Got black screen on start up of iMac help

Got black screen at start up
Help

Hi, see if this can be done...
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.

Similar Messages

  • I have a black screen at start up. Please help

    Can someone help.

    Go step by step and test.
    http://support.apple.com/kb/TS1365
    Note: Steps 5 and 6
    Step 5
    Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
    Best.

  • Imac  have black screen. Start Computer sound come on, no picture. The last time I used the computer I put it to sleep, it never came back.  i tried everything that was suggested including puting in the start up disk.  The disk would not eject.  Some one

    Imac  have black screen. Start Computer sound come on, no picture. The last time I used the computer I put it to sleep, it never came back.  i tried everything that was suggested including puting in the start up disk.  The disk would not eject.  Some one suggested how to remove it and that did work.  Computer going to Apple hospital Tues. July 3,  thank you for all the suggestions.
    Phyllis33

    There is nothing wrong with the OS update.
    Delete ALL your email accounts.
    Restart Playbook
    Put the accounts back and ensure they are all set with PUSH ON.  Manual (push off) will burn battery.
    Similarly delete your wifi connections and add back when required. 
    Turn off wifi is not connected to wifi. 
    Any "hunting for connection" in email or wifi will burn up battery.

  • My Imac 24" goes black screen after start up. Booting from original CD or CMD R don't work, both go black screen

    So, yesterday while playing a game of league of legends my Mac stopped running. After I resetted it, I got black screen after it the chime + loading bal.
    So far I've tried:
    CMD+R => black screen
    Holding shift => black screen
    Holding Alt => chosing the HR, the repair disk, or the original CD to reintsall => black screen
    Holding S => got to the terminal, did the check up, it said it was ok, restarted => black screen
    Took off the power cable, waiting at least 15 seconds, and everything back on => black screen
    Holding Alt Cmd + p + R => black screen after restart
    Removed 1 of the memories, then testen, same with the other one => black screen
    I'm pretty much out of ideas at this point. Anything I've overlooked?

    Any white text?
    Startup - Black Screen/White Text
    Startup – Red Screen
    Startup Issues - Resolve
    Startup Issues - Resolve (2)
    Startup Issues - Resolve (3)
    Restart the computer holding down the command - option/alt - P - R keys before the grey screen appears. Continue to hold until you hear the startup chime for the second time.
    Reset NVRAM/PRAM
    Try a SMC reset. The article covers when this is required, but doing this will not affect anything.
    Reset SMC

  • BLACK SCREEN on start up with 3 beeps, FREEZES when power unplugged, IF IT BOOTS splash screen freezes, OVERHEATING REQUIRED TO BOOT - 0x7B, Event 41 kernel-power

