Imac turns on but screen stays black ?

imac turns on but screen stays black ? i can hear it operating ...

Hope this helps:
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 Widget to monitor your temps and other operations:
http://islayer.com/apps/istatpro/

Similar Messages

My macbook pro will turn on but screen stays black.

My macbook pro will turn on but screen stays black. There is no sound on start up and keys dont light up. I have done all the resets:
I disconnected the computer from the power cord, and from all other cables.
I held down the power button for several seconds to turn off the computer.
I let it sit 5 minutes.
I restarted the laptop while holding down the Shift key and nothing happened.
Holding down Command, Option, P, and R to reset your PRAM and NVRAM
http://support.apple.com/kb/ht1379The only thing I haven’t tried is “floating” the computer. I’m not ready to heat it up to the melting point.
I need lots of help!!! any ideas? Its a MacBook Pro 15” or 17.5” about 5 years old. Its about 2 updates behind (OS: Snow Leopard)

Zane W is giving you good advice. Take it to an Apple store genius bar and have them examine it for free. You then will know what the issues are and then can make informed decisions.
Ciao.

My iMac will not turn on, the screen stays black, makes a whistling sound 3 short, 3 long, 3 short, well maintained while keeping on, what solution do you have?

My iMac will not turn on, the screen stays black, makes a whistling sound 3 short, 3 long, 3 short, well maintained while keeping on, what solution do you have?

For some reason its firmware seems to have been corrupted. Read:
About the Firmware Restoration CD (Intel-based Macs)
iMac (Mid 2007) and later models: About startup tones

IMac starts with fan, screen stays black

When attempting to start my iMac G5 (Ambient Light Sensor), fans come on but screen stays black. A couple minutes later, the fans rev up and run very quickly and loudly. This started happening when:
1. One day the screen showed a green question mark with a message indicating that the computer needed to be restarted in a box
2. Green lines were all across the screen
3. I forced it to shut down by holding down the power button
4. When I attempted to start it back up the fans started but the screen stayed black
5. After a couple of minutes, the fans revved up
This has been happening ever since. One time the computer started to the desktop but everything was frozen. I have reset the PMU, checked the diagnostic LEDs, reset the PRAM-basically everything suggested. Can anyone help? Thanks!

Try the suggestions mentioned in the following Articles:
http://docs.info.apple.com/article.html?artnum=301283 Troubleshooting when there's no picture on the display
http://docs.info.apple.com/article.html?artnum=301733 iMac G5: How to Reset the SMU (iMac G5, the iMac G5 (Ambient Light Sensor), and the iMac G5 (iSight)).
Strongly recommend that you update to OS 10.4.11. Your system info confirms you are still using the basic Tiger OS.

Imac a1225 shimes but screen remains black... what can I do?

imac a1225 shimes but screen remains black... what can I do?

Try smc and pram reset.
See if you can boot in safe mode.
See if you can boot from your lion recovery partition to use Disk Utility to repair/verify your drive (not repair permissions).
OS X Lion: About Lion Recovery
Run Apple Hardware Test.
OS X Lion: Use Apple Hardware Test

Imac G5 20" makes startup sound, and fan kicks in, but screen stays black

Hello. I have read the many similar postings and tried alot of ideas with no luck. Here are the specs on the model:
G5 20"/2.0/512mb/250gb/Super/56k/BT/AP EMC2056 Model A1076
When you push the power button, you get the bootup sound, and the fan turns on. Then 30 seconds later, the fan goes into hyperdrive. The whole time the screen stays black. I have tried resetting the pram, get no sound then. I have tried the internal startup button below the fan housing, and it does NOT have the 2nd button there as it is an ambient light model. So I held the power button and plugged in the power cord, still nothing. When plugged in, the 1st green light lights up on logic board. When I hit the power, the 2nd green light lights up. I have tried an external monitor with the adapter plug and still no picture. I do not even hear the hardrive try to read. Could it be a power supply? What are the other 2 lights on the logic board for, as there are a total of 4? I have not tried to boot from a cd or change the battery yet. I don't know if there is a point in doing that, as the screen remains black. I cannot use a conventional pc power supply tester either. Any other ideas on this situation?

