouse          162
com.apple.driver.AppleHIDMouse          162
com.apple.driver.BroadcomUSBBluetoothHCIController          2.4.5f3
com.apple.driver.AppleUSBBluetoothHCIController          2.4.5f3
com.apple.iokit.IOBluetoothFamily          2.4.5f3
com.apple.driver.AppleUSBHIDKeyboard          141.5
com.apple.driver.AppleHIDKeyboard          141.5
com.apple.iokit.IOSCSIBlockCommandsDevice          2.6.8
com.apple.iokit.IOUSBMassStorageClass          2.6.7
com.apple.driver.AppleUSBMultitouch          207.7
com.apple.iokit.IOUSBHIDDriver          4.2.0
com.apple.driver.AppleUSBMergeNub          4.2.4
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          2.6.8
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.6.1
com.apple.driver.XsanFilter          402.1
com.apple.iokit.IOAHCISerialATAPI          1.2.6
com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.8
com.apple.iokit.IOUSBUserClient          4.2.4
com.apple.iokit.IOFireWireFamily          4.2.6
com.apple.iokit.IO80211Family          320.1
com.apple.iokit.IONetworkingFamily          1.10
com.apple.iokit.IOAHCIFamily          2.0.6
com.apple.iokit.IOUSBFamily          4.2.4
com.apple.driver.AppleEFIRuntime          1.4.0
com.apple.iokit.IOHIDFamily          1.6.6
com.apple.iokit.IOSMBusFamily          1.1
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          6
com.apple.driver.DiskImages          289
com.apple.iokit.IOStorageFamily          1.6.3
com.apple.driver.AppleACPIPlatform          1.3.6
com.apple.iokit.IOPCIFamily          2.6.5
com.apple.iokit.IOACPIFamily          1.3.0
081113
Interval Since Last Panic Report: 3787463 sec
Panics Since Last Report:          12
Anonymous UUID:                    32C9008D-3F1D-419E-87F5-94D22BAC66E1
Tue Jan 8 20:23:33 2013
panic(cpu 2 caller 0x9d4c9b): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0x0a2910de 0x00100000 0x00000000, BAR0 0xc0000000 0x7ff5a000 0x0a5480a2, D0, P2/4
Backtrace (CPU 2), Frame : Return Address (4 potential args on stack)
0x55143888 : 0x21b837 (0x5dd7fc 0x551438bc 0x223ce1 0x0)
0x551438d8 : 0x9d4c9b (0xbea28c 0xc5a800 0xbf8e60 0x0)
0x55143978 : 0xaef608 (0x8e24804 0x854f004 0x100 0x2b1f6a)
0x551439c8 : 0xae6601 (0x854f004 0x100 0x551439f8 0x9c4778)
0x551439f8 : 0x16d29a6 (0x854f004 0x100 0x438004ee 0x8517800)
0x55143b38 : 0xb0e2b5 (0x854f004 0x9347004 0x0 0x0)
0x55143b78 : 0x9dde7c (0x854f004 0x9347004 0x0 0x0)
0x55143c18 : 0x9da55b (0x0 0x9 0x0 0x0)
0x55143dc8 : 0x9dc42a (0x0 0x600d600d 0x702a 0x55143df8)
0x55143e98 : 0x970582 (0xc1d00011 0xaa910001 0x20802040 0x55143ee0)
0x55143ef8 : 0xd3257d (0x8e3e000 0x55143f4c 0x0 0x7)
0x55143f58 : 0xd3271a (0x8e0e800 0xd39e54 0x55143f78 0x2a45c9)
0x55143f78 : 0x230235 (0x8e0e800 0x0 0x0 0x0)
0x55143fc8 : 0x2a179c (0x863ea0 0x0 0x10 0x905bb80)
      Kernel Extensions in backtrace (with dependencies):
         com.apple.driver.AGPM(100.12.31)@0xd2f000->0xd39fff
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x93f000
            dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x961000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
         com.apple.nvidia.nv50hal(6.4.0)@0x159c000->0x19b0fff
            dependency: com.apple.NVDAResman(6.4.0)@0x96e000
         com.apple.NVDAResman(6.4.0)@0x96e000->0xc5bfff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
            dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x961000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x93f000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
10K549
Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 1273820200696
unloaded kexts:
com.apple.driver.AppleUSBUHCI          4.2.0 (addr 0x1437000, size 0x65536) - last unloaded 91902192143
loaded kexts:
com.apple.driver.AppleHWSensor          1.9.3d0 - last loaded 24820623038
com.apple.filesystems.autofs          2.1.0
com.apple.driver.AGPM          100.12.31
com.apple.driver.AppleMikeyHIDDriver          1.2.0
com.apple.driver.AppleHDA          2.0.5f14
com.apple.driver.AppleUpstreamUserClient          3.5.7
com.apple.driver.AppleMCCSControl          1.0.20
com.apple.driver.AppleMikeyDriver          2.0.5f14
com.apple.driver.AudioAUUC          1.57
com.apple.driver.AppleIntelHDGraphics          6.4.0
com.apple.driver.AppleIntelHDGraphicsFB          6.4.0
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.1.6
com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0a1
com.apple.GeForce          6.4.0
com.apple.driver.AppleGraphicsControl          2.10.6
com.apple.driver.AppleLPC          1.5.1
com.apple.kext.AppleSMCLMU          1.5.2d10
com.apple.driver.AppleUSBTCButtons          201.6
com.apple.driver.AppleUSBCardReader          2.6.1
com.apple.driver.AppleIRController          303.8
