Shutdown, Black Screen, iMac still Running

I seem to have come across a problem lately. When I shut down my iMac on Leopard, I go through the regular steps, like the cursor disappearing, and sometimes the spinning wheel appearing, but I've come across a problem that I never had in Tiger and has only appeared recently. After the screen has gone blank, I can still hear the fans and HD whirring inside. Its a good 20 seconds before the computer itself switches off completely. The same also applies to when I restart, it hangs on this annoying blank screen, and takes about 30 seconds for the Mac startup jingle, especially frustrating when I want to launch into Boot Camp.
I've tried some other tips listed in threads, like unplugging all USB hardware and stuff, but I'm still experiencing problems.
Anybody else got this same problem?
Thanks.

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Since installing yosemite my computer/screen blacks out, but still running

Since installing yosemite last week, my computer/screen blacks out, but still running. I have since rebooted everything, started from scratch and utilizing my external drive transferred all files/apps back. Did not help, in fact it is getting worse. Computer screen blacks out every 5 min or so and have to power up again. Also, continue to get Java message updates even after all have been updated over and over again. Any suggestions? Thanks!

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.

Black screen iMac ( 27inch - mid 2011)

Hello,
A friend of mine has problems with his iMac (OS X Yosemite 10.10.2).
He regularly will see a black screen before or after login. Only a black screen, no black screen with a mouse pointer.
Sometimes he will see several black screens a day, and sometimes nothing happens several days.
What we have tried:
Resetting PRAM and NVRAM
Without success, unfortunately. Black screens are still there.
I hope you can help me and my friend.
Thank you.

See the EtreCheck report below.
EtreCheck version: 2.1.8 (121)
Report generated 20 februari 2015 19:42:43 CET
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (27-inch, Mid 2011) (Technical Specifications)
    iMac - model: iMac12,2
    1 3.4 GHz Intel Core i7 CPU: 4-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            4 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1333 MHz ok
        BANK 0/DIMM1
            4 GB DDR3 1333 MHz ok
        BANK 1/DIMM1
            4 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    AMD Radeon HD 6970M - VRAM: 2048 MB
        iMac 2560 x 1440
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:53:6
Disk Information: ℹ️
    Hitachi HDS722020ALA330 disk1 : (2 TB)
        EFI (disk1s1) <not mounted> : 210 MB
        Macintosh HD (disk1s2) /Volumes/Macintosh HD : 1.98 TB (1.64 TB free)
    APPLE SSD TS256C disk0 : (251 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh SSD (disk0s2) / : 250.14 GB (228.92 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    HL-DT-STDVDRW GA32N
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Library/Application Support/Avast/components/fileshield/unsigned
    [loaded]    com.avast.AvastFileShield (2.1.0 - SDK 10.9) [Click for support]
        /Library/Application Support/Avast/components/proxy/unsigned
    [loaded]    com.avast.PacketForwarder (2.0 - SDK 10.9) [Click for support]
Launch Agents: ℹ️
    [running]    com.avast.update-agent.plist [Click for support]
    [loaded]    com.avast.userinit.plist [Click for support]
    [not loaded]    com.teamviewer.teamviewer.plist [Click for support]
    [not loaded]    com.teamviewer.teamviewer_desktop.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.avast.init.plist [Click for support]
    [loaded]    com.avast.uninstall.plist [Click for support]
    [loaded]    com.avast.update.plist [Click for support]
    [running]    com.iobit.AMCDaemon.plist [Click for support]
    [loaded]    com.teamviewer.Helper.plist [Click for support]
    [not loaded]    com.teamviewer.teamviewer_service.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.avast.home.userinit.plist [Click for support]
    [failed]    com.jdibackup.ZipCloud.autostart.plist [Click for support]
    [failed]    com.jdibackup.ZipCloud.notify.plist [Click for support]
    [failed]    com.mackeeper.MacKeeper.Helper.plist [Click for support]
    [loaded]    com.user.UninstallAD.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Programma (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Canon IJ Network Scanner Selector EX    UNKNOWN Hidden (missing value)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Default Browser: Version: 600 - SDK 10.10
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Mobile backups: OFF
    Auto backup: NO - Auto backup turned off
    Volumes being backed up:
        Macintosh SSD: Disk size: 250.14 GB Disk used: 21.22 GB
    Destinations:
        Back-up [Local]
        Total size: 999.86 GB
        Total number of backups: 4
        Oldest backup: 2014-05-21 12:03:45 +0000
        Last backup: 2015-01-12 18:31:32 +0000
        Size of backup disk: Excellent
            Backup size 999.86 GB > (Disk size 250.14 GB X 3)
Top Processes by CPU: ℹ️
        54%    TeamViewer_Desktop
        24%    WindowServer
        15%    Skype
         4%    TeamViewer
         1%    launchd
Top Processes by Memory: ℹ️
    704 MB    firefox
    550 MB    Skype
    275 MB    thunderbird
    223 MB    soffice
    155 MB    com.avast.daemon
Virtual Memory Information: ℹ️
    11.38 GB    Free RAM
    2.88 GB    Active RAM
    1.66 GB    Inactive RAM
    1.25 GB    Wired RAM
    1.91 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Feb 20, 2015, 06:48:56 PM    Self test - passed
    Standard users cannot read /Library/Logs/DiagnosticReports.
    Run as an administrator account to see more information.
Thanks again .