"Could it be a power supply?"
More than likely if everything else possible has been ruled out. Your model G5 had an extension repair program which has long expired for your exact issue. Shame you missed it.
"I have not tried to boot from a cd or change the battery yet. I don't know if there is a point in doing that, as the screen remains black."
You won't know if it will do any good until you at least give it try. You should also run Apple's Hardware Test from the Install DVD #1. The DVD label will tell you which key to boot up from to run the AHT.
A few links to check out:
http://docs.info.apple.com/article.html?artnum=301733 iMac G5: How to Reset the SMU (iMac G5, the iMac G5 (Ambient Light Sensor), and the iMac G5 (iSight)).
http://support.apple.com/kb/TS2094 iMac G5: Troubleshooting when there's no picture on the display
iMac G5 Support
You could also try cleaning the interior of your comp.
See KB Article: http://docs.info.apple.com/article.html?artnum=300205 iMac G5 DIY (Do-It-Yourself) Instructions
iFixit has detailed take apart instructions.
Search YouTube for G5 iMac (your model) “How To” tutorials.
Your final solution may be to take comp to your local Apple Store or an AASP.
Good luck!
!http://i45.tinypic.com/jl0z95.jpg!

Pavilion g6 turns on but screen stays off

My laptop screen will not turn on. I hear the laptop itself turn on but screen does not turn on. This is the second time within a year that I've had problems with this laptop. I've tried the hard reset and tried powering it up without the battery and just the power cord and nothing. Please help! I'm lost on what to try next.

Hi @sanaa0415
Please post the full product number for your notebook. See the following, if you need help with that information.
How Do I Find My Model Number or Product Number?
Is there any sign that the display is getting power, a slight flicker, or a bit of backlighting, to indicate the display is powered?
Do you see anything on the display at all during startup, such as error messages?
Was there anything done to the notebook just prior to the display going out on you? Software or driver updates, new hardware, or anything accidental.
For now check out these pages and see if anything changes.
Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot
Resolving Problems with Notebook Displays (Windows 7 and Windows 8)
Diagnosing a Liquid Crystal Display (LCD) for Damage
Let me know how it goes for you.
Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

Late 2009 27" iMac boots but screen stays black..what's the cause?

When I power up my mac (iMac11,1) I get the familiar "bong" sound and the fans and drives start to spin, but the screen remains black and unresponsive. If I turn the computer on and off often enough I get the screen to light, and once it's on all is good, but as soon as I do a shutdown I have to go through the same process of turning the machine on and off until the screen lights.... anyone know what the cause is? Someone mentioned it might be a logic board failure...if that's the case could I replace it? and if I can replace it can I put a more recent model board in my comp? seeing as they are like $800 a piece Any help is appreciated.
Thanks
Steve
27" i5 imac
12gig ram
OS X Lion

Thanks for the response BGreg
I ran the Apple hardware test and came up with the same error twice, error code: 4MOT/4/40000003:HDD-1313 The last four digits changed but everything else was the same.
According to some other msg boards this error code has something to do with the fan on the logic board and a possible connection to the hard drive overheating due to the dying fan... The fan sounds fine and I can't see how that relates to my black screen but at least it's something. My mac is out of warranty so I'm going to attempt opening it and cleaning and or replacing the fan myself, possibly the hdd as well, it's a lot cheaper that getting a mobo replacement lol $800-$1500, I keep extensive backups of my data so I'm not too worried. Thanks for your input, I'll let you know how the repairs go.
Cheers,
Steve

Mac pro turns on but screen goes black after a while what could be wrong please help!!!

