Won't boot after power loss

I've got the MSI Neo-FIS2R and have been living through all the various Bios issues with the rest of you.
One trick my motherboard has since day one, is when I pull the power plug. If I move the 'puter to another location, or just pull the power plug to open the case. When I put the power plug back in, the 'puter won't boot. I have to clear CMOS, and only then it'll boot. This has happened on every Bios from 1.1 to 1.5.
Any ideas?
3.0C CPU, 2 x Cosair CMX256A-3500C2

Hi DVDGuy99,
I've not came across any like yours, but I'll suggest that you shut down your computer completely, wait for 1 min, switched off AC power from the wall socket, wait for 2~3 mins, then unplugged.
All the Best... :D!!!

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Mac won't boot after power chord became unplugged accidently.

Mac won't boot after power chord became unplugged accidently.
I have a Mac Mini running very latest version of OSX. I was making a recording with QuickTime; when I needed to plug in a USB recording device into the back of the Mac Mini, as I pulled the Mac off my shelf to do this, the power cable came out and the Mac lost power.
I plugged it back in and powered up the Mac. I get the grey screen with Apple logo and the spinning grey wheel; then it goes to a blue screen (as usual) and I get the "starting OSX..." progress bar. When the progress bar finishes, I'm left with a blue screen only, no dock, no apple icon at top left, nothing across the top, no nothing.
So far, I've booted from the original disc and repaired the permissions as well as the disc, then re-booted, but same old blue screen.
I have another iMac G5 machine, so is there any way I can at least retrieve the important HD files from the Mac Mini to my G5, before throwing the broken Mac Mini away?
Can anyone advise please?

Hi, Nigel.
Not to differ with my colleagues here, but there's an important question that wasn't asked.
1. You wrote: "So far, I've booted from the original disc and repaired the permissions as well as the disc, then re-booted, but same old blue screen."Did Disk Utility report any errors it could not fix when you ran Repair Disk? I suggest you run the procedure specified in my "Resolving Disk, Permission, and Cache Corruption" FAQ. Perform the steps therein in the order specified.
2. You may also want to run the Apple Hardware Test that came with your Mini to be sure nothing shorted when the power cable was removed from the computer. I've seen it happen, hence I usually recommend removing the power cable at the wall before disconnecting the power cable from the computer. See my "Apple Hardware Test" FAQ.
3. Repair Disk gives your Mini a clean bill of health, the blue screen may be the result of some Startup or Login item that was corrupted due to the sudden power outage. My "Troubleshooting Startup and Login Items" FAQ can help you pin that down if such an item is causing the problem and may help you avoid and Archive and Install.
4. If you elect to go the Archive and Install route, see my "General advice on performing an Archive and Install" FAQ for some important tips on this process.
5. As FYI, this is the kind of problem that makes one glad they've implemented a comprehensive backup and recovery solution. For advice on the backup and recovery solution I employ, see my "Backup and Recovery" FAQ. Computing without a comprehensive backup and recovery solution is like driving without auto insurance.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

IMac won't boot after power outage

I got a power outage a couple of hours ago. And now my iMac won't boot. When I power it up, it gets pass the white screen with the apple logo. The screen than turns blue with a spinning cursor. The cursor spins for about 10-15 minutes and stops but the normal login screen never appear and it won't boot into the desktop either. I just got a blue screen.
I have boot into the install Disc1 and did the disk repair and premission repair but it didn't help.
Any idea?
Sidney

Oh man, what a disaster!
I tried to do an Archive and Install but the installation hanged at the end of disc 2 after running an iWeb script (according to the install log) with about one minute left. I have waited for two hours but it just hanged there with all the drives spin down.
To make the problem worse. There was no way to quit the install at that point because all the menu items were disabled. The only way out was to power off. But when I powered it back on, it booted right into install directly asking for the disc 2. If I put the disc in it will install again and hang at the same spot.
Disc 2 contains iLife. I know Apple wanted to make things simple but why can't they give me an option to skip it? After all, iLife was already installed.
I finally got it working by booting from disc 1 and did a clean install. It took me all night to re-download all the updates and reinstall many applications. Fortunately, I have my address book, calendar, and most of my works backed up to .Mac so it wasn't a total lost.
On the bright side. Now my iMac is working better than before. I used to have problem getting auto sleep to work but now it works perfectly. Safari also had problem accessing charts (but Camino was fine) in a few web sites like schwab.com. Now everything works.
Lenn and David. Thanks for all your helps.
Now I am looking for a better backup solution so that the recovery won't be this painful if disaster strikes again. Any suggestions?
Sidney

