My Imac turns black with this "_" symbol on top of left corner

Imac 2011 21.5"
this happens during I installing windows 7 boot camp,, during that time,, my imac get hang and cant install,, i restart n suddenly it turns black with "_" symbol,, the installer cd is still in my i mac,,

Turn off the iMac.
Turn it on and press alt/option key. Keep it pressed until you see the OS X boot disk. Select it and it should boot OS X.

Similar Messages

  • Why is my iphone screen turning black with the apple symbol?

    My iPhone 3GS has been randomly blacking out to the screen with the apple symbol or just a blank white screen and will remain frozen like that.  I have reset it pressing the home and power button but most times the screen returns to the apple symbol and the phone does not load.  A few times the screen has just been showing random html code when I reset it.  Sometimes it gets back to my log-in screen but then kicks me back out.

    Is your phone by chance jailbroken? If not then you may have to make a genius appointment and have them check it out. Also try restoring the phone as a new phone and see if that fixes the problem.

  • My camera ***** after upgrating to ios 7.0.2. It turns black with the back camera.does anyone experienced this?

    My camera ***** after upgrating to ios 7.0.2. It turns black with the back camera.does anyone experienced this?

    Hi, chen zhuang. 
    Thank you for the question.  This article will help your troubleshoot the camera issue with your iPhone.  See the section labeled Camera is not functioning.
    iPhone: Hardware troubleshooting
    http://support.apple.com/kb/TS2802
    If none of the solutions in the article resolve the issue, see the section labeled Issue not resolved.
    Cheers,
    Jason H

  • Some pictures in I-Photo seem to be corrupted. When I click on them, the photo comes up for a second, then the picture turns black with a white fuzzy circle inside it and what looks like an explanation mark. Some older, some newer,  no common thread.

    Some pictures in I-Photo seem to be corrupted. When I click on them, they come up for a second, then turn black with a white circle in the middle and what looks like an explanation mark. There does not seem to be any rhyme or reason to the photos that are a problem, some older ones, some newer, some albums have none, some albums have a lot.
    Thanks,
    Mark

    time to time (when I have a chance), I will go to Finder, bring up ALL Images and start going through them to label them (before I put a label on them, they are simply listed as 123 jpg, 124 jpg etc.).
    You're damaging the Library doing that, and that's the cause of your problem.
    Never, ever, ever use the  All Images search and work on items in yoyr iPhoto Library. They must only be accessed via the iPhoto window.
    Restroe from abck up or try rebuild the Library:
    Download iPhoto Library Manager and use its rebuild function. (In early versions of Library Manager it's the File -> Rebuild command. In later versions it's under the Library menu.)
    This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
    Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
    Next: You need to learn how to use iPhoto. There's no need to be dragging things to the desktop:
    For help accessing your photos in iPhoto see this user tip:
    https://discussions.apple.com/docs/DOC-4491

  • My iphone 4 got damp last night and this morning it is locked with a lock symbol in the upper right corner.  How do I unlock my phone?

    My iphone 4 got damp last night and this morning it is locked with a lock symbol in the upper right corner.  How do I unlock this so I can use my phone?

    The orientation lock was turned on by someone. See https://sites.google.com/site/appleclubfhs/support/advice-and-articles/locking-o rientation

  • Weird parts of screen and icons turning black with white bands?

    So I've been getting these weird flashes on my screen, mostly when using the internet, but also sometimes icons appear similar to the flashes as pictured below... it should be the calculator app icon but instead it's black with white streaks.
    Or here's the link for a better view:
    http://picasaweb.google.com/lh/photo/4ldthLn49zAmGLhSypdgog?feat=directlink
    I see it mostly when loading a page on the internet... for a split second the whole frame turns black with white horizontal streaks. I tried to get a screen capture of it but it happens too fast. The whole monitor doesn't turn black, just the window I'm using.
    I did a little research and think it might be screen artifacts and maybe my graphics card is going bad... but can someone confirm or deny this? Does it sound like something else? It seems to be getting worse... so I want to get it taken care of.
    Any help would be great.
    Here's my graphics card info... *i think*
    GeForce FX 5200:
    Chipset Model: GeForce FX 5200
    Type: Display
    Bus: AGP
    Slot: SLOT-1
    VRAM (Total): 64 MB
    Vendor: NVIDIA (0x10de)
    Device ID: 0x0321
    Revision ID: 0x00a2
    ROM Revision: 2060

    Boot off your original G5 Install Disk while holding down Option/alt key to select AHT, then run the extended Apple Hardware Test.
    It sounds like the Video card, but you might also Get Temperature Monitor - 4.51 to see if it's heat related...
    http://www.versiontracker.com/dyn/moreinfo/macosx/19994
    And/or iStat Pro...
    http://www.islayer.com/apps/istatpro/
    If you have any temps in the 70°C/160°F range, that's likely it.