Black Screen iMac Late 2009 Fixed

This is just an FYI as when I had experienced my black screen on my Late 2009 Imac and read so MANY complaints
of people having the same issue I thought I would post my symptoms here. Due to the fact that my 3 year Apple care warranty
had run out I was faced with either bringing it to Apple and have them fix it or fix it myself. Taking it to Apple was out of the question
because of the amount of $$ they feel the need to charge for parts and labor.
I did my research and read many post of so many people having this issue.
Mine started one day whlile I was on my mac..my mac beeped and went black..So I replaced the memory..no biggie.
Then months later my screen would go black for no apparent reason. I would shut down, reset SMC & PRAM..It would come back for a little while
and just randomly go black. I thought maybe heat issue. So I cleaned vents & dust from fans etc.
Finally my Imac got to the point where the second I boot up..the screen would come on and immediatly go black.
I did the recommended things people had suggested.
I shined a flashlight on my mac LCD Panel while it was booted..I could faintly see my desktop folders ETC..
So I thought backlight board may need to be replaced. I purchased a new board, replaced..Not The Problem
I noticed that when booted and screen was black if I pressed the power button a couple of times the screen would come back
long enough for me to turn the brightness all the way down and still see the screen. At least this way I could run Extended Hardware
Test to see if it found any hardware issues. It found none and I ran the test 5 times. I thought this may have been power related
so I then purchased a brand new PSU from iFixit and that was not the problem.
I replaced all the lcd sync cables, temp cables, still not fixed.
Final resort. I purchased a LCD panel ( awesome seller on Ebay) used and in mint condition ( not a blemish). BINGO..
A new LCD fixed the problem. ( I did get silver tape & mylar to replace the stuff I tore off)
I have been running my Imac now for a couple weeks..non stop but I do shut down at night. I have had no issues now at all.
It feels just as nice & smooth and fast as it did from day 1.
What do I have left? A great Machine and some parts I took out as I replaced new ones and the old ones are probably good so I will have those
should my PSU or backlight goes bad. I may pick up a few more parts to have on hand and put away before it gets too difficult to find them.
I hope this helps anyone out there left with a late 2009 Imac..black screen..I am so relieved...