Hello mac community, I am new,
I updated a program today everything was working fine yesterday and now today I was updating PLAY a music engine program it seems to have caused the mac to go crazy. I also updated VE PRO 5 another music program. Everything has gone crazy. It turns on but then then the screen goes black after a while 5-10mins. I managed to get the crash report.
Why is the graphics card all of a sudden effected by program updates.
Sat Sep 28 10:49:06 2013
panic(cpu 20 caller 0xffffff7f80f4775c): "ATICLASS::detectPowerDown: GPU is not found. PCI config access fails!!!\n"@/SourceCache/GraphicsDrivers/GraphicsDrivers-6.36.10/Common/IONDRV/ ATI/IOFramebuffer/ATIFramebuffer/Controller/Sources/R800/EvergreenClocks.cpp:825
Backtrace (CPU 20), Frame : Return Address
0xffffff83d2693a90 : 0xffffff8000204d15
0xffffff83d2693b90 : 0xffffff7f80f4775c
0xffffff83d2693bb0 : 0xffffff7f80f493dc
0xffffff83d2693bd0 : 0xffffff7f8158cbe5
0xffffff83d2693c00 : 0xffffff7f8158677c
0xffffff83d2693c40 : 0xffffff7f80d9ac80
0xffffff83d2693cc0 : 0xffffff7f80d99750
0xffffff83d2693d00 : 0xffffff80005281dd
0xffffff83d2693d70 : 0xffffff8000553deb
0xffffff83d2693de0 : 0xffffff80002ba770
0xffffff83d2693e50 : 0xffffff8000205536
0xffffff83d2693e80 : 0xffffff80002029eb
0xffffff83d2693ef0 : 0xffffff8000274176
0xffffff83d2693f60 : 0xffffff80002c3095
0xffffff83d2693fa0 : 0xffffff80002e4894
Kernel Extensions in backtrace (with dependencies):
com.apple.kext.ATIFramebuffer(6.3.6)@0xffffff7f81585000->0xffffff7f81598fff
            dependency: com.apple.iokit.IOACPIFamily(1.3.0)@0xffffff7f80800000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0xffffff7f80804000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0xffffff7f80d88000
            dependency: com.apple.kext.ATISupport(6.3.6)@0xffffff7f80e02000
com.apple.kext.ATI5000Controller(6.3.6)@0xffffff7f80f30000->0xffffff7f80f5afff
            dependency: com.apple.iokit.IOACPIFamily(1.3.0)@0xffffff7f80800000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0xffffff7f80804000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0xffffff7f80d88000
            dependency: com.apple.kext.ATISupport(6.3.6)@0xffffff7f80e02000
com.apple.iokit.IOGraphicsFamily(2.2.1)@0xffffff7f80d88000->0xffffff7f80daffff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0xffffff7f80804000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
10K549
Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:32:41 PDT 2011; root:xnu-1504.15.3~1/RELEASE_X86_64
System model name: MacPro5,1 (Mac-F221BEC8)
System uptime in nanoseconds: 12612076511
unloaded kexts:
(none)
loaded kexts:
com.audinate.dante.driver.DanteVirtualSoundcard     0.9.3
com.paceap.kext.pacesupport.snowleopard       5.8
com.Areca.ArcMSR 1.3.3
com.apple.filesystems.autofs    2.1.0
com.apple.driver.AppleTyMCEDriver 1.0.2d2
com.apple.driver.AGPM    100.12.31
com.apple.driver.AppleHWSensor     1.9.3d0
com.apple.driver.AudioAUUC    1.57
com.apple.driver.AppleUpstreamUserClient       3.5.7
com.apple.driver.AppleMCCSControl 1.0.20
com.apple.driver.AppleMikeyHIDDriver      1.2.0
com.apple.kext.ATIFramebuffer        6.3.6
com.apple.driver.AppleIntelPenrynProfile   17
com.apple.Dont_Steal_Mac_OS_X    7.0.0
com.apple.driver.AppleMikeyDriver    2.0.5f14
com.apple.ATIRadeonX3000     6.3.6
com.apple.driver.AppleIntelNehalemProfile        11
com.apple.driver.AppleHDA      2.0.5f14
com.apple.driver.AudioIPCDriver       1.1.6
com.apple.driver.AirPortBrcm43xx     423.91.27
com.apple.driver.Intel82574L    2.1.8b1
com.apple.driver.AppleIntelMeromProfile   19
com.apple.driver.AirPortBrcm43224 428.42.4
com.apple.driver.ACPI_SMC_PlatformPlugin     4.7.0a1
