IMac :: Suddenly Shuts Down - Screen Warm
May 25, 2009
I received my new iMac on May 20. It is a 3.06 with an ATI card. I have not had much time to use it until this evening. I had been been setting up some bookmarks in Safari and then was working on a spreadsheet for about an hour when it suddenly shut down. The power strip in which it was plugged in still had it's light on. The iMac is the only item plugged into the strip. I then felt around the screen, the bottom section was cool but the top was rather warm.
The temperature in the air conditioned house is 71�F. Programs open at the time were Safari - which was on an idle screen as I had logged out of a site. Two sessions of Finder Entourage Excel - which I was actively using. Is this an over temp shutdown? I recall some people posting the temperature of their Macs. Are there any monitors on the iMac to see how hot it is running? There were no warnings that it was going to shut down.
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Apr 23, 2012
I have an old g4 , the kind shaped like half a golf ball, which starts up and then quits at different places during the process. Sometimes with the gray screen and Apple logo, sometime later when the OS has fully installed,but fails quite rapidly after that. Then tries to reboot itself with varying degrees of failure.
Info:
mac g4, Mac OS X (10.4.9)
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Jan 3, 2009
On my second macbook and notice a difference in this one as opposed to the first one (although in all fairness i didn't use my first one all that much as i had to return it because of bad vibrations). I have no programs running and all I'm doing is lightly browsing the web (craigslist, macrumors, gamefaqs). My temps are 42C and approx. 1801rpm. I think this is normal, but my palmrest really warms up. Not to the point I can not use the notebook...just wondering if this is normal...
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Apr 26, 2012
My 27inch iMac screen shuts off during screen saver and does not come back on unless restart machine?
Info:iMac, Mac OS X (10.7.3)
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Mar 19, 2010
This started about 2 days ago, there was no apparent signs of such a thing going to happen.
My MacBook suddenly shuts down in the middle of my work. Shut down as in a sudden shut down, as if the battery was removed. There is no shutdown process, the whole screen just goes black. I've realized that this happens more recently when watching youtube videos, playing flash games etc.
Example : Computer dies in 10 minutes when watching videos/playing games. Computer dies in a few hours or NEVER when just typing, surfing.
It doesn't seem to be a battery problem. I've removed the battery and had my Macbook run on the Charger before, and it still died on me...
Battery Information:
Battery Installed:Yes
First low level warning:No
Full Charge Capacity (mAh):4390
Remaining Capacity (mAh):2128
Amperage (mA):-1720
Voltage (mV):11081
Cycle Count:495
Mac OSX 10.4.11
1.83 GHz Intel Core 2 Duo
1.25GB 667 MHz DDR2 SDRAM
I run bootcamp, same problem on my other operating system
Hardware Overview:
Model Name:MacBook
Model Identifier:MacBook2,1
Processor Name:Intel Core 2 Duo
Processor Speed:1.83 GHz
Number Of Processors:1
Total Number Of Cores:2
L2 Cache (per processor):2 MB
Memory:1.25 GB
Bus Speed:667 MHz
Boot ROM Version:MB21.00A5.B07
SMC Version:1.13f3
Serial Number:4H7110U8WGK
Sudden Motion Sensor:
State:Enabled
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Jul 7, 2009
I have a mac mini intel and I was in the middle of working with my blogs, then there was an annoying spinning wheel of death, so normally, I would hold the power button for few button to restart and I did. then when the desktop was loading, everything was back to the "new" desktop with alot of stuffs missing, so I restarted it again using the apple menu, then the startup screen took so long and out of nowhere, it shutted down by itself. I tried to power it on again and again, unplugged the cords, still didn't work.
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Jul 20, 2010
when ever i log into world of warcraft. and start playing after five minutes my screen will just shut off but the computer will still be running. maybe the video card ?
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Aug 24, 2014
I just got home and I realized the power was out. I bought this iMac literally like two months ago (I actually bought one two months ago but it wouldn't even turn on so they gave me a new one) It was working perfectly fine, and I was writing a report. I left the computer on and left the house only to return hours later with the power out, and when I turn it on it shows the start up screen with the Apple Logo, the little progress circle, and a progress bar that fills up to the end everytime but once it fills up to the end it stays there for a few minutes then the computer shuts off.
info:
iMac
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Apr 6, 2012
It just suddenly shuts off and I need to turn it on again
Info:
MacBook Pro, Other OS
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May 20, 2012
My imac suddenly shuts down while on line. It has to be unpluged for a couple of hours before it will restart. Could it be the battery dying?