Hi-
Do you notice these smudge marks with the iMac off as well? If so, it is probably just some dirt or a fingerprint behind the glass on the front panel.
Yes, Apple or any authorized repair center can do this. 5 minutes tops. You could probably do it yourself (if out of warranty, which you are not) with a pair of suction cups to lift off the glass.
Again- you are under warranty, so I most certainly wouldn't do that.
Some users post being able to get a replacement iMac while their defective unit is in the shop, but those individuals have either had a history of having problems with their order, or were especially forceful in manner.
Don't count on being able to get one.

Black Screen After Fans Run at Maximum

Hello,
I inherited an iMac and it an issue. It boots up fine but within the first five minutes the fans start to slowly ramp up to full speed. After about five to ten minutes of the fans running at full speed the screen goes black and I lose control of the computer. I cannot see anything on the screen, not even the cursor moving. I am also not able to shut down the computer using keyboard shortcuts. I have to hold down the power button.
The computer actually is still working to some degree after the screen goes blank because I have had a video playing from a USB stick and I could still hear the audio after the screen blacked out. I once had a Youtube video playing via the WiFi and when the screen went black the sound stopped.
I took the computer apart thinking that maybe it was full of dust. There was very little dust and blowing it out did not make a difference.
I have done a SMC reset and and a NVRAM reset and neither made a difference.
I installed a temperature monitor and the following is the output in degrees F a little before the computer goes to a black screen:
AC/DC Supply: 99
Airport Card: 141
Ambient Air: 76
CPU Heatsink: 93
GPU Die: 262
GPU Heatsink: 254
GPU Proximity: 223
Hard Drive Body: 102
LCD Proximity 94
Misc: 103
Optical Drive: 99
When the computer is running properly all four diagnostic LEDs on the logic board are lit. When the display goes black LED number 4 turns off leaving the other 3 on. Based on the Mac diagnostic instructions, if the fourth LED is off the issue is with the LCD panel or there is no video signal being generated.
I suspect that the video card is not working properly due to the high temperatures. It looks like the heat from the die is making it to the heatsink so I think that the thermal paste on the GPU is okay.
The computer is an iMac model EMC2134
OS X 10.8.5
24" Core 2 Duo with ATI Radeon HD2600 256 MB video card
I also ran EtreCheck and the output is below.
I would like to repair the computer even though it is old. I however do not want to bring it in to a repair shop. What do you think is the issue and what leads you to that conclusion?
Thank you,
jbr
EtreCheck version: 2.1.8 (121)
Report generated February 24, 2015 7:56:31 PM CST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information:
    iMac (24-inch Mid 2007) (Verified)
    iMac - model: iMac7,1
    1 2.4 GHz Intel Core 2 Duo CPU: 2-core
    4 GB RAM
        BANK 0/DIMM0
            2 GB DDR2 SDRAM 667 MHz ok
        BANK 1/DIMM1
            2 GB DDR2 SDRAM 667 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information:
    ATI,RadeonHD2600 - VRAM: 256 MB
        iMac 1920 x 1200
System Software:
    OS X 10.8.5 (12F45) - Time since boot: 0:4:59
Disk Information:
    WDC WD5000AAKS-00V1A0 disk0 : (500.11 GB)
        disk0s1 (disk0s1) <not mounted> : 210 MB
        Big iMac (disk0s2) / : 499.25 GB (337.62 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information:
    Apple Inc. Built-in iSight
    Alps Electric Hub in Apple USB Keyboard
