IMac screen froze and on restart a black screen appeared.

iMac 21.5 screen w/3.1 Ghz Quad-cor Intel i7, Model A1418 w/16 GB RAM, 1 TB Fusion HD.
I downloaded Yosemite on Friday and appeared to be working fine. When I tried to start it this morning, it froze at a black screen. I powered it down and tried to reboot and it came up with a black screen, a white Apple logo, and a white line signifying that it was booting up. The white line moved about an inch and froze there. I left it running for about an hour, and when I came back the white line hadn't moved. I rebooted it multiple times with the same results.

Try a Safe Boot. Press and hold the shift key at the startup chime until you enter safe boot. I have had occasions where doing that cleared things up when booting into safe boot and then restarting from there. If nothing else if you can boot that way you can do a bit of troubleshooting.

Similar Messages

IMac G5 boots, and then goes to black screen

This is not my iMac, but a friend who is using this that she got from here son who upgraded to an Intel iMac. The hardware is a G5 20 iMac. I don't have any more information since it wont power on....or have the installation disks...
The symptoms are that the machine will power on, "bong" show the blue apple screen, then the spinning lines and then suddenly a black screen and nothing more. I booted to single user via Command-S and ran fsck to ensure the disk was clean. Ir reported no errors, but halfway through the check the fans came on full. Only having experienced an Inetl iMac's fans, they were very load. When the fsck finished (with no errors) the fans turned off again. When i exitied the shell to reboot, the same thing happened again. Black screen and not repsonse.
The fact that I can get to single user shell and check the disks points to most of it working, but I'm confused as to why it gets no further.
ANy help would be appreciated as she want to migrate from her current PC based workflow to a more reliable(!) one, but this isn't helping....
Thanks,
Jimmy

Thanks to the responders for their input. I was fearing the worst. However, it looks like the issue wasn't as serious as a broken capacitor. I don't understand why the following worked, as it's not as if the machine was always not working, but just started.
As part of the diagnostic process, the back was opened and then the memory reseated. After reboot this still failed. Then Command Option O F to get into open firmware and then
reset-nvram
set-defaults
reset-all
and the machine rebooted and came up again.
So far there have been no problems, but it looks like this was the fix.

I was restoring my Ipone 4s and it froze and just has a black screen with apple logo on, I can't do anything with it

I Updated the new Iso 8 when it came out. I lost my wifi connections so tried to update phone to the latest version of ISO and it kept saying connection lost and couldn't download. I was doing this via iTunes because I had no wifi. So I decided to restore my phone, it went through the process and then just froze with black screen and apple logo. iTunes won't find it now. What can I do, argh

Go to this Apple support page. Scroll down to the bottom and follow the steps to put your device into Recovery mode.
iOS: Forgot passcode or device disabled

Lion update, screen froze and won't restart past white screen! HELP!

Did the upgrade to Lion yesterday, everything was fine until today. The screen froze and when I try to restart it freezes on a white screen with the spinning rainbow ball of death! PLEASE HELP!

Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstalling OS X Without Erasing the Drive
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list. Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Alternatively, see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

How to update Bootcamp 3.1 and 3.2 wthin black screen Win 7

Hello,
I was installing Window 7 Ultimate on my iMac and still stuck at black screen with blinking cursor. Read tones of posts and still couldn't fix it. My Bootcamp was 3.0.1, do I need Bootcamp 3.1 then 3.2? I downloaded Bootcamp 3.1 & 3.2, but can't run it as it can only run from Window environment, right? But I stuck at black screen, how to install Bootcamp 3.2?? Any kind advise please.
Thanks

Don't know how many tries on TS3173 and still didn't work for me.
After reading from threads after threads, I got it fixed with following steps:-
Solution 3:
If you applied solution 2 and you still have problems, try the steps below.
Repair startup issues
1. Put the Windows 7 installation disc in the disc drive, and then start your computer.
2. Press a key when you are prompted.
3. Select a language, a time, a currency, a keyboard or an input method, and then 4. click Next.
5. Click Repair your computer.
6. Click the operating system that you want to repair, and then click Next.
7.In the System Recovery Options dialog box, click Command Prompt.
Type (these commands are safe - more information)
Code: Bootrec.exe /FixMbr
Code: Bootrec.exe /FixBoot
Code: Bootrec.exe /RebuildBcd
Press ENTER after each command.
Restart your computer.
(from this thread http://discussions.apple.com/thread.jspa?messageID=11431092&#11431092)
Good luck.

