Black screen on startup after update

I am using Leopard (clean install) on a 24" aluminum imac. I've had this problem a couple times now. When I install the system updates, it tells me it will need to reboot. I say OK. It says something about needing to reset "boot caches" and then it will reboot. I say OK. It appears to shutdown or attempt to restart, but instead it just sits there at a black screen. I can tell the system is still on, but nothing happens. After a while, I can do a hard shutdown and reboot, and things seem to work OK... until I am asked to do another update. (Leopard just came out, but I've already been asked to do a system update several times now... perhaps its the same one that keeps failing?)

The exact same thing just happened on my 20" iMac G5. Anyone have any ideas?

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Black screen on startup after installing security updates KB293357 and KB2937610 on Win 7 64bit

After installing security updates KB293357 and KB2937610 (both related to .NET) on Win 7 Enterprise 64 bit, my computer fails to start up correctly:
- start up and windows boot screen
- then black screen and computer freezes
The only option to this problem I found so far is do a cold reboot and then let system repair uninstall the updates. Is there a better way to solve this problem?
System:
Asus UL80VT laptop
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Hi,
After you unstall the two updates, does the black screen issue completely disappear? We should first figure out whether the two updates are the culprits.
Since the two updates are related with .net as you mentioned, then here's a .NET Framework Repair Tool released by Microsoft, I suggest you try it and check if it cna detect something.
http://www.microsoft.com/en-in/download/details.aspx?id=30135
Check your event viewer and see if it recorded something valuable.
Yolanda Zhu
TechNet Community Support

Black screen with underscore after updating ubuntu on Lenovo G560

hello everybody, I'm new here. I looked for this problem online during the past few days but I haven't found a solution. I have a Lenovo G560 and I divided my hard drive into two partition, I installed Ubuntu on C:\ and Windows on D:\ and I haven't had any problem, but after updating ubuntu to version 14 my computer couldn't boot anymore. the bios loads and I see the Lenovo icon but then I just get a black screen with an underscore (not a blinking underscore), I tried booting from a bootable USB stick but the same thing happened (I put it as the first device to boot from in BIOS settings). can anyone please tell me what are my other options ? what should I try now ? thanks in advance and have a good day !

Hi s, and welcome to Apple Discussions.
Try this:
Hold down the Option+Command (Apple)PR keys, boot/restart your MBP while continuing to hold down those four keys, and after you hear the startup chime for the second time, release the keys. That should reset your PRAM and resolve the issue.
If the issue persists, while you're booted into Open Firmware, just after the prompt, type in:
reset-nvram
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reset-all
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Black screen on start after update to OS X 10.10.3

Hello,
I updated my Mac Book Air to OS X 10.10.3 and now when I start it the screen is black and after several seconds I get the password screen.
My Mac Book Air is a mid-2013, FileVault is activated.
This behavior started after the update to 10.10.3, and FileVault was already activated.
Could you please give me some help to find a solution and have my Mac Book Air work normally as before?
Thank you all for your help.

Hello again,
I found a trick in order to get my Mac Book Air start normally.
Here it is:
1. I deactivated FileVault.
2. Once the FileVault deactivation process completely terminated, I switched off the Mac Book Air.
3. I restarted the Mac Book Air, it started normally.
4. I reactivated FileVault.
5. Once the FileVault reactivation process completely terminated, I switched off the Mac Book Air.
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Well, I solved the issue by myself, but I think this should not have happened.
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hello,
I have a MBP bought in June 2007
I was trying to upgrade to 10.6.1 and now I got a black screen at startup. Only the keyboard has the backlight on. Nothing on the secreen. What should I do ?
thank you

A place to start might be this article:
http://support.apple.com/kb/HT1573?viewlocale=en_US
It's also possible that you have the NVIDIA problem:
http://support.apple.com/kb/TS2377
If you can't get it working following the steps in the first article, you can contact Apple regarding the NVIDIA repair program.
Good luck!
Message was edited by: S.U.

