Booting problem - computer shuts down during booting

I have run into a problem this morning after trying to download Yosemite. I have a Mid-2007 C2D iMac, that was running Mavericks very well this morning.
I tried to download the Yosemite update - but it kept getting an error message as it was trying to download. The computer became unresponsive, so I shut it down to try and reboot.
Now when I start my computer, I get a grey screen, with the Apple logo, then after a few seconds a spinning icon underneath, and then a few seconds under that a status bar. Once the status bar gets to about 25%, it goes away, and then the computer shuts itself down. Any ideas? Is it trying to install Yosemite, but can't find the files?
Any thoughts would be appreciated - thanks!

Hey bburkava,
Thanks for the question. I understand that you are experiencing issues with your iMac not loading up past the Apple Logo and spinning gear. The following resource may provide a solution:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/TS2570
Thanks,
Matt M.

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N200 shuts down during boot

Dear Lenovo,
I have a problem with my N200 laptop. Notebook shuts down during boot. Sometimes it is immediately after "Lenovo screen", sometimes it is when Vista logo appears. I found out that this is always when notebook is "cold". It does't matter if I want to switch on my notebook or if I want to restore it from hibernation or sleep mode. Next thing is that it always crashes when fan starts work at full tilt (I checked the fan but it is clear). When notebook starts correctly then it works without problems. Usually I have to switch it on about three times then it is OK. This problem takes about 2 weeks. I have my laptop about 7 month. Do you have any ideas how to solve this problem?
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Yes, problem with the video card sounds plausible! Any not so successful updates recently? It is sometimes to make a good uninstall, which is required to make a good install.
4in1 drivers should - esp. with W98 and ME - be installed while in SafeMode and with all autostarting programs disabled, for example Antivirus and utilities.
Else, since you have a damaged regedit, I would reinstall Windows. You might have done something for example an upgrade or new install the registry, not healthy, has made a note of. Some utilities also overwrite and change system files without good results.

HP Pavilion a1730n shuts down during boot

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Hi , Sounds like the power supply , when a load is put on the supply it does not seem to be able to cope with the correct output . You can buy a new supply ( same watt output or better )eg; if you have a 400watt supply get 400watt or higher supply as replacment . Checkurtech
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MacBook Air shuts down during boot

My Macbook Air (OS X Yosemite - Early 2014) automatically shuts down during boot, with the screen flashes during the loading bar at 40% and then shuts down. I've tried to reboot many times but it wouldn't get past the 40% on the loading bar.
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Also, the Recovery Mode isn't much help either. As do not have a backup of my HD, I'm not able to restore from Time Machine Backup.
So, I've tried to reinstall OS X Yosemite, but it says "Unavailable to install OS X". A website online says that you can resolve this issue by correcting the date through terminal, but the basic menu bar won't appear, in which I'm not able to access Terminal during the Recovery Mode.
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Invalid node structure
I'm pretty sure you need more then Disk Utility to repair the drive.
http://www.alsoft.com/diskwarrior/index.html
Assuming you have Snow Leopard installed, you can try reinstalling the Mac OS but you'll have to do this from another Mac.
http://support.apple.com/kb/HT3910
"Important: For MacBook Air, a MacBook Air SuperDrive, or MacBook Air Software Reinstall Drive is required to complete this procedure."

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Computer shuts down during startup

Hey everyone,
it shames me a little to ask for help about computers because I am usually ok with doing this stuff myself.
This time, however, I cannot seem to fix the problem indefinitely.I need a laptop for school and cannot afford another so any help would be greatly appreciated!:
I will just point the facts out:
After a few years use (two) it now shuts down during (windows) startup.
I ended up cleaning the Heatsink/fan yet the problem persisted.
The model is a Toshiba Satellite A200-PSAF6A.
I am no longer under warranty.
The school techs cannot help me.
A few oddities that I noticed:
It starts up fine when the power plug isn't plugged in.
It starts up fine with the power plugged in only in safe mode.
Using CCleaner and Defraggler temporarily fixed my problem (for about 5 minutes or so).
I hope that you guys can help me. It's just annoying that I cannot fix this myself..
If any further information is required please just ask and I will reply with as much haste as I can under my current circumstances.
Thanks,
Norak.