        Logitech USB Optical Mouse
        Alps Electric Apple USB Keyboard
             Patriot Memory 7.92 GB
        PATRIOT (disk1s1) /Volumes/PATRIOT : 7.92 GB (7.62 GB free)
    Apple Inc. Bluetooth USB Host Controller
    Apple Computer, Inc. IR Receiver
Gatekeeper:
    Mac App Store and identified developers
Kernel Extensions:
        /Library/Application Support/Kaspersky Lab/KAV/Bases
    [loaded]    com.kaspersky.kext.kimul.44 (44) [Click for support]
        /System/Library/Extensions
    [loaded]    com.kaspersky.kext.klif (3.0.2d239) [Click for support]
Startup Items:
    Panasonic_LPD: Path: /Library/StartupItems/Panasonic_LPD
    Panasonic_MFS_PushServer: Path: /Library/StartupItems/Panasonic_MFS_PushServer
    Startup items are obsolete in OS X Yosemite
Launch Agents:
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.CS5ServiceManager.plist [Click for support]
    [loaded]    com.hp.help.tocgenerator.plist [Click for support]
    [loaded]    com.kaspersky.kav.gui.plist [Click for support]
    [running]    com.logmein.logmeingui.plist [Click for support]
    [not loaded]    com.logmein.logmeinguiagent.plist [Click for support]
    [loaded]    com.panamfs.help.agent.plist [Click for support]
    [loaded]    com.panamfs.secureprint.agent.plist [Click for support]
Launch Daemons:
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.bombich.ccc.plist [Click for support]
    [running]    com.kaspersky.kav.plist [Click for support]
    [not loaded]    com.logmein.logmeinserver.plist [Click for support]
    [running]    com.memeo.Memeod.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
User Launch Agents:
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
User Login Items:
    LMILaunchAgentFixer    Application (/Library/Application Support/LogMeIn/LMILaunchAgentFixer.app)
    magicJack    Folder Hidden (/Applications/magicJack)
    autorun.ico    Windows icon image (/Applications/autorun.ico)
    AdobeResourceSynchronizer    Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
    MemeoAgent    Application (/Library/Application Support/Memeo/Memeo LifeAgent/Agents/MemeoAgent.app)
Internet Plug-ins:
    JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
    FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.1
    AdobePDFViewerNPAPI: Version: 10.1.6 [Click for support]
    Flash Player: Version: 15.0.0.189 - SDK 10.6 Outdated! Update
    AdobePDFViewer: Version: 10.1.6 [Click for support]
    LogMeIn: Version: 1.0.465 [Click for support]
    SharePointBrowserPlugin: Version: 14.4.5 - SDK 10.6 [Click for support]
    iPhotoPhotocast: Version: 7.0
3rd Party Preference Panes:
    Flash Player [Click for support]
    Growl [Click for support]
    StuffIt AVR [Click for support]
Time Machine:
    Skip System Files: NO
    Auto backup: YES
    Volumes being backed up:
        Big iMac: Disk size: 499.25 GB Disk used: 161.62 GB
    Destinations:
        Mars Backup [Local]
        Total size: 499.76 GB
        Total number of backups: 26
        Oldest backup: 2013-04-09 03:34:37 +0000
        Last backup: 2013-06-25 21:20:55 +0000
        Size of backup disk: Adequate
            Backup size 499.76 GB > (Disk used 161.62 GB X 3)
Top Processes by CPU:
         5%    mds
         4%    WindowServer
         3%    mdworker
         2%    Memeod
         1%    kav
Top Processes by Memory:
    283 MB    kav
    215 MB    firefox
    47 MB    mds
    47 MB    Dock
    43 MB    WindowServer
Virtual Memory Information:
    2.24 GB    Free RAM
    1.27 GB    Active RAM
    268 MB    Inactive RAM
    518 MB    Wired RAM
    324 MB    Page-ins
    0 B    Page-outs
Diagnostics Information:
    Feb 24, 2015, 07:50:04 PM    Self test - passed