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Thank you for the advice Randy. Very helpful of you to jump in with a post that adds so much value for the OP.
A bit of advice for you as a new user. Please refrain from making assumptions and using hyperbole. Both get in the way of providing useful support. Not "everyone" has tried the basics, let alone know what they are. That's why they're here. These first steps in troubleshooting often fix the issue being asked. If this thread doesn't answer your question, move on and find one that does. Feel free to skip the thousands that advise a reset.

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Settings > General > Reset > Reset Home Screen Layout
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Equium A100 black screen on startup

Toshiba Equium A100 laptop
Completely black screen on startup so please don't say go into safe mode etc, because I can't.
I can't see a thing.
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Hi
Look not good dude I think its an serious hardware issue
I checked the movie and cannot hear a beep when the notebook passes the POST (power on self-test). So for me it looks like something wrong with the hardware
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HT5706 photos on screen saver gone after update of apple tv

photos on screen saver gone after update of apple tv

Welcome to the  Discussion Forums
Why are you looking in a shared library, is itunes set up as a secondary library.
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I am very disappointed with Apple right now. My early-2008 15 inch macbook pro shows a blank/black screen on startup. The hd runs fine and I can dim and undim the backlight on the screen but it stays black/blank.
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Apple, you know the card is defective so please just replace the card! I'm not asking for any perks or upgrades! Just to be able to use my Macbook Pro that, up until now, I have been bragging about and telling everyone how happy I was to switch over from windows!
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If you experience distorted video or no video . . . take your affected product to an Apple Authorized Service Provider or Apple Retail Store to determine which service and support options are available. If you plan to visit an Apple Retail store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/
No, it has not cost anything in the past.
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That does not mean it's an automatic "no."

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Something appears to have gone wrong while running the updater. Use the MacBook Air's original thumbdrive or the recovery partition(if it's running 10.7 or newer) to repair the internal drive or install a new OS.
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Vista Black screen with Cursor after Startup

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Black screen and looping after installing and updating Mountain Lion on Macbook pro 2011 13 "i5 2.4Ghz