com.apple.driver.AppleLPC       1.5.1
com.apple.driver.AppleIntel8254XEthernet 2.1.3b1
com.apple.filesystems.ntfs        3.4
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.driver.AppleUSBEHCI       4.2.4
com.apple.BootCache       31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.driver.AppleAHCIPort       2.1.7
com.apple.driver.AppleUSBUHCI       4.2.0
com.apple.driver.AppleEFINVRAM    1.4.0
com.apple.driver.AppleRTC       1.3.1
com.apple.driver.AppleHPET     1.5
com.apple.driver.AppleACPIButtons 1.3.6
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.IOSCSIBlockCommandsDevice 2.6.8 - last loaded 12365095188
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.iokit.IOSurface 74.2
com.apple.iokit.IOBluetoothSerialManager 2.4.5f3
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.driver.AppleHDAHardwareConfigDriver     2.0.5f14
com.apple.driver.DspFuncLib    2.0.5f14
com.apple.iokit.IONDRVSupport        2.2.1
com.apple.iokit.IOAudioFamily 1.8.3fc2
com.apple.kext.OSvKernDSPLib       1.3
com.apple.driver.AppleSMBusController    1.0.10d0
com.apple.iokit.IOFireWireIP     2.0.3
com.apple.kext.ATI5000Controller     6.3.6
com.apple.kext.ATISupport       6.3.6
com.apple.iokit.AppleProfileFamily     41
com.apple.driver.AppleHDAController        2.0.5f14
com.apple.iokit.IOGraphicsFamily     2.2.1
com.apple.iokit.IOHDAFamily    2.0.5f14
com.apple.iokit.IO80211Family 320.1
com.apple.driver.AppleSMC      3.1.0d5
com.apple.driver.IOPlatformPluginFamily   4.7.0a1
com.apple.driver.AppleSMBusPCI     1.0.10d0
com.apple.iokit.IONetworkingFamily 1.10
com.apple.driver.BroadcomUSBBluetoothHCIController     2.4.5f3
com.apple.driver.AppleUSBBluetoothHCIController    2.4.5f3
com.apple.iokit.IOBluetoothFamily     2.4.5f3
com.apple.driver.AppleUSBMergeNub       4.2.4
com.apple.driver.AppleUSBComposite       3.9.0
com.apple.driver.XsanFilter       402.1
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.iokit.IOUSBUserClient      4.2.4
com.apple.iokit.IOAHCISerialATAPI   1.2.6
com.apple.iokit.IOFireWireFamily      4.2.6
com.apple.driver.AppleFileSystemDriver    2.0
com.apple.iokit.IOAHCIFamily   2.0.6
com.apple.iokit.IOUSBFamily    4.2.4
com.apple.iokit.IOSCSIParallelFamily        2.1.1
com.apple.iokit.IOSCSIArchitectureModelFamily        2.6.8
com.apple.driver.AppleEFIRuntime    1.4.0
com.apple.iokit.IOHIDFamily     1.6.6
com.apple.iokit.IOSMBusFamily        1.1
com.apple.security.TMSafetyNet       6
com.apple.kext.AppleMatch      1.0.0d1
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
Cubase has this error
Process:         Cubase 6 [222]
Path:            /Applications/Cubase 6.app/Contents/MacOS/Cubase 6
Identifier:      com.steinberg.cubase
Version:         6.0.7.364 (6.0.7.364)
Code Type:       X86-64 (Native)
Parent Process: launchd [144]
Date/Time:       2013-09-28 10:50:35.845 +0100
OS Version:      Mac OS X 10.6.8 (10K549)
Report Version: 6
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000012473fd9f
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0   ???                             0x000000012473fd9f 0 + 4906548639
1   dyld                             0x00007fff5fc0c839 ImageLoader::link(ImageLoader::LinkContext const&, bool, bool, ImageLoader::RPathChain const&) + 201
2   dyld                             0x00007fff5fc04d48 dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&) + 118
3   dyld                             0x00007fff5fc08f68 dlopen + 490
4   libSystem.B.dylib                 0x00007fff87a9be40 dlopen + 61
5   com.apple.CoreFoundation          0x00007fff8223eef7 _CFBundleDlfcnLoadBundle + 231
6   com.apple.CoreFoundation          0x00007fff8223de97 _CFBundleLoadExecutableAndReturnError + 1191