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 loosened. Reinstall the RAM grille. Plug in the keyboard and mouse if not bluetooth. 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/

Black screen imac, diagnosis test

Hi,
I have an iMac 21'' of 2011. I turn it on but the screen stays black.
I have done the following recommendations after some search in different forums:
Command (⌘), Option, P, and R at when I turn on the computer. The chime sound has been heard 3 times
I checked weather the brightness was very low that I couldn't see the screen.
The computer turn's on, and fortunately I managed to login in remotely through team viewer, though the screen is still balck. I'm trying to check whether there is a problem with the graphic card or the display itself before I ask help from an apple store.
Unfortunately I don't have currently a thunderbolt monitor to plug into the iMac and check whether the graphic card is working or not.
I was trying to find a diagnostic tool, and I have found out that there is the Apple Hardware Test Over the Internet, and you just need to press Option+D at the beginning. As my monitor stay black and I don't have another monitor I can't do something like that. I wonder if there is any diiagnostic tool that I could run through MacOSX
Thanks in advance

I have tried what you said but nothing happened. I did the following:
Boot to single user mode (hold ⌘ S while powering on the Mac)
Type and hit return: /sbin/fsck -fy (ok, no errors)
Type and hit return: /sbin/mount -uw / (ok)
Type and hit return: rm /Library/Preferences/com.apple.loginwindow.plist (ok)
Type and hit return: rm /Library/Preferences/loginwindow.plist (it doesn't exist)
Type and hit return: rm /private/var/db/.AppleUpgrade (it doesn't exist)
Type and hit return: reboot (ok)
I have found the following link as well
https://www.ifixit.com/Answers/View/168324/LCD+Backlight+not+working+%3D+solved
I haven't tried it yet but from a quick look it says that it might be the LCD panel or the SATA/Board Logic board. However when I put flashlight on the screen I don't see anything as it's being said in the article.
What I could do is trying to connect it with an external screen. Is it necessary to have an adapter thunderbolt to hdmi or vga or there is another way as well?

Black screen and fan running full- bore

Computer was running fine when I closed the lid (no shutdown) to put it to sleep for the night. Next morning as usual I opened the lid but the screen showed no signs of waking up. The battery was apparently dead so I plugged it in. Pushed the power button and the fan came on full-bore and the screen never showed a sign of coming to life. Restart, no help. Attempted to zap the PRAM but no signs that the key commands were recognized. (2 month old keyboard after the computer took a nasty fall and the old one popped out damaging the ribbon cable connector). Inserted a disk I thought would allow the computer to boot off of, it did some spinning but no change in computer's operational status. Eject button or key commands now fail to get the CD out. The only way to restart is to press power button until computer goes off then press again to start. The fan just keeps on running but nothing on the screen.
Connected computer to external monitor, no help, even after restarting. The monitor is connected to a G4 platinum tower so I know it works.
I also don't see a way to eject the inserted CD manually as command E, eject button, won't eject it.
I'm at a loss! First time a Mac has gotten the best of me. None of my years of little trick gathering has helped.

I tried holding down the trackpad button (forever), no help.
Was the computer all the way off (no lights, fan, sounds, etc.)?
Hold down the power button for ten seconds to shut everything off. If that doesn't do the trick, unplug the power adapter and remove the main battery. Then put them back, hold down the trackpad button, and start up. Is your CD ejected this time? If not, shut everything down again.
If it's a bootable CD, try booting to it after resetting the PRAM: hold down the p and r keys while starting up, and keep holding them down until you've heard three or four startup chimes (if you hear any). After the chimes, release those keys and immediately press the c key to force the PB to try to start up from the CD. Any luck? If the CD isn't a bootable one, of course there's no point in trying this step.
I tried restarting in the firmware mode (command, option, O, F), no help.
I don't know anything about that, so I'm no help with it either.
Before the black screen problem I noticed the battery would run down to zero overnight when the lid was closed and computer was sleeping. I'm not sure this is normal.
Definitely NOT normal, and this is undoubtedly a clue to what's wrong. Something is allowing the battery to drain when it shouldn't. (Batteries, actually, since the backup battery will also drain completely within 10-15 minutes after the main battery, if no AC adapter is connected.) This strongly suggests a short circuit to me. But tell me: do you always leave the Powerbook sleeping on battery power overnight, without the AC adapter connected? Or does the battery drain even with the adapter connected? That would point to a fault in the adapter or in the charging circuitry inside the Powerbook.
A short circuit might leave marks on the surfaces that are coming into contact and shouldn't be. Check the inside of the bottom panel, the logic board surface components, the underside of the keyboard, and whatever else you can see for visible signs of shorting. If you can see that something has been shorting against the inside of the bottom panel, as has occasionally been reported here, cover the affected spot with a small piece of electrical tape to insulate it. Tighten all visible screws — you'll need Phillips #0 and Torx #8 drivers. Look for empty screw holes: a screw wandering around loose inside could cause untold damage.
My AC adapter appears to work fine, it, like the battery, is only a couple of months old. Thing ringlight shows normally.
By "normally," do you mean orange while charging, green when the battery is fully charged, and never flashing, red, or off? That's what normal is.
If you haven't tried to recharge your internal backup battery as described in step 6 of the "Testing Backup Battery" article I linked above, do. Of course you won't be able to see or set the date and time or verify that the battery has been charged, but you can at least do what is supposed to charge it and hope for the best. Again, if it is discharged and hasn't been recharged in the course of all your machinations so far, everything else you do is doomed to fail until it gets recharged.
If after that nothing has changed, you might try disconnecting the backup battery from the logic board. Doing so will sometimes allow a PB to start up that has been prevented from doing so by a stone-dead backup battery. Consult the iFixit Guide for your particular Tibook model to find out exactly where the backup battery connector is in it. In my 1GHz Tibook, it's a small white connector under the right-hand Shift key, with red, white and black wires attached.
If none of this helps, I'm afraid you're due for a trip to the repair shop.