com.apple.driver.AppleUSBTCKeyboard          201.6
com.apple.BootCache          31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.iokit.SCSITaskUserClient          2.6.8
com.apple.iokit.IOAHCIBlockStorage          1.6.4
com.apple.driver.AppleUSBHub          4.2.4
com.apple.driver.AppleFWOHCI          4.7.3
com.apple.iokit.AppleBCM5701Ethernet          3.0.5b8
com.apple.driver.AirPortBrcm43224          428.42.4
com.apple.driver.AppleSmartBatteryManager          160.0.0
com.apple.driver.AppleEFINVRAM          1.4.0
com.apple.driver.AppleAHCIPort          2.1.7
com.apple.driver.AppleRTC          1.3.1
com.apple.driver.AppleUSBEHCI          4.2.4
com.apple.driver.AppleACPIButtons          1.3.6
com.apple.driver.AppleHPET          1.5
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.3.6
com.apple.driver.AppleAPIC          1.4
com.apple.driver.AppleIntelCPUPowerManagementClient          142.6.0
com.apple.security.sandbox          1
com.apple.security.quarantine          0
com.apple.nke.applicationfirewall          2.1.14
com.apple.driver.AppleIntelCPUPowerManagement          142.6.0
com.apple.iokit.IOBluetoothSerialManager          2.4.5f3
com.apple.iokit.IOSerialFamily          10.0.3
com.apple.driver.DspFuncLib          2.0.5f14
com.apple.driver.AppleProfileReadCounterAction          17
com.apple.driver.AppleProfileTimestampAction          10
com.apple.driver.AppleProfileThreadInfoAction          14
com.apple.driver.AppleProfileRegisterStateAction          10
com.apple.driver.AppleProfileKEventAction          10
com.apple.driver.AppleProfileCallstackAction          20
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOFireWireIP          2.0.3
com.apple.iokit.IOSurface          74.2
com.apple.iokit.IOAudioFamily          1.8.3fc2
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleHDAController          2.0.5f14
com.apple.iokit.IOHDAFamily          2.0.5f14
com.apple.iokit.AppleProfileFamily          41
com.apple.driver.IOPlatformPluginFamily          4.7.0a1
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleBacklightExpert          1.0.1
com.apple.driver.AppleSMC          3.1.0d5
com.apple.nvidia.nv50hal          6.4.0
com.apple.NVDAResman          6.4.0
com.apple.iokit.IONDRVSupport          2.2.1
com.apple.iokit.IOGraphicsFamily          2.2.1
com.apple.driver.AppleUSBHIDMouse          162
com.apple.driver.AppleHIDMouse          162
com.apple.driver.BroadcomUSBBluetoothHCIController          2.4.5f3
com.apple.driver.AppleUSBBluetoothHCIController          2.4.5f3
com.apple.iokit.IOBluetoothFamily          2.4.5f3
com.apple.driver.AppleUSBHIDKeyboard          141.5
com.apple.driver.AppleHIDKeyboard          141.5
com.apple.iokit.IOSCSIBlockCommandsDevice          2.6.8
com.apple.iokit.IOUSBMassStorageClass          2.6.7
com.apple.driver.AppleUSBMultitouch          207.7
com.apple.iokit.IOUSBHIDDriver          4.2.0
com.apple.driver.AppleUSBMergeNub          4.2.4
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          2.6.8
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.6.1
com.apple.driver.XsanFilter          402.1
com.apple.iokit.IOAHCISerialATAPI          1.2.6
com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.8
com.apple.iokit.IOFireWireFamily          4.2.6
com.apple.iokit.IOUSBUserClient          4.2.4
com.apple.iokit.IO80211Family          320.1
com.apple.iokit.IONetworkingFamily          1.10
com.apple.iokit.IOAHCIFamily          2.0.6
com.apple.iokit.IOUSBFamily          4.2.4
com.apple.driver.AppleEFIRuntime          1.4.0
com.apple.iokit.IOHIDFamily          1.6.6
com.apple.iokit.IOSMBusFamily          1.1
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          6
com.apple.driver.DiskImages          289
com.apple.iokit.IOStorageFamily          1.6.3
com.apple.driver.AppleACPIPlatform          1.3.6
com.apple.iokit.IOPCIFamily          2.6.5
com.apple.iokit.IOACPIFamily          1.3.0
Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f16
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.10.131.42.4)
Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS545050B9SA02, 465.76 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0237, 0xfa120000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8218, 0xfa113000 / 6
USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfa130000 / 3
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Keyboard Hub, 0x05ac (Apple Inc.), 0x1006, 0xfd130000 / 5
USB Device: Apple Optical USB Mouse, 0x05ac (Apple Inc.), 0x0304, 0xfd133000 / 7
USB Device: Apple Keyboard, 0x05ac (Apple Inc.), 0x0221, 0xfd132000 / 6
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8507, 0xfd110000 / 4
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000 / 3

