IMac suddenly turned off

Hi,
I was working on a word document and my iMac just suddenly turned off and cannot be turned back on.
I have tried SMC reset but no luck.  Can someone please help?
Thanks.

Try plugging into another outlet it may be the outlet you are using. Does it make any sound at all or have any video.
Finally complete your profile, you will not get help without giving us any clues. The profile is there for a reason,   your post is like says "my car is broken what is wrong?"

Similar Messages

  • Well-used iMac suddenly turning off

    My not-so-new 20" iMac is turning off on me. I have used this computer, many hours a day, for several years now. For the past 20 months, I've lived in an apartment with old outlets that haven't been replaced, and don't have great contact with the electrical plugs. I've been using a power strip, and the computer only turned off when someone knocked the plug out of the outlet or bumped "reset" on the power strip.
    Starting yesterday, my computer started turning itself off (apparent power failure) without anything getting bumped. I'm not seeing any changes in the lights around, me, either, so I don't think that power fluctuations are the proximate cause. I've fiddled with all of the pulgs, unplugged and replugged them, and the problem is getting worse: my computer is shutting off more often. I'm using my spouse's laptop to ask this question, because it's gotten to the point where my comptuer really isn't useable. I've gotten great advice from these forums before, and I'm looking forward to getting good advice this time.
    Could a power regulating power strip solve my problems? I'm guessing no, but should I do this in the future, to prevent damage to my computer? More importantly, what is likely wrong with my computer, and about how much would it cost for me to replace the part, or get it fixed at the Apple store? I did not purchase any extended warranties, so this computer is completely out of warranty.

    It's been a month since I first posted, and I've got more clues and details now. After I posted my question I realized that my computer is and has been on a surge protector (and the protector light is light), so on later reflection I don't think the problem is the steadines of the power.
    den.thed's suggestion seemed to work at first, although I think the longest my computer has gone without shutting down in the last month was about a week, and at this point resetting the SMC doesn't seem to be helping (not that I've turned the computer back on without unplugging it, so I haven't tested this precisely).
    I leave my computer on at night (sometimes I put it to sleep, sometimes it puts itself to sleep, but sometimes something happens and the computer doesn't put itself to sleep, or my cats step on the keyboard and wake it up), and it has not shut down at night. It only shuts down when I'm sitting in front of the computer, using it. This made me think I might be having a software problem, so I tried avoiding using specific programs, but I can't isolate a specific program that is always open or always being used when my computer shuts itself down. I think my computer has only shut down while I'm typing, but I'm not certain on that one. I'm using a logitech wireless keyboard (because I spilled water on and destroyed the original keyboard), and (because I only have the one keyboard at the moment) I haven't tried using another keyboard.
    Last night I had the realization that the times my computer was going longer without shutting down was when I'd unplugged my backup HD running Time Machine (because of the limited number of USB connections on the computer).  I am not certain if my computer has ever shut itself down with the external HD attached. I have had successful saves to Time Machine on my external HD while dealing with this problem.
    But these two clues: maybe shutting down only when external HD is plugged in, and definitely only shutting down when when I'm sitting at the computer, actively using it, don't seem to me to point to the same problem.

  • IMac i7 - Suddenly Turns Off

    The iMac suddenly turns off while I'm working. I've owned the unit since August 2010 but this problem has just started occurring. I think it has happened three times in the past two week.
    I've heard about this problem, but have not experienced it until the past couple of weeks. I do have Crucial RAM installed. Before I go to too much trouble, or take it into Apple, I thought I'd check the forums to see if anyone has nailed the problem or come up with a solution.
    I there is an easy solution I would be most grateful.
    Thanks if you can help.
    Linda
    Message was edited by: Linda - PBCS

    I think your random shutdowns are caused by RAM incompatibility. This problem has been widely reported in this Discussion, and if you do a search by keywords “random shutdown” or “sudden shutdown” or “turn off,” you’ll find dozen threads on this subject.
    1) First, did you add RAMs to your iMac? If you have 16GB installed, go down to 12GB i.e. pull out the 8GB you added and reinstall the 4GB that originally came with the iMac. If you need 16GB, purchase 16GB of Samsung brand RAM.
    2) Although the shutdowns are generally associated with people who upgrade to 16GB, it does happen with 8, 4, or 12GB and with factory-installed RAMs. If this is your case, pull out the RAM from the slots, and see which RAMs you’ve got. The factory-installed RAMs in the iMac can be made by Samsung, Hynix, or Micron Technology. Whatever RAMs you get, change with Samsung RAM you purchased from a reputable seller.
    3) The RAM fix is very easy, fast, and works instantly. My advice as a fellow Mac user is to do the RAM fix BEFORE you call Apple, because apparently Apple does not acknowledge this problem and will do everything for you (change power supply unit, mother board, and eventually the entire computer) but not the RAM switch, without solving the problem.