Black Screen trying to run Boot Camp (XP) with 10.6.8 on a macbook pro

running 10.6.8 on a 3 year old macbook pro. boot camp with xp used to work no problem. i played and beat fallout 3 on it. now it gives me a black screen when i boot up. no sound. no flashing cursor. i ran parallels today and it accessed my drive and everything is there. but when i try to boot into boot camp it fails. anyone have any ideas? ive seen all of the advice for people on imacs or running windows 7, etc.
super bummed. want to play skyrim.
thank you!
damian

something similar has been happening to me for a a couple weeks (even before the most recent update, but now is definitely worse) on my 2010 MacBook Air. Firefox freezes upon startup, and then freezes maybe every twenty minutes or so when I'm actively using it, staying frozen for at least a minute or two. it drives me crazy.

Black screen, but still lit

I changed the battery thing a few times from "better performance" to "energy saver” about 4 times over a period of a few hours, it would act like it was switching from the regular screen to the screen saver, but the screen saver never came up. And sometimes this would happen while I was working, so it shouldn't be going to the screen saver at all. The screen would be black, but still lit up. I tried to press buttons to get it to the desktop, but it wouldn't do anything. It was in between asleep and awake. I had to restart it by holding down the power button.
The next day, I changed the battery setting again to try to fix it, but it did this same thing in a shorter amount of time (like 5 times in 5 minutes) The last time, it started "breathing" like it was turning on, but it never actually came on. I had to disconnect the battery to get it to stop.
Then, this morning, it worked fine for a few hours, but again while I was working, it did the same thing. I just restarted it again, but this time it didn't even come on. It went straight to the dark, lit screen. I turned it off and waited awhile. The next time I tried it, it went straight to the dark screen.
So, each time I would try it, it would boot less and less before finally dieing. The whole time the battery was fully charged. It would do it when it was plugged in and when it wasn't. I could hear the computer running.
Any comments? I just don't know what's wrong or what to do. From reading this, I think it would be the failed logic board problems with the battery problems, but like I said, the whole time the battery was fully charged.