Hi, Wobble Woo.
The repeated kernel panic you're experiencing is a common issue on the mid-2010 MacBook Pro 15". I have the same laptop and the same issue. It's caused by the descrete graphics card. One solution, albeit a bit disappointing and temporary, is to use an application called gfxCardStatus. It runs in the statusbar and tells you which GPU is running. You can use the application to set your laptop to use the integrated GPU only, which will put an end to your kernel panics. But if you are using applications which require heavy graphics (such as photoshop and most video games), you'll just have to count your luck.
Some other users have had their motherboard successfully replaced. Take it to an Apple Store and ask them to run a GPU test. They should find the error (a manufacture defect, it seems) and replace your motherboard, with or without warranty. I hope this helps.
Regards
Raptor

Wht does my computer screen keeps going dark?

Why does my computer screen keep going dark?

Good. This means that, in your existing account, a setting is bad or .plist file is corrupt. As identifying the rascal may take time, my suggestion is to move data to the new account, must be with administrative privileges. As the contents of each account is unavailable to the other, there are two methods:
- if you have a backup on an external disk, as you should (if not, consider this seriously, do not count on good behavior of hard disks), make a last backup on the existing account, and restore in the other account; when ready, delete the old (buggy) account
- if not, save your settings unto a flash drive; this is a limited backup just to avoid putting back settings for Mail etc. I am satisfied with iBackup (grapefruit.ch), but there are other backup utilitites, Time Machine, for example; TM does not allow limited backup, it works if you have a large external disk. If backup disk is not available, move files to shared folder, which is visibile from both accounts, and from there to the new account.
May seem difficult, in fact it is not. You must just move data from one account to another. Now, take care to new apps you install or new functions you activate. When you notice something strange, that may be the cause of this behavior.