IMac won't boot after power failure during 10.5.6 update

Help!
Tried to update last night and at something like 80% install, we had a power cut. iMac won't boot at all now - get to a grey screen which tells me to restart. Don't have a wired keyboard. If I did - what are the steps to get this working again.
I believe I have a good backup, but don't want to risk as all the family photos are on the iMac.
Thanks in advance.

Thanks for the help, but can't even get to a screen where I could type anything! I know I'm being dumb here.

PowerMac won't boot after power failure during install

Hi, sorry if this has been asked. I searched, but I'm not quite sure how to phrase it.
I bought a used PowerMac from craigslist and went to install a newer version of OSX. I had a power failure in the middle of the install and now the computer won't boot up. How do I go back to a fresh re-install and get the computer to boot up?
Much appreciated!

Did you use a retail install DVD? If you used a gray disc from another model Mac, that could be a problem.
Because of the power failure, suggest you reset the PMU. How long was the power Off? You may need to replace the PRAM battery.
Resetting Cuda/PMU on Power Mac G5, Power Mac G4, Power Macintosh G3
http://docs.info.apple.com/article.html?artnum=86760
 Cheers, Tom

Mac mini won't boot after accidental loss of power during firmware upgrade

i accidentally hit the power switch on the wall during an upgrade (might even have been a firmware upgrade, I didn't really look at what was going on). Anyway, now it hangs on the silver Apple logo screen with a spinny wheel on reboot. It's only 3 months old, it's the $599 model.
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I took it to the Mac store today and they fixed it for free by booting from an external drive and finishing the half-baked system update. Now that I know how to do that, I can fix it myself next time.
Thanks to Alan at the Salem, NH store!!

IMac won't boot after power failure?

My iMac wont boot or respond in any way after I experienced a brief power outage. Now it can't seem to switch on at all even after attempting the different resets I've read on other discussions. Please help with advice on any techniques to fix it otherwise steps I must take to get it repaired. Thanks.

Hello, not much you can do other than try this...
Intel-based Macs: Resetting the System Management Controller (SMC)...
http://support.apple.com/kb/HT3964

Mac mini won't boot after power outage

I have a Mac Mini Server which runs all the time in my house. We had a power outage a couple fo days ago but I didn't happen to check the mac mini until today. I found it at the login screen, and proceeded to log in. Everything was slow and taking way too long. Finally it froze. I restarted, but this time I got to a grey screen with a progress bar (no progress shown).
At this point one of two things happens - either it switches to a spinning wheel forever, or it just shuts itself off. I've restarted many times and it seems to randomly choose one of those outcomes. I tried resetting the SMC by unplugging, waiting, and then plugging it back in, but this had no effect. I want to reset the PRAM, but it doesn't seem to work, although that might be because my keyboard is not an Apple keyboard. I'm trying to get another ekyboard to try, but besides resetting the PRAM, does anyone have any suggestions?
Thanks.

Try booting to the OSX disk that came with the Mini
and run disk utility and try Repair Disk on the boot drive.
Also, if you have a bootable clone, try that.
If you have another Mac, another thing to try is
getting the Mini to start in Target Disk mode and connect
via Firewire to the other Mac and try a repair disk that way.

Mac mini won't boot after RAM upgrade.

Tried installing new RAM in my Mac Mini, 512MB stock to 2GB of Crucial. Followed the directions to a T, grounded myself the whole time.
Things I've tried so far:
1. Resetting the PRAM, no luck.
2. Holding option at start-up, shows no icon.
3. Holding shift, no luck.
4. Holding X, nothing.
How do I get it to accept a CD if it won't boot?