    Issue: One day I unplug the power, the screen freezes and I get frozen music sound. I shut down, start up, I get 3 beeps (1 short 2 long), which indicates a Video failure according to the Thinkpad Laptop beep code list.
    How I solve the issue day-to-day: I turn the heat up - I disconnect the battery and hard drive and plug in the power then turn it on. I will wait until the underneath is searing hot with a blanket blocking the fan's flow of air, I mean way hot because any
    cooler and it won't start. Plug stuff back in, Hard drive first, Battery second, turn off with power button hold, unplug power, replug power. 
    I turn it on, no beeps, it goes past the first Lenovo screen, then gives me a prompt because it "didn't shut down properly" and continue regular startup. What happens next is the Windows logo appears,
    and just as the animated windows logo starts to move (you see 2 small colored dots on the screen), it freezes. I see this every time, I know naturally that it means that the laptop is still too hot to go past that point, so I shut it down and try again. After
    about 5 - 10 tries it will go past the splash screen and into the login area, then it's all fine. 
    Sometimes when I unplug the power from the back by accident it will freeze. By accident I mean that the connector wiggles it's self out easily. This unplug freezing thing started happening about 1 week before the 3 beep black screen problem started rolling,
    so I'm putting 2 together.
           Errors:
    I got a Blue Screen of Death the first time I started it up with the overheating ritual, but I never got it since. It was 0X7B.
    I got another Blue Screen of Death about a week ago, but came as it was on already and I had been using it, and said something about disabling Cache or Shadowing in BIOS. I never got it since.
           Event Viewer events found:
    1. Kernel-Power, Summary page.
    There are critical events for a few things like Kernel-Power, Event ID 41, Task Category (63). There are 19 of them, each day 1 or 2 of them but mostly 1, so this maybe corresponds to my daily ritual.
    "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly."
    2. Kernel-Processor-Power - Event ID 37, task category (7)
    "The speed of processor 1 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 71 seconds since the last report."
    3. LMS - HCMI - Event ID 2, Task Category: none
    "LMS Service cannot connect to HECI driver".
    I came across a very sluggish performing control panel for Nvidia before and after this problem, and I tried installing a newer version, which I had to jump through a few hoops to do, like uninstalling first, not just updating. At first it said that the
    driver wasnt for the system, which was wrong. I made it work somehow, but it was still sluggish. I rolled it back to an earlier driver, and now it works fine. No sluggish performance / slight freeze window thing going on.
                 MSCONFIG.exe, Boot Advanced Options: I have tried twice to change this 1 setting, check box "Number of processors" and change to 2 processors, because I do have 2 processors. I have been able to change
    this in the past, but it does not save the setting now, and I believe this option was selected before I started having problems, and settings did not disappear then.
    What could this be. The small round BIOS battery? The video card like everyone presumes? (I.E. the entire motherboard replacement), Software? The wiggly power input area? (Not enough power getting in?), Firmware of some sort? The BIOS software being wrong?
    SYSTEM INFO:
    Thinkpad T61p 6457-A24, Intel core 2 duo (T7700) 2.4GHz, Intel 120GB SSD 6Gb/s, NVIDIA Quadro FX 570M (256 MB),
    Windows 7 64 bit Home Premium (6.1, Build 7601), BIOS Ver 1.00PARTTBLx
    Display: 1680 x 1050 (32 bit 60 Hz), Integrated RAMDAC, Main driver: nvd3dumx.dll,nvwgf2umx,nvwgf2,
    Version 8.17.12.9688, Date 5/31/2012, DDI version 10, Driver model WDDM 1.1
    Please excuse the small text at the beginning, there isn't an option to un-do that error.

    You are very wrong about that mystified. What do YOU think made my computer work without beeping at all hu? (I bet you're gonna tell me). I figured it out.
    RE-INSTALL WINDOWS 7 OS.
    SOLVED.
    DOESN'T BEEP ANY MORE.
    THAT IS A PART OF microsoft ISN'T IT.
    ::: EGO KILLER 9000 :::

  • I solve my problem of black screen when starting up my Mac pro, namely by the button lighting and then i saw the login screen. Hopefully it works for you too.

    I solve my problem of black screen when starting up my Mac pro, namely by using the lighting button and then i saw the login screen. Hopefully it works for you.

    It was the PRAM.

  • Macbook pro-Freezes with black screen at start up.

    Macbook pro-Freezes with black screen at start up. I've tried inserting the Mac OS X install disc to run the hardware test(Restart and hold down D), But it still does nothing. Just the black screen. Now I can't get the disc out. I've tried holding down the track pad key upon start up but that doesn't work neither.
    What do I do??? Please help.

    Remove the battery to find your serial number in the battery bay. Then you can look your MBP up on EveryMac.com:
    http://www.everymac.com/ultimate-mac-lookup/
    That will give you all the information on your Mac.
    This is assuming that you have the MBP with the removable battery and not the unibody. The unibody has different graphic chips.
    Good luck!
    Message was edited by: S.U.

  • MacBook Pro 2006 black screen on start up

    MacBook Pro 2006 black screen on start up

    Time to take a trip to the Apple store genius bar for a free diagnosis.  It could be a faulty GPU, faulty display or a bad display connection.
    Ciao.

  • I tried to restore from 4.2.1 to 4.3.3 through iTunes my iphone4 was on state after restore it gave error 3194 and my phone got black screen its not getting on what to do to turn on it

    I tried to restore from 4.2.1 to 4.3.3 through iTunes my iphone4 was on state after restore it gave error 3194 and my phone got black screen its not getting on what to do to turn on it

    http://support.apple.com/kb/TS3694#error3194

  • Cannot reinstall windows 10 Technical preview after getting black screen at start. will not let format drive or install

    cannot reinstall windows 10 Technical preview after getting black screen at start. will not let format drive or install

    you may need to use a DVD from an earlier version of Windows or slave the disk to wipe it with disk manager
    Place your rig specifics into your signature like I have, makes it 100x easier!
    Hardcore Games Legendary is the Only Way to Play!
    Vegan Advocate How can you be an environmentalist and still eat meat?