Iphone 4 the screen keeps going dark all by itself. What can I do?

Does anyone know the reason why the screen goes dark all by itself?

First try a Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least Ten seconds... (But can take Longer)... until the Apple logo appears. Release the Buttons
If no joy... Try a Restore...
1: Connect the device to Your computer and open iTunes.
2: If the device appears in iTunes, select and click Restore on the Summary pane.
Restoring > http://support.apple.com/kb/HT1414
Make sure you have the Current Version of iTunes Installed on your computer
iTunes free download from www.itunes.com/download
3: If Unable to Restore, try using the Steps in this article to force the device into Recovery Mode.
Note on Recovery Mode.
You may need to try this More than Once... Be sure to Follow ALL the Steps...
After you have Recovered your Device...
Re-Sync your Content or Restore from the most Recent Backup...
Restore from Backup > http://support.apple.com/kb/ht1766

How to stop an inactive screen from going darker?

I use my ibook to watch DVDs a lot and it's really annoying that the screen goes darker after 2 minutes or so. I assume it's an energy saving thing?
Either way I'd like to turn this function off but I cannot seem to find it in either the screen saver or energy saver settings. Where is it hidden?

Glad to be of help; sometimes you have to click a link or mouse-over it
in here to see what the browser says it is; often I've posted the link to
a proper solution and it gets glossed over because someone else will
later post the same link so you see it (not in an < a href= format.)
[If a suggestion is helpful, only the person who posts the question can
vote if it was helpful and to what degree; this awards "stars" and also
puts a star next to the question in the main menu. This makes them
more helpful to later readers who are looking for answers; including
those who are not registered and only seeking help.]
Another place to try and find answers is MacFixit.com home page
and also their user forums; there is also a link there to VersionTracker.
Best wishes and happy holidays.

Imac screen keeps going black sound present

Imac screen goes black can still hear sounds volume on but blank black screen
can anybody tell me why this happens?

As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...
You are now in a perfect position to do a
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
It is the 5 second timing that initiates the reset.
Here is a link to a Widget to monitor your temps and other operations:
http://islayer.com/apps/istatpro/
http://www.intelmactemp.com/list

My imac screen went half dark, can I fix this myself??

My 24' Imac screen went 1/2 black on top the bottom is fine, can I fix this myself??? HELP

You really should contact Apple or your local AASP and have it checked out.
Apple - Support - iMac - Service FAQ

IMac Screen intermittently goes black

ust recently my iMac screen has started to go black after a few minutes. Usually this happens after my iMac wakes up and I've started to run an application. I can't seem to get the screen to return to normal without rebooting the machine, which seems to fix the problem. I've already verified and repaired all permissions. I've verified the disc and no problems were fund. I've called Apple support and was told it might be a video card. I've run the hardware tests, both short and extensive, and no problems were found.
I have two questions: any suggestions, and can the geniuses at my local bar replace the video card if that's determined to be the problem, or will my iMac have to be sent somewhere?

Welcome to the Apple Discussions!
Video card issues usually require a swap out of the logicboard because the card is usually soldered/glued to the motherboard. They would likely need to order the logicboard.
Have you checked the RAM to be sure that it is seated properly in the slots?
http://support.apple.com/kb/HT1423
Dah•veed

URGENT HELP NEEDED: iMac screen suddenly going half dark?!

Hi..
So earlier tonight I was using my iMac perfectly, then had to stop since I was going out with friends for dinner and to see a performance and when I came back, shook my mouse awake my screen came back on from it's sleep mode and was fine and then the top half dimmed.
I tried messing with the lighting because I thought maybe my roommate's cat may have stepped on it, but it was at 100%. I rebooted, turned it off for 5 minutes then turned it on again and it comes on fully lit for a split second then dims at the top again. It's not black, but you can see that the screen has dimmed a lot. I'm attaching a picture, hopefully you can tell what I mean. It's a kind of crappy phone pic but that's all I have right now.
I bought this iMac in May 2007, so I doubt I have any warranty left and I can't remember or find paperwork to see if I bought apple care protection.
Does anyone know what this could be? I've read on another forum that it might be a back light going out. Any idea how much that would cost me?
Thanks!
Message was edited by: CallyKhS