My Ipod touch recently fell into water, but once dried, it worked with seemingly little to no problems. Today, after working for at least an hour, the screen froze and is now not working, but the sounds are still functioning.

I accidentally dropped my Ipod into the lake, at the beach yesterday, but i caught it early and it wasn't too soaked... i wiped it off for the most part, and most of the buttons and the screen worked fine! i was shocked, and there were a few glitches with the camera and the slide button on the lock screen, but otherwise it was greatly intact! so i gave it a rest, put it in my purse, and picked it up fifteen minutes later, and it was working 100% normally again! when i got home a few hours later, i put it in rice for a few hours, taking it out every once and a while to check my notifications... it still seemed to be working perfectly, so i just set it down out of the rice, assuming the moisture was gone. this morning, again, everything was working normally, no glitches, UNTIL, i opened my instagram app, and the screen froze, and it seemed like it had two separate screens, and i held the Sleep button down until the screen went black... then i tried turning it back on, etc. and it still didn't work, and so i plugged it into the computer, holding down the sleep and home buttons, and itunes identified it as in recovery mode, and started updating. i tried again to press the sleep and home butttons, maybe pressing only the home button, because I heard the Siri noise, as well as the charging sound, but the screen was still black.... i checked my iTunes, and lo and behold, it had identified my iPod, and synced it to the computer, as if it were normally functioning. However, the screen is still not working, and Siri is not working either. The sounds may be the only thing that's functioning. Should i send it in?

- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar
Apple will exchange your iPod for a refurbished one for $199 for 64 GB 4G, $99 for the other 4Gs, $99 for the 16 GB 5G and $149 for the other 5Gs. They do not fix yours.
Apple - iPod Repair price
Sometime it takes a little while for the water to damage the iPod.