After first installing the new Mountain Lion upgrading Lion on my Macbook Pro was a little slow, so I decided to format and install Mountain Lion via a thumb drive. After installation on my Macbook Pro was restarting all the time and showing a black screen with codes on the screen. I decided to reformat and reset the PRAM, and that seems to have worked. Occasionally a black screen appears with the codes and my macbook restarts again. Last night I updated the Mountain Lion and error and looping retornartam. I thought I had lost all my works, do more entered in the login screen. I turned off my macbook, went to sleep and this morning I called and finally worked Do not know what's going on in my friends' macbook not occur this problem. The macbook them is the 2011 13 "i5 2.0Ghz and another 2010 and they both work perfectly with the Mountain Lion.
Below is the error that occurred this morning after login.
Interval Since Last Panic Report: 1690 sec
Panics Since Last Report:          1
Anonymous UUID:                    67D1DCE1-6759-7BF0-6682-40BCBB09D01B
Thu Sep 20 07:24:10 2012
panic(cpu 2 caller 0xffffff80206b7bd5): Kernel trap at 0xffffff8020687d02, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x00007ccd02000009, CR3: 0x00000000228a6000, CR4: 0x00000000000606e0
RAX: 0x00007ccd02000001, RBX: 0x000000000000003e, RCX: 0xffffff8020cbd000, RDX: 0x000000000000003e
RSP: 0xffffff8110da3720, RBP: 0xffffff8110da3740, RSI: 0xffffff8031ef80c8, RDI: 0xffffff8020cbd000
R8: 0xffffff8031ef7750, R9: 0xffffff8031ef0438, R10: 0xffffff8020cbcc20, R11: 0xffffff814c6e0000
R12: 0xffffff8033b0ec00, R13: 0xffffff8033b0ecb0, R14: 0x00000000000000c1, R15: 0xffffff8031ef0438
RFL: 0x0000000000010296, RIP: 0xffffff8020687d02, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x00007ccd02000009, Error code: 0x0000000000000002, Fault CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff8110da33c0 : 0xffffff802061d626
0xffffff8110da3430 : 0xffffff80206b7bd5
0xffffff8110da3600 : 0xffffff80206ce4ed
0xffffff8110da3620 : 0xffffff8020687d02
0xffffff8110da3740 : 0xffffff802065f445
0xffffff8110da38a0 : 0xffffff8020681b58
0xffffff8110da3bf0 : 0xffffff802065e1b4
0xffffff8110da3c50 : 0xffffff8020a52e4f
0xffffff8110da3d40 : 0xffffff8020a53052
0xffffff8110da3d70 : 0xffffff7fa1e35434
0xffffff8110da3de0 : 0xffffff7fa1e2412f
0xffffff8110da3e10 : 0xffffff7fa1e33afe
0xffffff8110da3e60 : 0xffffff8020a3181b
0xffffff8110da3ea0 : 0xffffff8020a3133e
0xffffff8110da3f30 : 0xffffff8020a2d2d0
0xffffff8110da3f70 : 0xffffff8020a31e99
0xffffff8110da3fb0 : 0xffffff80206b26b7
      Kernel Extensions in backtrace:
         com.apple.driver.AppleIntelHD3000Graphics(8.0)[EAD976F9-7469-3F17-AB8E-6A039213 8DCB]@0xffffff7fa1e06000->0xffffff7fa1e67fff
            dependency: com.apple.iokit.IOPCIFamily(2.7.1)[9901C237-547C-3B52-99DE-C4870A19E2B5]@0xffff ff7fa0caf000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7fa11fc000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7fa11b9000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12C54
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x0000000020400000
Kernel text base: 0xffffff8020600000
System model name: MacBookPro8,1 (Mac-94245B3640C91C81)
System uptime in nanoseconds: 22884276012
last loaded kext at 22356664762: com.apple.driver.AppleMikeyHIDDriver          122 (addr 0xffffff7fa1d76000, size 20480)
loaded kexts:
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AppleHDAHardwareConfigDriver          2.3.1f2
com.apple.driver.AppleHDA          2.3.1f2
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.2.11
com.apple.driver.AppleIntelHD3000Graphics          8.0.0
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.AppleBacklight          170.2.3
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.iokit.IOBluetoothUSBDFU          4.0.9f33
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.driver.AppleMikeyDriver          2.3.1f2
com.apple.driver.SMCMotionSensor          3.0.2d6
com.apple.driver.AppleSMCLMU          2.0.2d0
com.apple.driver.AppleIntelSNBGraphicsFB          8.0.0
com.apple.driver.AppleMuxControl          3.2.11
com.apple.driver.AppleUSBTCButtons          235.4
com.apple.driver.AppleUSBTCKeyEventDriver          235.4
com.apple.driver.AppleUSBTCKeyboard          235.4
com.apple.driver.AppleIRController          320.15
com.apple.driver.AppleFileSystemDriver          3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.2.2
com.apple.driver.AppleSDXC          1.2.2
com.apple.driver.AppleUSBHub          5.2.5
com.apple.iokit.AppleBCM5701Ethernet          3.2.5b3
com.apple.driver.AppleAHCIPort          2.4.1
com.apple.driver.AirPort.Brcm4331          602.15.22
com.apple.driver.AppleFWOHCI          4.9.6
com.apple.driver.AppleUSBEHCI          5.4.0
com.apple.driver.AppleUSBUHCI          5.2.5
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.DspFuncLib          2.3.1f2
com.apple.iokit.IOAudioFamily          1.8.9fc10
com.apple.kext.OSvKernDSPLib          1.6
com.apple.iokit.IOSurface          86.0.3
com.apple.iokit.IOBluetoothFamily          4.0.9f33
com.apple.driver.AppleThunderboltEDMSink          1.1.8
com.apple.driver.AppleThunderboltEDMSource          1.1.8
com.apple.driver.AppleThunderboltDPOutAdapter          1.8.5
com.apple.driver.AppleHDAController          2.3.1f2
com.apple.iokit.IOHDAFamily          2.3.1f2
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleSMC          3.1.4d2
com.apple.driver.AppleGraphicsControl          3.2.11
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.iokit.IONDRVSupport          2.3.5
com.apple.iokit.IOGraphicsFamily          2.3.5
com.apple.driver.AppleThunderboltDPInAdapter          1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.5
com.apple.driver.AppleUSBMultitouch          235.7
com.apple.iokit.IOUSBHIDDriver          5.2.5
com.apple.driver.AppleUSBMergeNub          5.2.5
com.apple.driver.AppleUSBComposite          5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOAHCISerialATAPI          2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
com.apple.driver.AppleThunderboltNHI          1.6.0
com.apple.iokit.IOThunderboltFamily          2.1.1
com.apple.iokit.IOEthernetAVBController          1.0.2b1
com.apple.iokit.IOUSBUserClient          5.2.5
com.apple.iokit.IOAHCIFamily          2.2.1
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOUSBFamily          5.4.0
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.21
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7.1
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0
Model: MacBookPro8,1, BootROM MBP81.0047.B27, 2 processors, Intel Core i5, 2.4 GHz, 8 GB, SMC 1.68f98
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393955353432382D3034302E413031472020
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393955353432382D3034302E413031472020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.81.22)
Bluetooth: Version 4.0.9f33 10885, 2 service, 11 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: Hitachi HTS545050B9A302, 500,11 GB
Serial ATA Device: MATSHITADVD-R   UJ-8A8
USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3
USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfa100000 / 2
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 5
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 7
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0252, 0xfa120000 / 4
Is there a hardware problem?
thank you

