My 2011 iMac will not power up.

Tried SMC and PRAM. Even tried using different power cord.

Step #6, as per > Troubleshooting: My computer won't turn on

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  • My 2011 IMac will not boot up past the White apple logo screen with the whirly circle

    My 2011 IMac will not boot up past the White apple logo screen with the whirly circle. I have tried various commands but to no avail. does anybody have any advice?

    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 startup failure is to secure the 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 the last backup, you can skip this step.
    There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
    a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
    b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
    c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start 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.
    d. 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.
    Step 2
    If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
    Step 3
    Sometimes a startup failure can be resolved by resetting the NVRAM.
    Step 4
    If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
    Step 5
    If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
    Step 6
    Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
    Step 7
    If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
    Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Post for further instructions.
    Safe mode is much slower to start 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 the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
    When you start up 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, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
    If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
    If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
    Step 8
    Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
    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 restart as usual.
    Step 9
    If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.   
    Step 10
    Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
    Step 11
    Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
    Step 12
    This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
    Step 13
    If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

  • My brand new iMac will not power up after an update restart, any suggestions?

    Any suggestions on why my IMac will not power up after it done a restart?

    Try an SMC reset and PRAM reset: https://discussions.apple.com/docs/DOC-3603
    If that doesn't help:
    See if it will start in Safe Boot: restart holding down the Shift key until you see a grey progress bar, type your admin password when prompted, let it continue to (hopefully) boot. Restart as normal from the Apple menu.
    If that didn't help, try booting into the Recovery HD: restart holding down Command+r and choose Disk Utility from the four choices when they appear on screen. Once DU has launched select your Macintosh HD on the left and click on 'repair disk'. If anything gets changed click on repair disk again until you get a clear pass, restart as normal from the Apple menu.
    If you still have problems, give AppleCare a call.

  • HT1750 I tried to change the memory and now my Imac will not power on. and there are no beeps. what did I do wrong?

    I tried to change the memory and now my Imac will not power on. and there are no beeps. what did I do wrong?

    Don't know.  Could be any number of reasons.  Re-read the how to install RAM manual again for your model iMac.  Double & triple check to make sure you purchased the right RAM chips.   Make sure they are seated properly.  If you didn't hear a snap when seated, the RAM is not properly seated. 

  • TS1587 My iMac will not power on .

    My iMac will not power on

    Hi I have some weird problem related to this and unfortunately either or apple or APS able to solve.
    I have picked a 27 iMac late 2012 model 2 montsh back and a APC Back up UPS 700.
    Whenevr I turn on the Main power> Turn on APC> Turn on iMac, the iMac doesn't turn on. I will have to unplug it and plug it back it works. It happens only when I start the UPS for the first time in the day. After that how many ever times I remove my iMac plug and plug it back to APC, it turns on.
    Initially I thought, it is the problem with the UPS and contacted APC where they replaced with a new UPS and its the same problem.
    Unfortunately, Apple is not able to tell that its the problem with the Apple iMac as it works fine when directly powered without using APC.
    So, the problem lies working with APC and iMac together.
    Could someone please help. The last option I have is to carry the UPS to a Apple store and see if it works fine with any other iMac.
    Also to mention, I did try SMC reset adn PRAM reset.

  • My iMac will not power up

    My iMac will not power up. It is a late 2008 21.5 inch. Any suggestions, tricks, soothsaying, or voodoo that one can apply here would be a great help. Thanks.

    If it doesn't have any video and doesn't make any sounds take your 20" (not 21.5") 2008 iMac in for repair, it has suffered a hardware failure. When you say it will not power up please be more descriptive, what exactly happens when you hit the power button and what troubleshooting have you tried?

  • IMAC will not power up

    I just purchased an iMAC, unpacked it, set it up, plugged it in and it will not power up

    If it is new, contact Apple immediately.

  • IMac will not power back on. Any ideas?

    I was installing maverick and suddenly my iMac shut down and will not power back on. Any ideas?

    Which model iMac do you have?  If still under warranty or you have AC, call them & let them deal w/it.
    Out of warranty:  Please detail ALL you have done so far in the way of troubleshooting?   Need this info to avoid the been there done that scenarios.

  • IMac will not power up!  Help!