Well, some questions ?
I'm just another user and no expert, but:
*Might not want to shut it down until you have backed up your data, First!*
1.) Does everything else run good? --if "beach balling" badly, call an expert and I wouldn't shut it down or sleep it.
2.) Is there a hardware test you could run? --each version of OSX generally has something like disk utilities you can run. Try apple's downloads page for useful 3rd party utilities, assuming you can run them o.k. and everything "seems" fine except for screen.
3.) Do you have it plugged into a surge protector? --sometimes they get used up. You could (after verifying hardware and preferably backing up data) try it on another wall socket in another room, to check electrical viability. You might have a bad or dangerous wall outlet. If the wall gets really hot above the outlet, have it checked out immediately. Houses burn down every day from bad outlets and old aluminum electrical wire. (lol, I'm not saying anything bad about your house.....just trying to cover the basics).

Why has my iMac screen become so dark with Yosemite?

The monitor on my (early 2009) 24" iMac used to be overly bright. I had to use Shades to darken it and make it tolerable. Now, after installing Yosemite, it is way too dark and I have no way to make it brighter. The Display brightness control is of little use.
Any comments are most welcome.
Thanks!

Hi crazy,
The computer is in a room with a South facing window directly behind the computer monitor. The shades are usually closed due to the contrast from the window. I used the Mac app Shades for years to darken the monitor and it worked great. However, as I mentioned earlier, when I upgraded to Yosemite, the screen screen brightness was reduced by at least one-half of what it formerly was. I did upgrade Shades, but it is of no use now since its purpose was to darken the monitor. Too bad it cannot brighten the monitor.
I am not certain exactly what you mean my your last statement. Perhaps I answered it in my above comments. Let my know if you need more info.
Here is the link to Shades for your perusal: http://www.charcoaldesign.co.uk/shades
Phillip

1 year old 27"iMac screen keeps going black

itunes is running in the background, nothing I can do except shut off surge protector...
just started happening, mulitple times a day
So NOT happy with Apple, a $3000 machine! really??? their products are not worth the premium anymore!
not reliable!

Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.
If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.

24" 2008 iMac screen going black

My 24" 2008 iMac screen keeps going black then coming back after a while. What temperature would it need to get to in order to knock out the display? I have iStat.
Also, if the screen fails due to graphics card or other component, is it possible to connect an external display to use it until I can upgrade to a mini?
Cheers.

As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...
You are now in a perfect position to do a
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
It is the 5 second timing that initiates the reset.

6288 - screen goes dark after 15 seconds

Hi
Have just purchased a 6288. Screen goes dark after 10 - 15 seconds if you don't touch the keypad - very annoying if reading a message. Have turned Power saver and sleep mode off, but screen still goes dark. Does anyone know how to stop it from doing this?
Thanks

Yes it is quite annoying. The screen saver time out does little to remedy this. A way around it that I use is to reassign the navikeys. you can dictate what each button does :go to menu > settings > my shortcuts > navigation key. my up goes to contacts, left goes to new message, right goes to music player and down does nothing. so every time the screen goes black, I just hit the down key to turn it back on.

Screen Goes Dark when No files Are Open

Hi,
Since I installed the CS 6, I seem to have a problem with my display going dark whenever Illustrator CS 6 doesn't have opened files, i.e., the application runs, no files are open, and my whole screen's brigthness goes down. It only happens with Illustrator CS 6. When I open a file, the screen goes back to normal. Has anyone had that problem?

Unfortunately attempts to take a screenshot to show you have resulted in the interface look as it if were at full brigthness so I can't show you (well unless I edit the screenshot after). But basically the whole screen brightness goes dark until I open a new file. And it only happens with Illustrator CS6. I still haven't been able to solve the issue and I can't find anything on the net about that.

IMac screen simply goes dark

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