Welcome to Apple Discussions!
You clearly have a problem, but you don't describe exactly what that is other than that your mini won't boot after the upgrade. What happens when it starts up? Does it attempt to start and hang up on the grey or blue screens, or does it start beeping at you almost immediately after you try and start it up, and also flash the power light?
If the former, then you may have dislodged a connector while working inside the system, in which case opening it up and checking that everything is firmly connected would be the first thing to do. If the latter, then the beeping/light flashing is the system telling you it has failed the power-on self test and the pattern of beeps/lights indicates why. In your case likely the system can't find workable memory. In that instance, opening the system and ensuring that the RAM is firmly and fully seated would be a good step, and if the mini continues to fail, then replacing the new RAM with the original to test that the system will then start.
It is not likely that anything had damaged your MacOS install in the process of upgrading, thus normally no reason to need to boot to CD as a result of a RAM issue.

Mac Mini won't boot after update

I have a Mac Mini that won't boot after the most recent software update. Since the Mini has only a bluetooth keyboard and mouse, a number of the usual options (hold down shift, etc.) won't work. I've tried a reset, also no luck. At the moment, I can't locate my Tiger install CD either.
When holding the power button on during boot, I get a series of flashes from the status light on the front (a set of very rapid flashes, followed by a slower set, followed by a slow set) but no startup chime, or fan, or video. My display and power source are both known-good (work fine with my Powerbook)
Any suggestions, other than buying a hardwired keyboard/mouse?

Welcome to Apple Discussions!
The 'newer version of OS X" error occurs because the installer on the DVD you have booted to has by default been set to update the version of MacOS on the hard drive, which of course it can't do because the version of MacOS it is installing is newer. The only way to install in this situation is to select a different option. However, that isn't what you want to do at this point, because as it says, you'll loose your data if you do an 'erase and install'.
Instead, you should see menus at the top of the screen when it's booted to that install disk. Click the Utilities menu, select Disk Utility, and then click the top entry for the internal hard drive on the left. Once done, click on the 'Repair Disk' button (not Repair Permissions). This will test the drive to make sure it's OK. If it reports errors, and then reports 'error or exit' with the drive not repaired, you will either need a 3rd party application such as Alsoft's Disk Warrior, or to perform an erase and install (which of course you don't want to do at this point because your data is not backed up).
If the Repair Disk process completes with no errors, next select Repair Permissions, and let that process complete, then reboot the system as normal to see if you can now access the drive.

Mac OS won't boot after 2007-009 1.1 update

Hi all
Fairly major problem here. Mac OS X won't boot after the 2007-009 1.1 security update.
What I am left with is the mac boot screen, and not a lot happening. No rotating loading animation.
Any help would be really appreciated.
Thanks