Linton wrote:
I have a couple of years old A200 satellite and have the same problem.
During a "cold start" I may get up to the windows login screen and then it shuts down and restarts. (sometimes it doesn't make it to the windows screen and turns off to restart). Then it will start to load windows and the little bar at the bottom will be loading windows and then freeze. I would have to hold the power button down to turn off and restart. Then I start windows normally and it usually works OK, sometimes I have to do this step again, but eventually I get into windows. Then if I shut down and restart it starts up fine, unless I wait for it to cool down.
Since this started happening, I have reinstalled vista 32bit to out of the box condition and updated to the latest bios, to no avail.
Computer has always run hot since new, seems to have very poor cooling. But the fan operates, most of the time on full boar.
Do you think this is a software issue or a component issue, or cold joint.
BTW it will not shutdown at all if I keep the computer in the F12 key settings area,im not sure what this place is called, but you choose to boot from cd here.
Okay, this is weird and I'm not sure if this has anything to do with what I had mentioned earlier. I was having some issues with my DVD drive, it was rattling bad and the spin off time was off causing coasters on almost every blank DVD, so I had the thing sent in for a replacement. They put in a new DVD drive, checked the status of my BIOS (V 4.2 which I had all along) and returned the unit back to me sometime around April 22, 2010 -- ever since the thing was working fine. I'm not sure if the bad drive had caused the unit to work erratically.
Before it was sent in, the issue was of course with the DVD drive, the startup then shutdown problems, plus a whole plethora of other small problems which I didn't bother to mention on my first post. For instance; the illumination lights that controls the media -- sometimes they would not turn off when I shut my computer down. The light stays on even after the computer powers off and I'd have to unplug the AC power cord for the lights to completely shut off.
My initial problems with the laptop was:
Media lights won't go off,
DVD drive rattles very loudly and burns bad media,
Shutdowns during startups,
The screen housing would creak every time when I wanted to adjust the position (this happens when I adjust it slowly).
After they replaced the DVD drive, everything seems to work fine. It's been almost two months now and I haven't had issues with any of the above mentioned problems.
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Computer shuts down during render/prerender

This was not my original problem but it has occured before and I know it will occur again.
My computer shuts down for no reason when I try to render or prerender video in Adobe Premiere Pro CS4. From what I can tell it is a general issue with premiere that I am having. I have tried multiple video formats, multiple video lengths, and multiple rendering options and I am still getting random shut downs during rendering.
Here are some specs for my computer which is a laptop:
OS: Windows 7 Ultimate (64 bit OS)
Proccessor: Intel Core 2 Duo @ 3.0 ghz
Ram: 8 gigs of it
Video: Nvidia Geforce 9600M GT
1 Hard Drive w/ 280 gb of space
As a recap.... My exact problem is that during the rendering or pre rendering proccess my computer simply shuts down as in it turns off.
I can also add that the computer does act strangely leading me to believe that theres some hardware or software incompatibility. While it is rendering I can hear the CPU fan pick up which is usually normal for any rendering application but what I noticed was that it doesnt stop speeding up. Its like if it was going into an overload and I can confirm that at its peak, the computer shuts down.
To add troubles... whenever I pre render any video and it succesfully renders.... Premeire will hang up really really bad if I try to play the pre rendered preview. In otherwords when you preview a video that it pre rendered it usually plays smooth and everything is fine. After I pre render something though and play it I can tell its locking up because the timeline bar is really jumpy and the video playback skips also.
This is the problem I would really love fixed. I usually have to button smash my keyboard until I lock premiere up and then once it unfreezes itself i can preview my work smoothly. This is however like a good 5 mins of my time trying to get the preview to play smoothly though so its really hurting how fast I can work.
If anyone can help me out I would greatly appreciate it. I will be trying to run the same stuff on my older laptop and observe the results. I personally think CS4 is incompatible with windows 7.