7   com.apple.CoreFoundation          0x00007fff822cb30e CFBundleLoadExecutableAndReturnError + 14
8   com.steinberg.cubase                  0x00000001011e8e55 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 69941
9   com.steinberg.cubase                  0x00000001011e93f0 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 71376
10 com.steinberg.cubase                 0x0000000100402690 0x100000000 + 4204176
11 com.steinberg.cubase                 0x00000001011d8e77 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 4439
12 com.steinberg.cubase                 0x00000001011e86b7 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 67991
13 com.steinberg.cubase                 0x00000001011e892e CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 68622
14 com.steinberg.cubase                 0x00000001011e8a64 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 68932
15 com.steinberg.cubase                 0x00000001007c68ab 0x100000000 + 8153259
16 com.steinberg.cubase                 0x0000000100d149c0 0x100000000 + 13715904
17 com.steinberg.cubase                 0x0000000101277b99 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 654969
18 com.steinberg.cubase                 0x0000000100d16dbd 0x100000000 + 13725117
19 com.steinberg.cubase                 0x000000010116b048 0x100000000 + 18264136
20 com.steinberg.cubase                 0x00000001000d39c4 0x100000000 + 866756
Thread 1: Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib                 0x00007fff87aaec0a kevent + 10
1   libSystem.B.dylib                 0x00007fff87ab0add _dispatch_mgr_invoke + 154
2   libSystem.B.dylib                 0x00007fff87ab07b4 _dispatch_queue_invoke + 185
3   libSystem.B.dylib                 0x00007fff87ab02de _dispatch_worker_thread2 + 252
4   libSystem.B.dylib                 0x00007fff87aafc08 _pthread_wqthread + 353
5   libSystem.B.dylib                 0x00007fff87aafaa5 start_wqthread + 13
Thread 2:
0   libSystem.B.dylib                 0x00007fff87aafa2a __workq_kernreturn + 10
1   libSystem.B.dylib                 0x00007fff87aafe3c _pthread_wqthread + 917
2   libSystem.B.dylib                 0x00007fff87aafaa5 start_wqthread + 13
Thread 3: FThread
0   libSystem.B.dylib                 0x00007fff87a95dce semaphore_timedwait_trap + 10
1   com.steinberg.cubase                  0x00000001014f8437 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 3278615
2   com.steinberg.cubase                  0x00000001007c8be0 0x100000000 + 8162272
3   com.steinberg.cubase                  0x00000001014f8eb0 CSOLOISTExtendedAnalysis::~CSOLOISTExtendedAnalysis() + 3281296
4   libSystem.B.dylib                 0x00007fff87b7129a _pthread_body + 24
Thread 4:
0   libSystem.B.dylib                 0x00007fff87aafa2a __workq_kernreturn + 10
1   libSystem.B.dylib                 0x00007fff87aafe3c _pthread_wqthread + 917
2   libSystem.B.dylib                 0x00007fff87aafaa5 start_wqthread + 13
Thread 5:
0   libSystem.B.dylib                 0x00007fff87a95dda semaphore_timedwait_signal_trap + 10
1   libSystem.B.dylib                 0x00007fff87ad4772 _pthread_cond_wait + 1015
2   com.apple.CoreVideo                   0x00007fff82fbade6 CVDisplayLink::waitUntil(unsigned long long) + 252
3   com.apple.CoreVideo                   0x00007fff82fba2a2 CVDisplayLink::runIOThread() + 644
4   com.apple.CoreVideo                   0x00007fff82fb9fe3 startIOThread(void*) + 139
5   libSystem.B.dylib                 0x00007fff87acefd6 _pthread_start + 331
6   libSystem.B.dylib                 0x00007fff87acee89 thread_start + 13