  • HT3275 Hi, I have backed up 2 IMACs and one Mac Book Pro but for some reason, the 3rd IMAC come up with this problem: The backup disk image "/Volumes/Data/Anthony's iMac.sparsebundle" could not be accessed (error -1). Why? They computer system is up to da

    Hi, I have backed up 2 IMACs and one Mac Book Pro but for some reason, the 3rd IMAC come up with this problem: The backup disk image “/Volumes/Data/Anthony’s iMac.sparsebundle” could not be accessed (error -1). Why? The computer system is up to date and I have had no issue with the other computers, just this one.
    Many thanks
    Anthony

    Try this Discussion...
    https://discussions.apple.com/message/18783684#18783684

  • My imac turns on with start up sound then nothing else just the timer going round

    my imac turns on with start up sound then nothing else just the timer going round

    Try restarting holding down the SHIFT key. That will do a directory check in Safe mode. It will take longer to start so continue to be patient.
    If it starts in Safe mode, then restart normally and see how that goes.

  • The camera on my iphone4 opens up but seconds after the screen turns black with white line.

    Hi guys! Please help me I have iPhone 4 .the camera although opens up when I press the button, but seconds after the screen turns black with white line. Need I need it repaired or there is some trick which can set it right.?

  • When I click install flash I get a blank window with this comment at the top 1 item Zero kb available and flash will not install This is my first time on this forum what do I do next please

    When I click install flash I get a blank window with this comment at the top 1 item Zero kb available and flash will not install 

    https://forums.adobe.com/thread/1195540

  • Backlight failing imac turns black

    My screen turns black, randomly... and sometimes within 10 second of turning it back on.
    Genius bar, and all other generic analysis have shown 'no hardware problems'
    Since it looked like a software thing, I went all the way.
    I erased my iMac, and started from scratch... re-installed Mountain Lion.
    but yo!
    It happened again!!
    My screen blacked out..  hasn't done it repeadedly -yet though.
    When the screen blacks out, the cpu and hard drives keeps going.. it's not going to sleep.
    It's just the backlight (or whatever is controlling) it is failing... over and over.
    Haven't found an answer yet...
    Thanks for your help
    -Stian

    Yep, we have 2 from work that are the same
    We took them to apple and then the next day they said they couldnt fail them.. the tings fail constantly and on any mac pro.. thyey must not of even looked at them,
    They lost the sale of 2 monitors as they didnt test them so why would I spend any money with them on new ones..
    This is the trouble with companies making a lot.. they forget about how hard the journey was to get there..
    I have contacted Nextbyte 2 times as I have a mac with a dodgy seagate and I stated that I wanted to lodge my Mac, 2. If they could ghost my currently drive I would be happy to pay for it
    Nothing, they have not responded..
    let me know if you find a solution as the 2 monotors are perfect otherwise..
    Thanks

  • My iPhone screen turned black with blue stripes then went to the logo screen and then turned black. (iPhone 5) help!

    My lock button has not been working for a few months. I dropped it a couple of days ago but it barely did it a while ago. I was texting when the screen developed blue/purple lines with a black background and then it went to the apple logo. So I thought it would just restart but then it turned black and won't respond to me trying to work it blindly (guessing where the icons are)... Should I just let it die and hope for the best? Any advice? Help.

    Most likely a damaged LCD display. Probably will not fall under warranty . Apple can do an out of warranty repair for 199 on a 4S. You could look into insurance options as well through your carrier.

  • When I tried to turn off my ipad the screen is black with a spinning symbol in the center and won't turn back on either.

    I cannot turn my ipad on or off it just keeps spinning.

    Try a reset. Hold the Sleep and Home button down (together) for about 10 seconds until you see the Apple logo. Ignore the red slider.

  • No Apple boot screen on new iMac - Just black with white writing on boot

    Hi All,
    I have just purchased a new 3.06Ghz iMac and whenever I turn it on, or shut down, I do not get the Apple boot screen, I just get a black screen with a long list of white writing on it. This appears for about 5 seconds and then the usual desktop loads.
    Is there a way that I can get the usual apple boot screen to return? I have not done anything to the machine as it is brand new out of the box and it has been doing this since first boot.
    Any help would be greatly appreciated.
    Luca

    It was just a simple case of removing the verbose boot settings which I found a script for after searching on Google.

  • My scrollbar on the right side turned black, with the update, and I can no longer see the position marker to grab it and move up and down

    This didn't happen until Firefox 11.0. The scroll bar is there, with the up and down arrows, but everything in-between is black, and you can no longer see the mini-bar within to move the page.

    Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).
    *Don't make any changes on the Safe mode start window.
    *https://support.mozilla.org/kb/Safe+Mode
    *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Maybe you are looking for

  • How set up  macbook  pro Internet router?

    how set up  macbook  pro Internet router?

  • Nokia Bluetooth headphones: lost code

    I have a nokia HS-3W BT headphones and i cannot find the BT code to connect it to my phone. What shall i do? Thanks mg

  • Complex validation rules

    Experts, I want to do validation check for this screen http://www.2shared.com/photo/hRS0k6yI/validation_check.html. The use case is : Basically if one of the checkbox is selected, the user need to select the radio button under it or enter some value

  • TM LaCie XHD fails again

    Have 500GB LaCie d2 HD QUADRA from 2007 as my TM backup XHD. 3-2009 failure to mount & had to replace Power supply under warranty. Now same problem.  I read online many people have problems with LaCie power supply failing repeatedly. Thinking of gett

  • Hard reset for palm tx

    hello  im very new at this ,i just got a palm tx and it is used  can i do a hard reset to put it back to factory specs and if i can how do i do this . if anyone can help me with this please reply thanks Post relates to: Palm TX