I have been booting up for...2.45 hours now
Good grief!
Here are a few hints about what you should have done:
There are no guarantees, but following this procedure when installing updates and upgrades on your Mac will go a long way towards avoiding unpleasant after effects and ‘post-update stress disorder’.
It is also worth noting that it is an extreme rarity for updates to cause upsets to your system, but they may well reveal pre-existing ones, particularly those of which you may have been unaware. If you are actually aware of any glitches, make sure they are fixed before proceeding further.
So before you do anything else:
If you can, make a full backup first.
Turn off sleep mode for both screen and hard disk.
Disconnect all peripherals except your keyboard and mouse.
1. Repair Permissions (in Disk Utility)
2. Verify the state of your hard disk using Disk Utility. If any faults are reported, restart from your install disk (holding down the C key), go to Disk Utility, and repair your startup disk. Restart again to get back to your startup disk.
At least you can now be reasonably certain that your system does not contain any obvious faults that might cause an update/upgrade to fail.
3. Download the correct version of the COMBO update from the Apple download site. If your car runs on gasoline you would not want to fill the tank with diesel, so don’t try to install the PPC updater on an Intel Mac!
If you prefer to download updates via Software Update in the Apple menu (which would ensure that the correct version for your Mac was being downloaded), it is not recommended to allow SU to install major (or even minor) updates automatically. Set Software Update to just download the updater without immediately installing it. There is always the possibility that the combined download and install (which can be a lengthy process) might be interrupted by a power outage or your cat walking across the keyboard, and an interrupted install will almost certainly cause havoc. Once it is downloaded, you can install at a time that suits you. You should make a backup copy of the updater on a CD in case you ever need a reinstall.
Using the Combo updater ensures that all system files changed since the original 10.4.0 are included, and any that may have been missed out or subsequently damaged will be repaired. The Delta updater, although a temptingly smaller download, only takes you from the previous version to the new one, i.e. for example from 10.4.9 to 10.4.10. Software Update will generally download the Delta updater only. The preferable Combo updater needs to be downloaded from Apple's download site.
Now proceed as follows:
4. Close all applications.
5. Unplug all peripherals except your keyboard and mouse.
6. Install the update/upgrade. Do not under any circumstances interrupt this procedure. Do not do anything else on your computer while it is installing. Be patient.
7. When it ask for a restart to complete the installation, click restart. This can take longer than normal, there are probably thousands of files to overwrite and place in the correct location. Do nothing while this is going on.
8. Once your Mac is awake, repair permissions again, and you should be good to go!
If your Mac seems slightly sluggish or ‘different’, perform a second restart. It can’t hurt and is sometimes efficacious!
9. Open a few of your most used applications and check that all is OK. In this connection please remember that not all manufacturers of third party applications and plug-ins, add-ons, haxies etc, will have had time to do any necessary rewrites to their software to make them 10.4.10. compliant. Give them a weeks or two while you regularly check their websites for updates. This applies particularly to plug-ins for Safari 3.
N.B. Do not attempt to install two different updates at the same time as each may have different routines and requirements. Follow the above recommendations for each update in turn.
Lastly, Apple's own article on the subject of Software Update may also be useful reading:
http://docs.info.apple.com/article.html?artnum=106695
If you are updating Safari (or just have):
Input Managers from third parties can do as much harm as good. They use a security loophole to reach right into your applications' code and change that code as the application starts up. If you have installed 10.4.11 and Safari is crashing, the very first thing to do is clear out your InputManagers folders (both in your own Library and in the top-level /Library), log out and log back in, and try again.
So, disable all third party add-ons before updating Safari, as they may not have been updated yet for the new version. Add them back one by one. If something goes awry, remove it again and check on the software manufacturer's website for news of an update to match your version of Safari. Remember: Tiger up to 10.4.10 used Safari 2.0.4 or, if you downloaded it, Safari 3.0.3 beta. Safari 10.4.11 uses Safari 3.0.4 which is not a beta. If Safari 3.0.4 on 10.4.11 is not the fastest browser you have ever used, then something is wrong!
Moreover, trying to revert to Safari 2 when running 10.4.11 can have repercussions, as Safari 3.0.4 uses a completely different webkit on which other applications like iChat, Mail and Dashboard Widgets etc also rely.
Most errors reported here after an update are due to an unrepaired or undetected inherent fault in the system, and/or a third party ad-on. Two such add-on that have been frequently mentioned here for causing such problems are Piclens and Pithhelmet. If you have them, trash them.
Additional tips on software installation here:
http://docs.info.apple.com/article.html?artnum=106692

Macbook pro won't boot after installing update 10.9.3

macbook pro won't boot after installing update 10.9.3

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. 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. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login 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.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

MacBook Pro won't boot after trying to install 10.7.3 update. Start up stalls at Apple logo and spinning gear.

MacBook Pro won't boot after trying to install 10.7.3 update. Start up stalls at Apple logo and spinning gear. Computer won't even start in safe mode.

My daughter's MacBook Pro was doing exactly the same thing. I don't know if it had anything to do with the latest update. She called me about a week ago saying that her MacBook began running slower by the day . She then called me Friday and told me that it wouldn't get past the gray screen and the gear just kept on spinning. I did everything I could over the phone including Safe mode which it wouldn't go into and thought maybe it was the hard drive. She took it to the Apple store. Originally, they also thought it was the hard drive. It ended up being a corrupted operating system (Lion). Apple genius simply re-installed Lion and she's back up and running. Good thing she backed up right before it crapped out. She'll be restoring everything tonight. Don't know if re-installing Lion will help your situation, but it did the trick for my daughter.