Thread 6:
0   libSystem.B.dylib                 0x00007fff87aafa2a __workq_kernreturn + 10
1   libSystem.B.dylib                 0x00007fff87aafe3c _pthread_wqthread + 917
2   libSystem.B.dylib                 0x00007fff87aafaa5 start_wqthread + 13
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00000001211f4000 rbx: 0x00007fff5fc43ae8 rcx: 0x00007fff5fc019df rdx: 0x00007fff5fbfdd20
rdi: 0x00000001211f4000 rsi: 0x00000001211f4000 rbp: 0x00007fff5fbfe170 rsp: 0x00007fff5fbfdce8
   r8: 0x0000000000000000   r9: 0x00007fff8abcf420 r10: 0x0000000000000000 r11: 0x00007fff8abcf420
r12: 0x00000001224521e0 r13: 0x00000001211f4000 r14: 0x000000012473fd9f r15: 0x00007fff5fbfdcf0
rip: 0x000000012473fd9f rfl: 0x0000000000010212 cr2: 0x000000012473fd9f
Binary Images:
       0x100000000 -        0x1022a4fe7 +com.steinberg.cubase 6.0.7.364 (6.0.7.364) <CFFF5ABF-970D-896D-4A88-78FFF87878C1> /Applications/Cubase 6.app/Contents/MacOS/Cubase 6
       0x10268c000 -        0x1026dcff7 com.apple.audio.midi.CoreMIDI 1.7.1 (42) <E7DBCE93-A637-ABA2-B623-6A76B82EE243> /System/Library/Frameworks/CoreMIDI.framework/Versions/A/CoreMIDI
       0x102704000 -        0x10270aff7 com.apple.agl 3.0.12 (AGL-3.0.12) <014CA38F-CB49-8214-4C16-DF73FC6EFCE1> /System/Library/Frameworks/AGL.framework/Versions/A/AGL
       0x105f00000 -        0x105f89ff2 +com.eLicenser.POSAccess-DLL ??? (1.12.1.0) <66A02345-5109-F38C-1262-D00D8189324C> /Library/Application Support/eLicenser/pos/Synsoacc.bundle/Contents/MacOS/Synsoacc
       0x1170a6000 -        0x1170ccfff GLRendererFloat ??? (???) <38621D22-8F49-F937-851B-E21BD49A8A88> /System/Library/Frameworks/OpenGL.framework/Resources/GLRendererFloat.bundle/GL RendererFloat
       0x11a17a000 -        0x11a30dfe7 GLEngine ??? (???) <BCE83654-81EC-D231-ED6E-1DD449B891F2> /System/Library/Frameworks/OpenGL.framework/Resources/GLEngine.bundle/GLEngine
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I havent had the exact same problem as you but I am having a similar problem where lately I noticed when working in Pro Tools (mainly because I use my mac pro for audio work) or even when on the internet whatever it may be that my screen has been flickering a little bit or gets slightly glitchy.
Yesterday upon startup for the first time the screen went black. Had to do a force shutdown. Unplugged all external devices. Reset everything as well. Slowly checked everything was on the phone with Apple even during the process. Seemed to correct the issue. Then of course I get off the phone, restarted my computer and it goes black randomly again.
Rebooted fine. Checked all my hard disks internal and external, verified and repaired permissions on main drive and clone. Since then nothing yet...But I still feel its either the Video Card or the Monitor as everything else is fully operational.
I plan on taking it in to look at as my applecare is up in November but I cant point my finger on it. And really am trying to avoid lugging the mac pro and monitor in at the same time...(Not the easiest thing with lack of parking in nyc..)
If the display was dying I feel like it would have konked out already.
The funny thing is I have had to replace video cards and monitors in the past but this time I cant quite figure out what the **** is going on.
I am leaning towards the video card as I noticed it flickered a little when opening plug in windows in pro tools or multiple windows in sfari but it doesnt make sense.
Worst part is I cant do a hardware test cause for some reason this computer doesnt have the software installed. It does nothing when I hold down the D button...
I totally baffled but the randomness of this.