  • IMac 2008 emc 2211 suddenly turns off and back on, RAM problem?

    I have an iMac from 2008 emc 2211.
    Two years ago i upgraded my RAM from 2GB to 4GB Crucial memories.
    Two weeks ago my imac started to suddenly turn off and back on inmediatly. Recently it stared to happen more often to the point that it can't boot completely and show the desktop
    I checked the power source and it was fine.
    I opened the computer and pulled out the power supply and it seamed to be fine.
    I tried to run the hardware test with the disk that came with the computer and it can't even finish the test because it turns off.
    Before it couldn't boot anymore i checked if it was overheathing with smcFanControl and the temperature was always around 44C, so it was fine.
    Could this be the crucial RAM that is failing?
    thanks in advance.

    Ok, i've replaced the RAM and the power supply and the problem persist, so it seams to be the logic board that is failing.
    Any ideas?

  • IMac G5 suddenly turned off!

    Hi,
    My iMac G5 suddenly turned off and looked like the power cable disconnected. But I am sure outside of the iMac, the power is no problem.
    After this, I tried to power on my iMac G5 with the power button, iMac got a loudly beep sound with the light flashing. Although it can startup to the login window, but when I login to system, again, the iMac was dead with the same situation.
    Then power on again, same sistuation was still there (loudly beep sound with the light keeping flashing. Now, after login, the system seemed to be good till now (2hours).
    Anyone can help me to figure out the porblem? Is it possible that iMac got the high temperature (because here my room is a little bit hot)
    Thanks!

    Welcome to Discussions - which model do you have (how to identify your iMac)? It may be that your power supply unit is failing, see if you qualify for either of these Rev A and Rev B repair extension. You might also try cleaning the air vents and vacuuming the inside of your machine (don't open it if it's an iSight). Some people train a fan on the rear of their iMacs if their rooms are very hot, it helps keep the computer cool.
    Miriam

  • My Apple iMac MB418LL/A 24-Inch Desktop suddenly turned off

    My iMac MB418LL/A 24-Inch Desktop suddenly turned off and now doesn't respond to the power button even after the SMH (right acronym?) reset procedure.

    Please do not startup duplicate topics.
    I replied to you here >  https://discussions.apple.com/message/18090261#18090261

  • My Imac will suddenly turn off without warning and then take several hours before it will switch back on again

    My Imac will suddenly turn off without warning and then take several hours before it will switch back on again. Can anyone advise?

    I like that third tag...
    There's really no telling what the problem might be - you may want to try running the Apple Hardware Test (if you can) to see if you've a hardware issue. If you can't even get to the AHT, you've no option but to take the machine into your local Apple Store or an AASP and have them run diagnostics on the machine.
    Sorry,
    Clinton

  • Macbook Pro suddenly turned off, not charging either.

    My Macbook Pro suddenly turned off last night. I've tried all the troubleshoots listed in the user manual. Thought it was just batt low but it would not even charge, neither the battery sign located on the left side wouldn't show any sign/blink/color. Please help me, it's just 8-month old and Im not sure what could be the reason of this problem. PLEASE AND THANK YOU

    MonicaDCC wrote:
    Hi i'm sorry but what is  SMC?
    System Management Controller
    The System Management Controller (SMC) is responsible for many  low-level functions on Intel-based Macs.  These functions include:
    Responding to presses of the power button
    Responding to display lid opening and closing on portable Macs
    Battery management
    Thermal management
    The SMS (Sudden Motion Sensor)
    Ambient light sensing
    Keyboard backlighting
    Status Indicator Light (SIL) management
    Battery status indicator lights
    Selecting an external (instead of internal) video source for  some iMac displays
    You didn't click the link to Apple's instructions and explanation, why?
    Here it is again, click, read, follow the links for your machine and the instructions how to perform or take your machine in for service.
    https://support.apple.com/kb/HT3964

