How to fix the white screen of death

Hi I have been having trouble with my imac that was bought in 2009. I was working on a project when my imac froze. I turned it off and turned it back off but then it showed a screen the color of sky blue. I left it on the whole day then turned it off for the whole night. Once I turned it back on it showed a screen with a file sign and a blinking question mark.
Please help me

Sounds like a hardware problem, run Apple Hardware Test (Google it) in Extended Mode at least 2-3 times in succession. If you get any error codes you have confirmed its hardware which means there is nothing we can do to help on a user forum. It would mean a trip to your local Apple Store or AASP.

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    Hi ..
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  • How do you fix the white screen of death on ipod touch 4g

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    Apple Retail Store - Genius Bar       

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  • The white screen of death

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    Hello lhuston, 
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    Come follow your BlackBerry Technical Team on twitter! @BlackBerryHelp
    Be sure to click Kudos! for those who have helped you.Click Solution? for posts that have solved your issue(s)!

  • App getting the "white screen of death" since iOS 8.2 update

    Hello!
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    Hello melsuzhen, 
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    Come follow your BlackBerry Technical Team on twitter! @BlackBerryHelp
    Be sure to click Kudos! for those who have helped you.Click Solution? for posts that have solved your issue(s)!

  • HT1688 how do you repair white screen of death

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    I have no idea what that is.  Can you elaborate?  Also, can you please let us know the troubleshooting steps you've taken (such as the ones recommended in the user guide) so that we don't waste our time giving you solutions that you've already tried?

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  • I have a 13 inch MacBook Pro (2009) & the "White Screen of Death" is present.  Need help?

    I have a 13 inch MacBook Pro (2009).  Recently I bought an extended hard drive because I had used up the memory on my iDisk.  As I was running the Time Machine back up on my new extended drive, the battery on my Pro ran out causing it to shut down.  Once I hooked up my Pro to the power cord & logged in, the "White Screen of Death" appeared on the home display.  Obviously the battery still works, my phone is able to charge along with the extended drive, I am able to adjust the lighting on my keyboard along with adjusting the brightness on my screen, but the "White Screen" remains.  I need help in determining the cause of this issue & the steps I'll need to take in order to resolve this.  I love my Pro, all my documents, photos & music are on it & the last thing I want to do is kill my wallet by buying a new Pro.  So could someone on here please help me?  It would be greatly appreciated & I thank you in advance!

    Take each of these steps that you haven't already tried. Stop when the problem is resolved.
    Step 1
    The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.   
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    b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
    c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
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    If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
    Step 3
    Boot in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
    The login screen appears even if you usually log in 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.
    When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is damaged and the drive is probably malfunctioning. In that case, go to step 5.
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    If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
    Step 4
    Sometimes a boot failure can be resolved by resetting the NVRAM.
    Step 5
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    This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
    Step 6
    Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
    Step 7
    Repeat step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
    Step 8
    This step applies only to a Mac Pro tower, not to any other model. A dead logic-board battery can cause a gray screen at boot. Typically the boot failure will be preceded by loss of the startup disk and system clock settings. See the user manual for replacement instructions.
    Step 9
    If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested.

  • 2007 intel based iMac has the white screen of death with the mouse visible?? WHATSUP

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