Video: Nvidia Geforce 9600M GT
If you have a recent nVidia driver installed, you might want to check to see if you have either of these two modules loaded - check in the nVidia console:
PhysX, or 3D Stereovision. If you have them, definitely disable 3D Stereo, and test. If no improvement, disble PhysX and test.
Also, try adjusting your Hardware Acceleration. If Max, set to Min and test. If Min, set to Max and test. If either helps, try incrementing up, or down, until it no longer helps.
Last, check your OpenGL settings. If ON, turn OFF. If OFF, turn ON.
It appears that you have a laptop. Is that correct?
Good luck,
Hunt

HT204406 What will happen if my computer shuts down during the initial setup of iTunes Match?

What will have if my computer shuts down or restarts during the initial start of iTunes Match?

Video: Nvidia Geforce 9600M GT
If you have a recent nVidia driver installed, you might want to check to see if you have either of these two modules loaded - check in the nVidia console:
PhysX, or 3D Stereovision. If you have them, definitely disable 3D Stereo, and test. If no improvement, disble PhysX and test.
Also, try adjusting your Hardware Acceleration. If Max, set to Min and test. If Min, set to Max and test. If either helps, try incrementing up, or down, until it no longer helps.
Last, check your OpenGL settings. If ON, turn OFF. If OFF, turn ON.
It appears that you have a laptop. Is that correct?
Good luck,
Hunt

Computer sometimes shuts down during boot, help please.

Hey guys,
My specs:
2500K @ 4.5 GHz 1.37V (12 Hours P95 stable + 10 IBT passes)
MSI Z77A-GD65
8GB DDR3-1600 Corsair Vengeance (2x4GB)
EVGA GTX680 Superclocked
Crucial M4 SSD 128GB
WD 1TB Caviar Blue
Seasonic X-650 PSU
The PC is roughly 1 year old and I built it.
Problem is, and this has been ongoing since I built it, sometimes, when I turn on the PC, it will start booting and then power itself off, after that it turns itself back on and Windows 7 loads, exactly what happens when you apple new OC settings for example.
There is never more than 1 shutdown when this happens and it never happens when the PC is on and working, just during boot.
I ruled out heating issues, everything is well ventilated in my Corsair 650D case, all fans are working and the CPU temps are good (Using Zalman CNPS10X cooler)
I think we can also rule out any PSU issues since I recently tested my PC with P95 again after updating my BIOS for more than 12 hours and it was rock solid. I've also never had a shutdown during gaming since I got the PC.
My Overclock is raw, I have disabled, EuP 2013, C1E, EIST, Overspeed Protection, Intel C-State.
Is there any BIOS setting which could be causing this? I noticed that there's a setting under EuP 2013 called "Restore after AC Power Loss" and you can choose Power Off/Power On/Last State. But I think it only related to occasions where the PC gets shut down due to a power outage?
I am inclined to think that this issue is more related to a MB BIOS setting than to the PSU since I never had any stability issues with the PC during OC testing or when gaming.
Which leaves me with the Power outlet. I am using an outlet splitter and currently there are 7 products connected to 1 socket:
1. PC
2. Yamaha RXV-471 Receiver
3. Morel Sub-8 Subwoofer
4. PS3 (Off 99% of the time)
5. Internet Modem/Router
6. TV Box
7. 42" LED TV Screen
The only thing I can think of is that maybe when booting up, not enough power is provided to the PSU and it turns off?
I have 1 other clear outlet next to the one being used and I'm fairly certain they both go to the same place in the panel because they are adjacent.
I can also try to replace the power cord, however, I replaced it once and I do recall it was happening prior to replacing the cord several months ago.
Any suggestions? Thanks

Quote from: xmad on 27-March-13, 01:37:42
That's normal, the memory you have is 1333 with an overclock profile of 1600. (XMP) The double cold boot has been an issue for ages on the z77a-gd65 although I thought it was corrected by the latest bios's.
Oh so true. When it is really cold in the morning, not always, at first start of the machine, I will get a double boot behavior on a Z68 G3. No big deal, as xmad stated, this double boot behavior has been a trait of Intel for a long time. Usually disable of EuP 2013 cures it, but the OC and particular frequency combinations play a part in it, and mysteriously, cold mornings once in awhile.