I demonstrated this behavior at the Apple Store on 11/2/2013 on my machine and in their test environment. It is easy to reproduce and easy to avoid. I've provided details in this thread: https://discussions.apple.com/thread/5475679.
When the display turns off, it goes through three stages: 1. the screen dims, 2. the screen goes black, 3. the keyboard backlight turns off. Tapping the spacebar or swiping the trackpad anytime during stage 1 will reset the timer. Tapping the keyboard or swiping the trackpad during stage 2 will freeze the black screen with the keyboard lit up. Waiting until stage three to tap the spacebar will wake up the display and everything is fine.
There is less than a one-second window between stages 2 and 3 while the screen is black but the keyboard is still fading that touching the input devices will hang the machine.
This can be reproduced on all mid-2013 MBA's, fresh out of the box, running Mountain Lion or Mavericks. Getting a new machine will not fix it, unless they do a hardware upgrade to fix it.

My mbp always hang (black screen but still keyboard light)(snow leopard and lion) and self hang and restart(mountain lion), How can I do? (I report problem to apple for 100 times but no reply)

I use mbp late 2010 (MacBook Pro (15-inch, Mid 2010) Serial Number: W802627ZAGZ)
(core i7 2.66GHz. 15" 4GB 1067 MHz DDR3) and change display to highres (1920x1080)
it has problem that the screen go blank (or black screen) but keyboard still light. seems to display driver stop working.
I send my mbp to service but they said no problem about hdd.??? I'm not sure that they take care just only hd problem but not handle another problem that I tell him.
I use it and it still hang up (not it reach 100 times errors) how can I do with this problem?

baltwo wrote:
Can't recall which I used to do the dynamic repartitioning.
I'm betting that it was originally Partitioned with Snow Leopard.
As a test I just added a second Partition with Mountain Lion to a FireWire HD and it would not let me Install Snow Leopard from my System or Retail Disc into the Partition.

IPod nano (5th Generation) Black Screen but still plays Music

Problem:
I see a black screen and no backlit normal screen - there's a faint Apple Logo when the device is turned on.
I can navigate the scroll wheel and hear the audible "clicks" when circling the scroll wheel.
I can push play and it will play music just fine. FF, Rewind, Menu, Play/pause all work correctly.
Tried the following:
Menu + Select + held down for 5-10 seconds. faint apple logo dissapppears then I push Play and it re-appears. Still plays music just fine but screen still black with faint apple logo and no back light.
Restore Factory Settings via iTunes. It erased all media. put a song on there to test. can play song but same issue (no back light OS, just black + faint apple logo on the display)
Tried Rewind + select to enter diagnostics - nothing happens, same issue
Please help.

Hi yning_,
If you are having issues with the display on your iPod Classic, you may want to go through the steps listed in the following Troubleshooting Assistant to see if they resolve your issue:
Apple Support: iPod Classic Troubleshooting Assistant
http://www.apple.com/support/ipod/five_rs/classic/
Cheers,
- Brenden

Bootcamp Black Screen iMac 27" (Late 2012) GTX 680 Drivers?

This is easy, same problem for everyone.
Using bootcamp to install windows 7 from an .iso in a USB (just because there is no DVD drive anymore on the iMac), after restart the imac a black screen come up and nothing happen.
I think this is because the drivers for the GTX 680 MX 2GB is missing on the USB.
Where to get them and how to fix this problem?
the solution that apple has right here http://support.apple.com/kb/TS3173 it doesn't work at all, just because the driver that you download from there is for an ATI Graphic card.
How to fix this please.
I bought this very expensive imac because it is so powerfull and I want to use designing software with windows and use at the same time mac OS.
Please don't tell me about Parallels or VMware xD.
Thanks a lot
Regards

Hey, I ran across this, sounds like unplugging it might make the difference? going to try tommorrow, best of luck https://discussions.apple.com/thread/4688499?start=0&tstart=0

How do I get my imovie to have a black screen when not running instead of a picture

I have an imovie I produced myself, but when it is static the picture is of me and it is aweful. I want to know how I eather creatye a blank screen for the movie when in standby, or can I add a different still image to the front to remove my ugly mug. Thanks

you can simply delete the section you want and add text but delete the text so its plain black or go to google, google images black screen and pick one and add it over where it shows you by draging from desk top straight into ur video and select cutaway.
If its a part of a long clip...
Get to the part right before it shows you and press (command shift S) than where you want it to pick back up agin do same thing. than delete or comand delete the section of u... (than read above and insert one of those in its place!)