Before you upgrade, make sure all your software supports it based on post July, 25, 2012 reports on
http://roaringapps.com/apps:table
Reports prior to this date are unreliable, as they are likely with beta releases of Mountain Lion to developers. Other pitfalls to realize include:
https://discussions.apple.com/docs/DOC-3761

MBP Black Screen on restart after software update

Hello to all, Just after dowloading today's latest updates, iTunes, Safari, something about file exchanges and Apple remote I beleive, there needed to restart and once done, no chime and black screen...
All was perfectly fine just before, and I did backup beforehand.
Tried to reset PRAM, restart in Single user, Safe mode, Installation Disk, all with no success.
I will let it powered off and let it cool down for a while if it can help, but it was not particularly hot when restarted.
Any other suggestions ??
Many thanks !!

I'm having basically the same problem with my PowerBook 1Ghz Aluminum 17". After running the latest security update and latest iLife patches using SU, my system boots to the local Darwin consol login. I can see my HD and all it's files, but I can't get the machine to boot back into GUI mode. Safe mode doesn't work.
This was a newly refreshed system running 10.4.6 and ONLY iLife installed - nothing funky and no 3rd-party apps other than those pre-installed in 10.4.x.
I've booted with the 10.4 DVD, repaired permissions (again) and repaired the drive (reported not needed). Zapping the PRAM doesn't help.
Perhaps I have a lemon because I have had problems with this machine in the past, but only when installing major system updates between 10.3-10.4 with non-apple RAM. I don't think this is the culprit this time as the machine has been functioning fine since the last fresh 10.4 install (with some OWC RAM).
Any ideas? Anyone have tips for what can be done in the console to repair the system?
ARGH
PM G5-Quad 2.5GHz | eMac G4 1.25GHz | PM G4 800MHz | PB G4 1GHz 17 | PM G4 400MH Mac OS X (10.4.5)

Black screen on startup after update

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