Macbook Pro shuts down during boot

Hi there,
Few days ago I spilled some beer on my 2 weeks old Macbook Pro... I immediately cleaned it, removed the battery and charger and left it to dry for 1.5 day.
After the drying period I tried to power up the machine, it did work but unfortutanely shut itself during the boot (the spinning wheel) and power button didn't respond again until I removed and re-connect my battery. Tried everything such as Nvram/Pram and SMC reset, single user thing, verbose mode, changing ram dimms but got nothing. It did eventually boot with hardware test but again got nothing as the test indicated that there weren't any problems.
It always shuts itself after "Checking catalog file" in the verbose mode.
(The machine shuts itself even when I try to boot it with os x installation disc so the only thing that I can reach is the hardware test.)
(To tell the truth I don't know if I succeeded creating a bootable installation disc as I did it under windows.. I'm hoping that I failed and that it can actually boot from dvd drive)
Did I just screwed my logic-board, if so how can I run all the tests.. Any suggestions?

egunay wrote:
Actually the computer is 2 weeks old, I spilled the beer 2 days ago.
Immediately disconnect all peripherals, power cord & remove the battery. Turn the computer over with the lid partly open and the hinge facing upward to let the liquid drain. Do not flop it over and lay it flat - you want to separate it from the moisture. Place paper or cloth towels under the machine to sop up the mess.
After the computer disgorges whatever you spilled on it, don't turn it on for 72 hours or longer. You want to computer to dry out completely before turning it on again.
Some users here swear by hairdryers. Blow drying the innards may bake whatever was in the liquid onto delicate computer components. Better to let the computer air dry.
Use plain tepid water to clean out the computer. If you spilled iced beverage more than likely this ice fried the hot motherboard.
Sugary, acidic or milky drinks will almost always cause problems later on as the residue starts slowly corroding the computer innards.
Swab down any sticky parts with distilled water or denatured alcohol.
If none of the above works, you will need to take the computer to a repair shop. Apple Care does not cover liquid or food damage. Believe me, they can tell. So the old "my computer stopped working" line is not going to work.
In order to not void your warranty any further, take it and let the staff clean it. It's worth it for a 2 week old computer. In the future, avoid eating and drinking while using your computer. Will avoid future heartache and expense.

Vp6321 projector shuts down during boot

I have a vp6321 projector that has been working fine up untill yesterday. When I turn it on, it seems to boot as normal, but during the boot sequence (typically while counting down the boot screen) the lamp is shut off and both status indicator lamps blinks one before the projector shuts down. From the manual I see that this is caused by an internal error and that I should contact HP Support. Is there any way to fix this?
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I am having the same problem with two of four of my vp6320 projectors.
I tried changing both the color wheel and lamp with no success.
Customer support DOES NOT EXIST for this product anymore.
I am not certain that it is an over heating issue, in fact, I am not at all convinced of one ailment over another. Sometimes the projector will turn on fine then shut down after a few minutes (followed by twin blinking lights, 3 seconds apart). Other times the lamp will not fire and a broken lamp indicator is on. Next I'll try again and it will flicker like mad and kill itself after about a minute. Then a new set of failures different from the last error will occur. I have no idea what to think.

Display shuts down during boot

I just purchased this imac 350Mhz for the kids. I got it all set up, hit the power switch on the keyboard or CRT, and hear the Apple chime at startup and the display comes up with a white screen with a thick dark black band at the bottom. After about 20 seconds, everything shuts down. This exact sequence happens every time I try to boot. Can anyone help on this? Is my OS incompatible with the system?
Here are the details on the system: iMac G3 350 MHz/128MB/7GB BLUEBERRY OS X 10.3.9
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Yes, problem with the video card sounds plausible! Any not so successful updates recently? It is sometimes to make a good uninstall, which is required to make a good install.
4in1 drivers should - esp. with W98 and ME - be installed while in SafeMode and with all autostarting programs disabled, for example Antivirus and utilities.
Else, since you have a damaged regedit, I would reinstall Windows. You might have done something for example an upgrade or new install the registry, not healthy, has made a note of. Some utilities also overwrite and change system files without good results.

Booting problem - computer shuts down during booting

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