Apple IMac 27 has a problem. Random black screen. Over 1 year without any fix

Apple IMac 27 has a problem.
Random black screen.
Over 1 year without any successful fix.
IMac 27 10.8.4 (12E55) - bought in 2010
3.06 GHz Intel Core 2 Duo
4GB 1067 Mhz RAM
Graphics ATI Radeon HD 4670 256 MB
The IMac computer screen goes black randomly but the machine still running beyond.
In order to go back to normal i need to awake the computer by hitting with the pointer a hot corner previously created " sleep mode" ( top left ).
..the black screen would come back after one second again..and then again and then again and then again..with different intervals..sometime 2 seconds after the other, sometime as soon as appears the user login screen.
I took the machine to an Apple Store two times over one year, they opened, cleaned it but they didn't replace anything has they could not understand what they real problem was. I was happy for that because they didn't try to make me spend money on something which was not going to solve my issue for sure.
Last time i kindly asked them to inspect everything meticulously, part by part, i left the machine with them for over 2 months. They couldn't understand why this was happening..after couple of weeks, 5 more machines came in with the same problem.
On some of them., upon request of the client they changed the graphic card but apparently this was not the fix, the problem come back again. Apparently changing the graphic card or the screen or else it didn't solve any problem to anyone. I'm almost thinking to "trough it out of the window"..we all spend money for this machines and i think we need to know if Apple is looking in to this or not.
Lately i tried to do an SMS RESET and PRAM RESET, it feels it got better a little but problem still coming back.
Also, all usb devices are disconnected and the problem still there
Below you will see a copy of the console report. I honestly don't understand much of it as i'm not a computer guy.
27/07/2013 11:03:39.837 WindowServer[119]: Created shield window 0xb3 for display 0x04272d40
27/07/2013 11:03:39.837 WindowServer[119]: device_generate_desktop_screenshot: authw 0x7fad92c79dc0(2000), shield 0x7fad92c34370(2001)
27/07/2013 11:03:39.906 WindowServer[119]: device_generate_lock_screen_screenshot: authw 0x7fad92c79dc0(2000), shield 0x7fad92c34370(2001)
27/07/2013 11:03:41.701 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c79dc0(2000), shield 0x7fad92c34370(2001), lock state 3
27/07/2013 11:03:41.702 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:41.704 WindowServer[119]: Created shield window 0xb4 for display 0x003f003d
27/07/2013 11:03:41.704 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c79dc0(2002), shield 0x7fad92c34370(2001), lock state 3
27/07/2013 11:03:41.704 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:45.186 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist[740]) Bug: 12E55: launchd + 95444 [7DCC9489-2DF5-3807-83FA-EF5666EE8078]: 0xd
27/07/2013 11:03:45.208 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist) Throttling respawn: Will start in 10 seconds
27/07/2013 11:03:52.117 WindowServer[119]: CGXSetWindowBackgroundBlurRadius: Invalid window 0xffffffff
27/07/2013 11:03:52.118 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:03:52.118 loginwindow[43]: CGSGetWindowTags: Invalid window 0xffffffff
27/07/2013 11:03:52.118 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:03:52.118 loginwindow[43]: CGSSetWindowTags: Invalid window 0xffffffff
27/07/2013 11:03:53.763 WindowServer[119]: Created shield window 0xba for display 0x04272d40
27/07/2013 11:03:53.763 WindowServer[119]: device_generate_desktop_screenshot: authw 0x7fad92c87490(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:03:53.838 WindowServer[119]: device_generate_lock_screen_screenshot: authw 0x7fad92c87490(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:03:53.880 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c87490(2000), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:03:53.880 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:53.883 WindowServer[119]: Created shield window 0xbb for display 0x003f003d
27/07/2013 11:03:53.883 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c87490(2002), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:03:53.883 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:55.209 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist[742]) Bug: 12E55: launchd + 95444 [7DCC9489-2DF5-3807-83FA-EF5666EE8078]: 0xd
27/07/2013 11:03:55.252 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist) Throttling respawn: Will start in 10 seconds
27/07/2013 11:04:04.482 WindowServer[119]: CGXSetWindowBackgroundBlurRadius: Invalid window 0xffffffff
27/07/2013 11:04:04.482 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:04:04.483 loginwindow[43]: CGSGetWindowTags: Invalid window 0xffffffff
27/07/2013 11:04:04.483 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:04:04.483 loginwindow[43]: CGSSetWindowTags: Invalid window 0xffffffff
27/07/2013 11:04:04.704 WindowServer[119]: Created shield window 0xbf for display 0x04272d40
27/07/2013 11:04:04.726 WindowServer[119]: device_generate_desktop_screenshot: authw 0x7fad92ebdb20(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:04:04.795 WindowServer[119]: device_generate_lock_screen_screenshot: authw 0x7fad92ebdb20(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:04:05.245 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92ebdb20(2000), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:04:05.246 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:04:05.253 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist[744]) Bug: 12E55: launchd + 95444 [7DCC9489-2DF5-3807-83FA-EF5666EE8078]: 0xd
27/07/2013 11:04:05.249 WindowServer[119]: Created shield window 0xc0 for display 0x003f003d
27/07/2013 11:04:05.249 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92ebdb20(2002), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:04:05.249 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
I'm now thinking to try to take the machine to its original firmware and see if it still does it, does anyone have any sugestion?
I use a lot photoshop and other image software, this computer is essential for my work. For more then one year this issue caused me problems.
Luckly i have a Macbook Pro too and i managed to do some of my work there. At last I was thinking to buy an external screen and attach it to the Macbook pro in order to work on my big images. But who wants to spend money again!!!???? This is not a fixture, this is silly. I wish to have my IMAc working again.
The warranty it's obviously over and this problem happened right after the warranty was over...
I write this post because i'm so tired of this issue and online nothing can be found apart from posts from so many people that have the same problem and no fixture has been found.
The only fixture seams to be to buy a new computer... Ole'!!!..new money flowing in in the cashier!! forget it!!! i would rather change company if apple doesn't respond to this.
For over 10 years i have been a Apple owner..
When this problem appears it's like someone it's playing a joke at you...
Comments welcome..
Thanks

Hi, I've seem to have found out the source of the problem.
The issue is related to heat, and an iMac 27" gets hot pretty fast.
If I boot the iMac straight after first start into Windows 7 I seem to get a lit built-in display at all times. I can also boot OS X first and then into Windows 7 and the built-in screen get lit every time as long as the iMac isn't hot.
Strange thing is that the monitor connected to the display port gets lit every time. So I can only assume that the heat only interfere with output to the built-in LED screen.
So this iMac is going to an Apple premium reseller for service, and I'll tell you guys how it went.