    I have an iMac that for some reason will not power up, at all.
    The specs are: 800 MHz, iMac G4, 512 MB.
    It stopped detecting the available WiFi network in my home regardless of where I located it. So I rest PRAM, and no change. I reset NVRAM and all in open firmware, no change. Pulled the RAM and AirPort card and reseated; no change.
    So I reset the PMU (pushed it quickly and only once) and now it will not start up at all. No fan. No lights. Nothing.
    I don't have any extra plugged into the iMac now. I pulled the RAM and Airport card and have tried booting with and without just the keyboard plugged in.
    I've unplugged it and let it set for over 24 hours and still nothing. I have noticed that when I plug it in, the overhead incandescent bench light on the same circuit dims or flickers ever so slightly for a very brief moment.
    So I'm leaning towards one of the following:
    1. PMU crash meaning I need to replace the logic board
    2. Fried logic board which is likely why the Airport card stopped responding (which, by the way, was somewhat intermitant at first)
    3. PMU crash that can somehow miraculously be reset saving me from having to get a replacement logic board
    4. Bad battery (haven't checked this yet as it seems the machine would show some sign of life if it had a bad battery. This thing is lifeless).

    Hello slee:
    You have, IMHO, analyzed the problem. I think it is time to take the computer to either an Apple store or to an Apple certified repair shop for diagnosis. I do not think you want to begin replacing things that may be OK.
    Barry

  • My imac will not power on

    I just bought my iMac. I used it in the store to set things up and now that I have it at home it will not power on! Super Frustrated!!

    Hi 3olivia,
    Thanks for using Apple Support Communities.  This article has steps to take if your computer will not turn on:
    Troubleshooting: My computer won't turn on
    http://support.apple.com/kb/TS1367
    Cheers,
    - Ari

  • Intel iMac will not power on

    I left my computer along for about an hour of using it all day, went back to it and it was shut off. I have not installed and software recently, other than the last OS X Lion update. That was on Tuesday, today is Thursday.
    I have attempted to reset the SMC but that did not solve the issue.
    http://support.apple.com/kb/TS1587
    I also took the next suggested step of removing the SODIMM ram and reinstalling it and that also did not solve the issue.
    My iMac is an Intel based model, 20" / 2x2Gb DDR2 667 MHz / 500GB hard drive / And I have the latest Mac OS X Lion installed.
    Other than taking it in for service do you have any suggestions?
    Thanks,
    Robert

    Just solved this problem by resetting the PRAM (parameter ram) as listed in the instruction manual. Press the following keys while pressing the POWER button (You might need a second pair of hands for this stunt):
    CMD + OPTION (ALT) + P + R
    Hearing the startup sound will be followed by the sound of the weight falling off your mind.
    I want to add that the iMac this solution worked for is running Snow Leopard, but the hardware is the same.
    All the best,
    Patrick

  • Imac will not power up.  Is there a reset button somewhere?

    My imac lost power when Grandson was playing a game.  We have not been able to restart it.  Is there a reset button on it.  Thanks for any suggestions?

    check out this article:
    Intel-based iMac: What to do if your computer won't turn on
    http://support.apple.com/kb/ts1587

  • My mid 2011 imac will not let me use the efi update

    I cannot put win 8 on my imac mid 2011 with boot camp. Getting an error \boot\bcd\  and I also see an efi drive when i hold the alt option button down. I had win 7 on a partition with boot camp and it is now reformatted.

    Please try below solutions to see if any of these works.
    1.- Close Elements.
    - Launch the Photoshop Elements Welcome Screen and hold down ctrl + alt + shift as you click Editor.
    - Continue to hold the keys until you see a message box asking if you want to delete Photoshop Elements settings file; click Yes. Elements will open with default preferences.
    2: In case any network printer is attached try to launch without network or printer uninstall or make different printer as default.
    3: Try launching with anti-virus off or removing PSE from conflicting list.
    4:On the drive on which you have installed PSE,on my machine it is on C:
    Go  to C:\Program Files\Adobe\Photoshop Elements  10\Locales\<locale>\Plug-Ins\Import-Exportand you will find twain  plug-in. Remove that plug-in from that location and copy it somewhere  else.
    Now launch PSE and check if it works.

  • IMac will not power.

    Wag can I do to get my computer to power up?

    You posted in the PPC iMac group but show you have Mac OS X 10.8.4...so assuming the OS X is correct, did you power down and what have you done to power up?  Have y.ou tried holding the power button in for a few seconds, not just giving it a quick press?

  • Imac will not power on

    I switched my imac off for a week as I went on my holiday. Now it won't power on. Electroc cable is okay. Memory chip seems well sited. Nothing happens as I press the power button. Completly dead! Any ideas ???

    Marlene999 wrote:
    Thanks for prompt reply. The machine is "vintage" according to Apple ,It is about 5 years old. Where can I find PRAM battery to change it myself. I have some technical skills. The power cable is okay.
    From the Apple Store or AASP, this is not a user servicable part. Unless you are very technical and don't mind doing major surgery on the machine it's best left to the people I originally referred you to.

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