Imac tries boot and turns off

When I turn on my iMac, a white screen with an Apple logo appears with a rotating circle right below the logo. After a while, it fails to boot and turns off. I tried turning the computer on while pressing Command R or Shift Command R P but nothing seems to work. Pressing those buttons while turning on just makes the computer turn off sooner. Does anyone have any suggestion?

Hello DESOMBRE,
It seems you cannot successfully boot up your Mac or enter recovery mode. Based on the information you have provided, it appears your iMac needs to be serviced. The following link should help you get started with the process and has links with additional information on topics such as warranty and service pricing, battery replacement, and express replacement service.
Apple - Support - Service Answer Center
Thank you for contributing to Apple Support Communities.
Cheers,
Bobby_D

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Imac keeps restarting and turning off on it's own.

Just recently my iMac 21.5" 2010 (10.7.4) has been restating and turning off unexpectedly on it own. I've had this Mac for over a year and have never had this problem before and haven't even changed any settings or done anything to it.
The biggest thing I've done to it was update it's software.

Hello, have you blown the dust ou tlatey?
If it's cooled foran hour or so dies it Boot?
Do you have the extended 3 year AppleCare?
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.
If 10.7.0 or later...
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partitiion & use Disk Utility from there.

System boots and turns off in seconds

My system is hp dv7 4010tx it was working perfectly and suddenly it turned off and now just power on all lights up and fan run just for seconds and turns off I have done the hard reset still nothing can u guys plz help me ?

Hi pvharis,
Thank you for joining the HP Forums! It will be hard to determine the exact cause of the problem if it doesn't stay on. At the moment it just turns for a few seconds and then dies away. There could be a problem with the battery or the power cord possible not charging properly. Do you have another power cord that you could try? Do you ever see the Num or Caps Lock keys flashing? If so how many times does it flash?
Thank you,
Please click “Accept as Solution ” if you feel my post solved your issue.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Thank you,
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I work on behalf of HP

There are songs that are on my phone that aren't in my iTunes. How do I delete them? I've tried synching and turning off ITunes match.

I have a bunch of songs on my phone that aren't on my ITunes. How do I delete them?

Try deleting all music from your phone by going to Settings>General>Usage>Music, swiping across All Music, then tapping Delete. (After doing this, you'll have to redownload your music again from iTunes Match.)

My imac will not load after I enter my password. The only thing I get is the arrow from my mouse on top of a blank white screen. Can anyone tell me what this is? I've restarted and turned off several times. I left it on in this state for 8 hours and

My imac will not load after I enter my password. The only thing I get is the arrow from my mouse on top of a blank white screen. Can anyone tell me what this is? I've restarted and turned off several times. I left it on in this state for 8 hours hoping it would reload and work. No luck.

Hello KCC4ME,
You may try booting your Mac in Safe Boot, as it can resolve many issues that may prevent a successful login.
OS X: What is Safe Boot, Safe Mode?
http://support.apple.com/kb/HT1564
If a Safe Boot allows you to successfully log in, you may have issues with one or more login itmes (while the following article is labelled as a Mavericks article, it is viable for earlier versions of the Mac OS, as well).
OS X Mavericks: If you think you have incompatible login items
http://support.apple.com/kb/PH14201
Cheers,
Allen

TS1398 My Ipad was working but I now can't access the internet. I have tried resetting and turning Wifi on and off. It is just showing as buffering all the time? Please help

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Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
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Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
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http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
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iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
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https://discussions.apple.com/thread/4010130
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~~~~~~~~~~~~~~~
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This my sound too simple, but I just kept clikning on the arrow next to the selected music and it finally "Kicked" in.
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My new iPod touch won't let me view my pictures. It lets me open the app but then crashes when I try to open an album. I've tried resetting and turning it off for a while but nothing has worked. What can I do?

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When trying to use App Store I get a message "could not sign in an unknown error has occurred." I reset our connection and turned off iPad. Any suggestions?

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http://support.apple.com/kb/PH14243
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http://support.apple.com/kb/PH14185
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Are you using security software on your PC? If yes, try to disable the software or check the settings. More info here: http://support.apple.com/kb/TS3125

I'm trying to use a madcatz controller on the mac but it turns on for 2 seconds and turns off. the system profiler picks it up as a xbox 360 gamepad but says its not been configured. how can i allow my self use this with my games.

i'm trying to use a madcatz controller on the mac but it turns on for 2 seconds and turns off. the system profiler picks it up as a xbox 360 gamepad but says its not been configured. how can i allow my self use this with my games!

I have exactly the same problem.
I'm a little peed-off with Microsoft on this. The original wireless controller I have doesn't work either since the cable I'm using is 'just' the charge and play cable, so a direct connection to my Mac won't work with this cable. It's a cable for god's sake. Why on EARTH put any limitations on this!?!?
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Message was edited by: nostrawaggus

I am getting a message in the middle of my imac screen instructing me to hold down the on-off button and turn off the machine. The message is in several foreign languages beside english, and there is not way to get rid of it. The curser is inactive.

I am getting a message in the middle of my imac screen instructing me to hold down the on-off button and turn off the computer. The message is in several languages and completely takes over the computer disabling the mouse and all other functions. The only option is to unplug the computer or turn it off. I'm concerned that this is a virus. It does not look like it's related to Apple or the imac OS.

That sounds like a kernel panic. These are generally hardware related, often caused by poorly seated or fauly RAM.
What is a Kernel Panic?
http://support.apple.com/kb/TS3742
and http://support.apple.com/kb/TS1892?viewlocale=en_US
http://developer.apple.com/mac/library/technotes/tn2002/tn2063.html
More details here:
http://www.thexlab.com/faqs/kernelpanics.html
Useful articles on how to avoid and eliminate kernel panics here:
http://reviews.cnet.com/8301-13727_7-10344626-263.html?tag=mfiredir
http://www.macworld.com/article/2027201/how-to-troubleshoot-a-kernel-panic.html# tk.nl_mwhelp

My iphone 4s was updating to like 7.1 or 7.2 and i tried to updating by the iphone but it froze and turned off. and when i tried turning it back on the phone kept going to a screen that said plug it in to your computer i did but it froze at the scree

my iphone 4s was updating to like 7.1 or 7.2 and i tried to updating by the iphone but it froze and turned off. and when i tried turning it back on the phone kept going to a screen that said plug it in to your computer i did but it froze at the screen where it says plug it into iTunes. ive tried plugging it in to the computer but the phone turns itself off in the process. my old phone broke so I need to use the 4s

Hi sgray2832,
If you are having an issue with your iPhone becoming unresponsive or turning off unexpectedly, I would suggest that you troubleshoot using the steps in this article -
iOS: Not responding or does not turn on - Apple Support
Thanks for using Apple Support Communities.
Best,
Brett L

My iphone 4 suddenly turned off and will not turn on. It is not jailbroken and had a full battery. I have tried charging and turning it on but neither will work. What do I do?

My iphone 4 suddenly turned off and will not turn on. It is not jailbroken and had a full battery. I have tried charging and turning it on but neither will work. What do I do?

sadly most likely u have to buy a new battery unless u didint update ur ios cause people on ios 4 are having problems like that

Imac tries boot and turns off

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