My iMac won't wake-up from a black screen...

At random times, more and more often, now, I return to my iMac (Lion) to find it with a black screen. It will not respond to clicks of a mouse, keys on the keyboard, or pressing the power button. I do not have 'hibernate' feature enabled. I leave it at night and the display dims and blanks out after ten minutes. I hit 'esc' in the morning and it pops right up for me, and is fully functional. But when I leave my computer for ten or fifteen minutes during the day, I return to that mysterious non-responsive black screen.
I don't know what to do to eliminate this problem. Is it software? Is it hardware? Is it the operating system? Do I need an appt with the Genius Bar? My computer is only nine months-old.
Help!

When posting in Apple Communties/Forums/Message Boards.......It would help us to know which iMac model you have, which OS & version you're using, how much RAM, etc. You can have this info displayed on the bottom of every post by completing your system profile and filling in the information asked for.
CLICKY CLICK-----> Help us to help you on these forums
***This will help in providing you with the proper and/or correct solutions.***

Satellite A100-646 and external monitor shows black screen

Hello to everybody,
I have a similar problem with A100-646 (bought in Italy). Laptop's LCD and external monitor shows black screen but system boots without other problem. When laptop is not used for a long time (half a year) it work for one week without any problem.
Unfortunately, there is no proper service in a place where I live. Perhaps, there is a problem with power supply.
Is there other idea? Does anybody have a service manual? ([email protected])

It is not easy to find shop where you can order original and new hardware components.
Best source for such parts is definitely eBay where you can buy used but well working components.
Upgrade? You must know that upgrade on mobile computers is not the same as on desktops. Cooling possibilities are not the best and each notebook model has optimized cooling system for original parts. So new graphic card can be more powerful and produce more heat and it is definitely not good for your notebook. So best thing you can do is to replace it with original part.

Trying to update the software into my Ipdad 2 the screen froze and asked me to restore it but unable to restore due to a -1 error need help

trying to update the software into my Ipdad 2 the screen froze and asked me to restore it but unable to restore due to a (-1) error
I need help

If you're unable to do the Restore, go into Recovery Mode per the instructions here.

In the process of reseting phone and got stuck on black screen with spinning logo

in the process of reseting phone and got stuck on black screen with spinning logo
what do I do

Hey amreed2012,
Thanks for the question. The steps in the following resource may resolve your issue:
If you can't update or restore your iPhone, iPad, or iPod touch
http://support.apple.com/kb/HT1808
Thanks,
Matt M.

My ipad froze with my camera screen on and my background on full screen? If I press any button it takes a picture

my ipad froze with my camera screen on and my background on full screen. Every button I push on
it takes a pic. won't shut off either, it takes a pic instead

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

HT4855 iMac mail open and mouse has frozen on screen, new batteries in mouse..no change. turning iMac off and back on ..no change. need advice asap

Imac mail open and mouse has frozen on screen...please advise?

The Mac uses an "All devices active" philosophy with pointing devices and keyboards.
If you have additional pointing devices attached, especially a graphics tablet, it is still directing mouse operations at the same time as the mouse you have your hand on. The end result is the SUM of commands from all such devices.

Why does say"To play the selected item, you must install a later version of the Adobe Flash Player. To download the Adobe Flash Player, go to the Adobe website." when I have the latest Version of it and it's just Black screen with no audio and Video?

Why does say"To play the selected item, you must install a later version of the Adobe Flash Player. To download the Adobe Flash Player, go to the Adobe website." when I have the latest Version of it and it's just Black screen with no audio and Video? (Powerpoint Presentation 2013)

You asked your question on the wrong forum. Try one for the Flash Player

The screen stop and become red then black.

Hello , I have an Iphone 4S and this morning my screen stop and become red then black for the first time , when this apend i lock the phone and can unlock him 1 min after and continue what i was doing. I already tried to do a reboot home bouton and "lock" bouton , still don't work , I made the new update , nothing , I restored my phone and nothing ,the phone don't fall ,it was on the morning so i don't use it a lot (just for music) i just take it out of the pocket unlock it and bam bug ...
What can i do for this ?
Sorry for my bad English

Bump.
Please help, I know this problem has been posted many times but everyone says make your own post and I haven't seen my exact model posted yet.

IMac screen froze and on restart a black screen appeared.

Similar Messages

Maybe you are looking for