Black Screen imac 27" - Error report

Hello there
Our family imac went to 'black' a couple of weeks ago whilst my son was using it. Despite attempts to resurrect it with apple support over the 'phone, the black screen persisted and it was recommended to take it in for assessment and repair. It has been sitting switched off and unplugged for a couple of weeks. I was about to 'box it up' to take it to the shop, but thought I'd give it one last try. I managed to extract this error report before it crashed to black again. I wondered if anyone could decipher it for me? We've had macs for 20 years, and this is the first time I've been unable to retrieve it myself.
com.apple.iokit.IOUSBMassStorageClass    3.0.3
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.IOFireWireFamily    4.4.8
com.apple.iokit.IOSCSIArchitectureModelFamily    3.2.1
com.apple.iokit.IOUSBUserClient    5.0.0
com.apple.iokit.IO80211Family    420.3
com.apple.iokit.IOAHCIFamily    2.0.8
com.apple.iokit.IOEthernetAVBController    1.0.1b1
com.apple.iokit.IONetworkingFamily    2.1
com.apple.driver.AppleEFIRuntime    1.6.1
com.apple.iokit.IOHIDFamily    1.7.1
com.apple.iokit.IOUSBFamily    5.1.0
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.sandbox    177.11
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: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i5, 2.66 GHz, 8 GB, SMC 1.54f36
Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1067 MHz, 0x02B5, 0x000000000000000000000000000000000000
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1067 MHz, 0x02B5, 0x000000000000000000000000000000000000
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: AirPort, AirPort, en1
Serial ATA Device: ST31000528AS, 1 TB
Serial ATA Device: OPTIARC DVD RW AD-5670SC, 5.01 GB
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfa140000 / 5
USB Device: USB Optical Mouse, 0x046d (Logitech Inc.), 0xc077, 0xfa143000 / 8
USB Device: USB Keyboard, 0x0603 (Novatek Microelectronics Corp.), 0x00f2, 0xfa142000 / 7
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa120000 / 4
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 3
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 6
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd110000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3
Thanks, in anticipation :-)

There is nothing meaningful in that information.
You can try these provided you can here a chime:
Resetting your Mac's PRAM and NVRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
If nothing helpful occurs, then make a Genius Appointment and take it in for service.

Black screen when I run some games

HI,
I have an up to date release of Archlinux :
$ uname -a
Linux XXXXXX 3.0-ARCH #1 SMP PREEMPT Wed Aug 17 21:55:57 CEST 2011 x86_64 Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz GenuineIntel GNU/Linux
$ pacman -Qs nvidia
local/lib32-nvidia-utils 280.13-1
NVIDIA drivers utilities and libraries. (32-bit)
local/libcl 1.0-1
OpenCL library and ICD loader from NVIDIA
local/libvdpau 0.4.1-1
Nvidia VDPAU library
local/nvidia 280.13-1
NVIDIA drivers for linux.
local/nvidia-utils 280.13-1
NVIDIA drivers utilities and libraries.
local/opencl-nvidia 280.13-1
OpenCL implemention for NVIDIA
When I run some games like armagetronad (from community repo) or redeclipse (from AUR), I find myself after a few seconds (time variable) with a black screen and the system stopped responding, that's like it was a standby mode, impossible to return to the desktop or even to switch consoles.
I do not encounter this problem with other games like OpenArena or wormux.
Note that I have two monitors with the same resolution installed on my machine.
Thanks !

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 2560 x 1024, current 2560 x 1024, maximum 2560 x 1024
default connected 2560x1024+0+0 0mm x 0mm
2560x1024 50.0*
Last edited by blueicefield (2011-08-23 12:46:21)

Shutdown, Black Screen, iMac still Running

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