  • MacBook suddenly turns off at 40% of battery charge and trackpad doesn't work

    Hello,
    I had to replace the battery of my white MacBook (13 inches, mid 2010), because it was swollen, and the capacity was about just 20-30% of its original one. I bought a new one. Specifically, this one. After replacing it, I have those problems:
    When I run on battery, the computer suddenly turns off at about 40% of the charge. No warnings. Just turns off.
    The trackpad is not working properly. I can move the mouse, but I can not click. The swollen battery was pusing the trackpad, and I guess it's broken now. I don't know if I can replace it.
    Coconut battery tells that the maximum charge of the battery is below the design capacity. Not sure if this is a problem, or Coconut battery is just comparing my battery's numbers with the theoretical numbers of a brand new battery. Check a screenshot
    The battery drains too fast. From 100% to 65% in about 20 mins. So, at the end, I have less than 1 hour of battery time.
    I've tried resetting the SMC, following these instructions. Specifically, pressing (left side)Shift-Control-Option keys and the power button at the same time, releasing all the keys and then pressing power button to turn on the computer. Not worked. I think it was even worse.
    Could it be a problem of this specific battery? Or maybe just the MacBook doesn't accept batteries like that one? It's not original.
    In the first case, I would return the battery to get my money back. In the second case, I guess I should have bought an original one.
    Additional data that may be useful:
    Mac OS X 10.8.5 (12F4S)
    EFI boot ROM version: MB71.0039.B0E
    SMC version: 1.60f6
    About EFI boot and SMC versions, those are the last available official updates, obtained from here.
    Many thanks in advance.

    I'd say it was a faulty battery.

  • My iphone 3gs suddenly turned off and does not want to turn back on.

    My iphone 3gs all of sudden turned off and does not want to turn back on.

    Charge it with a wall charger for 15 minutes, then hold the HOME and SLEEP buttons until an Apple logo appears, about 10 seconds.

  • I have an ipod touch 4g it was just Fine and today i tried to plug it to my laptop to sync music and it suddenly turned off and it didn't work for 15 mins and then it worked but i can no longer sync apps or music plz help me as soon as you can

    I have an ipod touch 4g it was just Fine and today i tried to plug it to my laptop to sync music and it suddenly turned off and it didn't work for 15 mins and then it worked but i can no longer sync apps or music plz help me as soon as you can

    If you have not taken the iPod apart, Apple will exchange it for a refurbished one for $99. You can do it an an Apple store
    - Make an appointment at the Genius Bar of an Apple store.
      Apple Retail Store - Genius Bar
    Or sent it to Apple

  • Im using iphone4. It suddenly turns off if not plugged in. It will only turn on once its plug in again.As pr tech, if its battery prob, then it would nt turn on completely. What do u think is the prob ?

    Im using iphone4. It suddenly turns off if not plugged in. It will only turn on once its plug in again.As per tech, if its battery prob, then it would not turn on completely. What do u think is the prob ?

    cutieliz wrote:
    What do u think is the prob ?
    The battery

  • My imac G5 turns off on mi then dont want to turn back on at all but after one day turns on mormaly then turns back off again

    my imac G5 turns off on mi and dont want to turn back on at all but nex day tuns on normaly then tuns back off again

    It could be several possible issues.
    1)  Your G5 iMac could be overheating.  Depending on which model, you might be able to open the back by yourself (not on an iSight model), and using a can of compressed air, youcould blow the dust out of it.
    2)  The power supply could be going bad.
    3)  The hard drive could be going bad.
    There could be several others.
    If you have the original, came with the iMac when purchased new Install Disks, you can try running the Apple Hardware Test to see if it can determine any hardware issues.  It can't always find the problem.
    Good luck.

  • Macbook pro 2013 suddenly turn off and wheh charged its define only grren light and dont turn on.

    Hi Friends..
    I have mac book pro 2013. Today when I started its got suddenly turn off and also not turn on. The mac does not charged also not turn on. charger define only green light. I reset SMC but its not work.
    Please If any one have Idea.

    Hi Dipang,
    If your MacBook Pro will not turn on, you may want to follow the steps in this article to try to get it up and running again -
    OS X Mavericks: If your computer won’t turn on
    http://support.apple.com/kb/PH13978
    Thanks for using Apple Support Communities.
    Best,
    Brett L

  • Does anyone know why the fan on my imac wont turn off?

    does anyone know why the fan on my imac wont turn off?

    Peter.L.
    Try resetting the SMC, it may take 2-3 attempts. Please post back with the results. If you're not sure how please follow the instructions in Intel iMac SMC and PRAM resets

Maybe you are looking for