[SOLVED] Arch won't boot after I created a separate /var parition

Arch won't boot after I created a separate /var parition on an existing installation.And let me confess: it was maybe stupid trying to do it on an existing install.
I edited the fstab correctly, copied the files using rsync preserving permissions. Then I kept a backup of /var using tar. Then went on to delete everything under /var, ie /var/*, the /var folder is still there. All this I did from a live CD. After that I booted into my arch linux. Here I get messages about systemd successfully finishing fsck on each of my partitions, then the screen starts blinking. And there is no more output. Pressing Ctrl+Alt+Delete causes systemd to stop its services and reboot.
Having realized I had borked my system, I removed the /var line from fstab and restored /var from the tar file I made earlier. Again I did this from a live cd. Rebooted into my arch system, and again similar issues, namely that after fsck and messages informing a few services had started, the screen keeps blinking.
The live cd I used for reorganizing my partitions was elementary OS freya. They have GParted in there. I also have an arch install iso lying aroung from May 2013. If necessary, I can download the latest version. I am currently typing from a Windows installation I dual boot from.
I don't know how to extract any boot logs as I am locked out of the system. Here is my fstab in any case:
# Filesystem information
# /dev/sda5 LABEL=fs_root
UUID=b9d739cf-fd8c-46dd-a919-bd827dc47c66 / ext4 rw,noatime,data=ordered 0 1
# /dev/sda9 LABEL=fs_var
UUID=ec0f7a49-dccd-43ab-8651-9aa3fdb41cc7 /var ext4 rw,noatime,data=ordered 0 2
# /dev/sda2 LABEL=fs_boot
UUID=0e8ab31a-3bda-4b85-a901-a36f21b1583d /boot ext2 rw,noatime 0 2
# /dev/sda6 LABEL=fs_home
UUID=d9e63c47-274e-447f-ad01-0d97afe0fd34 /home ext4 rw,noatime,data=ordered 0 2
# /dev/sda7 LABEL=fs_swap
UUID=7301227c-e9f3-41b8-9d0f-4cf3c159491c none swap defaults 0 0
# /dev/sda3 LABEL=fs_win
UUID=12B639D1B639B5D7 /fs_win ntfs uid=1000,gid=1000,dmask=027,fmask=137,showexec,nofail,noauto,x-systemd.automount 0 0
# /dev/sda3 LABEL=fs_share
UUID=D272269772268079 /fs_share ntfs uid=1000,gid=1000,dmask=027,fmask=137,showexec,noauto,nofail,x-systemd.automount 0 0
I would greatly appreciate any help.
Last edited by richcocoa (2015-05-03 18:04:44)

Have you moved everything from /var to /new_var (i named it for learning purpose)? You shoud copy content from /var but not on the fly but booting from arch iso cd, and than you shoud mount your / into arch-chroot environement, mount all of your mount points and than copy content from default /var to new /var. The copying should be done with this
cp -rax
and you can add -v switch to verbose output. I have my own /var moved the same way.
The simples way is:
-boot the arch iso cd
-mount all of your mount point (i created here in this step /new_var to move /var to a new place, and this /new_var i put in /etc/fstab as /var later)
-copy /var to /new_var with -rax or -vrax (recursive, archive, this filesystem or verbose, recursive, archive, this filesystem switches)
-umount all of it
-reboot.
Last edited by firekage (2015-05-02 07:49:20)

Mac won't boot after updating to OSX 10.6.4

I am on my 3rd Mac that won't boot after updating to OSX 10.6.4. One MacBook Pro and two iMacs. I fixed one but the last two are getting the better of me. HD is not fried. Have tried every keyboard shortcut on startup, Disk Warrior via. Target Disk, repairing permissions in single user mode. The machines will not boot off of a CD or DVD and it will not boot up in safe mode. Something in the startup files is preventing startup. I am suspecting Sophos antivirus. I tried to uninstall it and trash it but I think it's still blocking something. Any help would be appreciated.

Got it! Not sure if removing Sophos had anything to do with it but here's what I did.
1) boot dead machine in Target Disk Mode (iMac)
2) boot good machine off Snow Leopard disk (MacBook)
3) install OS to dead machine- I found this next part very curious. When the install was complete the MacBook restarted as the iMac.
4) ran software updates
5) shut down MacBook then shut down iMac
6) rebooted iMac- all was good
I actually did this twice because a co-worker had the exact same problem on her MacBook Pro. Got both fixed today.
Thanks everyone for your help!

Won't boot after power loss

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