HT1461 imac a1200 at bootup screen stays black

At boot-up, everything powers up but monitor screen stays black

Troubleshooting information.
Startup - Black Screen/White Text
Startup Issues - Resolve
Startup Issues - Resolve (2)

Blackberry Q5 keyboard lights up but screen stays black!

When I unlock my Blackberry (Which by the way I only got three days ago) when I haven't used it for 10/15 minutes, the keyboard will light up but it won't unlock? But if I press and hold the power button it will let me shut down or restart the device but it won't take me to the main menu, it either stays black or you get the shut down screen. Anyone know what's going on at all? It's annoying me because I love this phone, it's just this one problem! Thank you in advance!

Try this:
Go to Home screen
Swipe down to get to SETTINGS
Select DISPLAY
Make sure brightness slider is at appropriate level-- I keep it a bit nore than half way.
Make sure ALLOW GESTURES WHEN LOCKED is ON
Make sure ALLOW POWER BUTTON TO UiNLOCK DEVICE is ON
Hit Back arrow (<) and close Settings.
<><

HT3964 Had a power outage. My iMac comes on but screen is black. How do I get the screen to light up again?

Had a power outage and my iMac is on but the screen is black. How do I get it to light up again?

Your system may have suffered hardware damage if not connected to a UPS (Universal Power Supply), you can try doing a SMC reset, please click iMac SMC and PRAM reset for instructions. If that does not work make an appointment at your local Apple Store or AASP. BTW you can find UPS's at your local office supply store.

Screen turns black, computer is running, but screen stays black...

Hi Everybody, i could do with your help...
I will try to discribe the problem,.. if the screensaver comes on after 15 minutes, and i try to wake the computer, the screen turns black, like it would when turned off... you can hear the computer is on and running, but nothing on the screen, touching the mouse pad, or any button on the keyboard will not wake the computer... if i than close the lid, i can see the little white light and when i reopen the lid.. nothing.. sometimes briefly like a millisecond or so, you can see the screen on, but than goes to black again....
Any ideas??
it does not happen when working on the computer, only when it comes out of screensaver, or if left alone for longer than 30 minutes or so.... really strange...
Anyway, your help is appreciated!!!

Harry,
Did this just start happening after your update to 10.6.3? There is a thread over in the OSX Snow Leopard area about the backlight not coming back on after sleep that might interest you. Here is the link ( http://discussions.apple.com/thread.jspa?threadID=2384628&tstart=0 ).
Hope this helps,
BCB

IMac has power but screen is Black

Hello All, I have a 20" iMac Alum 2.0Ghz, Intel, ATI Radeon HD 2400 XT that was working great. Yesterday morning it wouldn't start. First thing I did was check all plugs and verified they were working. Then I unplugged all unnecessary peripherals and checked these discussions for similar problems.
When turning it on, I could feel the HD spinning up, but there was no indicator light on the front bezel. None of the keyboard commands worked, I reset SMC and tried PRAM, removed memory and switched slots(memory was factory installed and never upgraded-1Gig). I unplugged it for a half hour and tried again..No go.
According to the Service Manual for this mac, it was either the ac/dc converter, logic board or power supply. The iMac is still under warranty so I took it to the Apple Store and they concurred with my diagnosis. To my surprise, they called me and said that it was the Graphics Board that failed.
I have two questions, first why was there no indicator light on the front panel? That is for the power supply diagnostics only. The unit was getting power to at least the HD. Next, is the Graphics Card used in startup(single-user mode)? I thought that was all controlled by the firmware. If not, could someone tell me how the Graphics Card plays into the loading of the BSD or pre-graphics startup.
Thanks,
Glynn

If you have to have a smartphone or the Droid, yes, the secondary market is probably your best choice. Just be careful and clear tthe ESN with Verizon before you buy. And do everything else you would do with someone you don't know.

IMac's screen stays black

Went to wake up my iMac, heard the computer running but screen stayed black. I've tried restarting and unplugging and re-starting with no change. Any other suggestions?

If you don't know what a RAM disk is then you're almost certainly not using it. This was a feature in OS 9 to use RAM as very quick disk storage space. It was not enabled by default. Unless you've created a RAM disk (on Apple Menu > Control Panel > Memory) and saved files to it, you're safe).
Take care only to reset the PMU once.
You should probably start a new thread so you get more attention to your issue.
regards
mrtotes

Imac turns on but screen stays black ?

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