  • Presario f700 black screen at start up,

    presario f700 black screen at start up, if left  to own it flashes hard drive light once fan starts then turns off the starts again can get it to stop this sequence by pressing certain keys but screen always stays black and remote screen does not turn on. Have tried removing memory, hard reset, removed ram, have tested hard drive out of device. Anything else I can try.
    Book says 15secs for a hard reset, one post said 30secs, which is correct

    Hi, 30 secs is the better of the two options there. I am assuming the Hard drive tested fine? You can try turning the computer on with out the hard drive in it and see if you atleast get some text saying not bootable device or if you are able to boot into BIOS. If this does not happen you can switch out the ram chips. (boot with one chip then take it out and boot with the other) see if these work. If these steps fail its more than likly more of a hardware issue with the systemboard.
    While I may work for HP, my posts and replies are my own and should not be mistaken for statments made by HP as a whole.

  • Mid 2010 Mac Pro, Black Screen on start up.  Video works after I turn machine off, let it cool

    My Mac Pro is acting up.
    If I do a reset after its beenruning for a period of time I get a black screen at start up.  I have tried multiple different monitor cables and nothing seems to work.  It does seem to resart and I can here the start up chime but no display.  If I unplug the machine and let cool for 1/2 ~ 1 hour it then turns back on with no problem.
    Processor  3.33 GHz 6-Core Intel Xeon
    Memory  24 GB 1333 MHz DDR3 ECC
    Graphics  ATI Radeon HD 5870 1024 MB
    Software  Mac OS X Lion 10.7.4 (11E53)
    Display is the 27 inch cinema
    Any ideas?  Bad graphics card?

    AC if you used it this once would pay for itself. Same for a good solid UPS - a good one can stop that 1/100,000 surge that takes out a modem (if you filter of course).
    I've known people that never knew you could filter coax cable or dsl and we get enough severe storms it has been, not if it happens, but when.
    Unlike the X1900 which had a air chamber and would cause clogging you really should not need to and be pulling it out to clean dust all that much if at all.
    People have gone through 2 or 3 ATI 5770s and some 5870s due to what are probably design or bad batches especially the first months run.

  • NB 305 black screen on start up

    My NB305N410BL displays a black screen on start up. It had worked fine the prior night. You can hear the "beeps" for the start page but no mouse or image ever. Any ideas on the problem? Thanks, Karen

    Try this, disconnect the battery and charger. Hold the power button for 15 seconds and reconnect everything and turn on the computer...hopefully this helps you fix the issue...

  • I have a black screen at start up on my PowerBook pro. I installed lio

    I have a black screen at start up on my MacBook Pro. I installed Lion and it worked fine.

    emanuelbrown wrote:
    @tjk Thanks! My mother-in-law (also named Barbara, ironically) started having this issue this morning, so I've been looking into this. It seems to be a fairly widespread problem which makes me think that Lion (10.7.x) has exacerbated some issue with the card that may have already been in place. from everything I've seen, its a display-only issue (no data corruption, unless you force reboot). Still very frustrating for folks though.
    Actually, thank you! I'd probably still be beating my head against the wall. That did ring a bell with another link I had stored: http://arstechnica.com/apple/news/2011/08/buggy-nvidia-drivers-giving-2010-macbo ok-pro-owners-lion-upgrade-headaches.ars
    Don't know if it's related or not (and don't have the inclination to read all of them right now), but there it is. Will stay tuned for any new info. Again, good work and thanks!

  • Today, my iPad2 wouldn't delete mail.  Then the screen turned black.  I turned the iPad2 off then on.  Got black screen.  Tried backing up to iTunes.  Got the message "iTunes cannot connect to this iPhone because unknown error occurred (OxE8000065).  Help

    Today, my iPad2 wouldn't delete mail.  Then the screen turned black.  I turned the iPad2 off then on.  Got black screen.  Tried backing up to iTunes.  Got the message "iTunes cannot connect to this iPhone because unknown error occurred (OxE8000065).  Help, please.

    Did you try restarting it by holding down the hold and lock button at the same time until you get the apple logo?  If you already tried that then you should try putting it in DFU mode and doing a restore by following these instructions- http://www.iclarified.com/entry/index.php?enid=1034

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