Info:
iMac, Mac OS X (10.6.8)
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Mar 1, 2007
I have a Dual 2.0 Powermac G5 that has been shutting down without notice. It first started doing this every couple of days. I'd have to let the computer sit for a few hours before it would run again. Now it does it more and more frequently and stays running ofr less and less time. As of now, it will only stay on for 15 minutes before suddenly shutting down.
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Nov 5, 2007
I was hoping you could get me started in the right direction. My wife has an iBook G4 which lately, while using a full battery, just turns off suddenly. There is no warning and it never does it when it's plugged in. The battery looks like it's almost fully charged - at least that's what the meter in the menu says, so I don't know what's going on.
Could you possibly give me some steps to go through to try and figure this out?
The first step she wants to try is to get a new Intel MacBook, but I'd like to try a couple of other things first!
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Mar 2, 2008
I've had my macbook for about 15 months. i noticed a while ago it had trouble turning off completely when running only on the battery. then a few weeks ago it shut itself off and wouldn't start up again. the power cord indicator was orange, but nothing worked. ordered a new battery, that didn't help. tried a different power cord - nada. i took it in to an apple repair shop and they said something about the internal power connector (i'm not a techy) and took 2 weeks to repair. i've had it back 3 weeks now and the same thing has happened. only this time there is no indicator light on any of the power adapters. and my partially charged batteries do not work on their own either.
any ideas? i don't want to keep fixing the same thing and every few weeks it keeps breaking again. i mean, what's the point in having the computer then, right??
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Jun 4, 2014
I have a 27 inch desktop. Upon turning the computer on within seconds the fan comes on. Then it goes to a high fan. Then it goes to a black screen. Then it shuts off. Then if you click the mouse it will come back on. This cycle repeats itself every 5 seconds. Only one time in the past month did it turn on normally and run for me.
Info:
iMac
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Dec 8, 2014
The day after I installed the update(10.10.1) for Yosemite, regularly my iMac suddenly stops working by showing a white screen. After 10 seconds, the iMac reboots automatically and again shows a white screen. Than, it stops. No action. No noise. I'm always obliged to stop the iMac by pressing the start button and restarting by holding the 'shift' key otherwise I have to look at a white screen again! In the save modus, I can work(typing this story) and restart the iMac. After a while, the whole show starts again. What can I do? Installing Yosemite again and whiteout the update? Can I undo the update? This once, I made no backup before the update(Murphy's law).
Info:
iMac, OS X Yosemite (10.10.1)
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Sep 23, 2006
Ever since I sold it here on MR and got it back, there has been a problem with my 12" Dual USB iBook G3 500MHz's screen (lord, that's a long name). Whenever the screen is tilted back farther than 45 degrees or so, the backlight shuts off. I can open the casing and fix it if it's possible. Does anyone know what the problem with it is? I'm trying to get it fixed up and ready to sell back to my friend as his first Mac, and I'm trying to get every problem resolved
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Sep 13, 2009
I recently acquired a Mac when I noticed my neighbor was selling a G5 iMac (PowerPC) for 10 dollars. I got OS X Tiger installed and everything seemed to be going normal except for one thing. When I first turn on the computer after a while of not using it the screen goes static and it's impossible to use. At first I can't even get past yaboot without it freezing. I noticed that after about 5 restarts I can load OS X but parts of the screen still flicker for a couple more minutes. If I boot up and leave the computer at the yaboot screen for 10 minutes and then restart everything works just fine.
I have a feeling this is a faulty power supply but I wanted some other opinions before I go order a replacement.
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Mar 27, 2009
i had the macbook Core 2 Duo for About 8 months and it was working great.
yesterday i left a file download in firefox for 5 hours then went back to check on it , it was working FINE, Then i got Back after 2 minutes and the screen is suddenly white and not showing anything i shut down the laptop and restarted , there was a chime and just white screen...i connected the laptop to an external monitor AND EVERYTHING IS WORKING on the external screen but the laptop screen is white!
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Jan 19, 2009
lately, my mba has been behaving a little weirdly. its screen would suddenly become a little dimmer when the brightness in the room has not changed a bit. after a long while(15 min?), it'll turn brighter again by itself, and again without any change in the lighting of the room. the change is not big but obviously. any idea? can it be some software? or setting? or a defective light sensor?
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Jan 23, 2008
I have a dual 2 gig G5. I can run it for about 20 minutes, then it's starts to smell like something is burning. The screen fuzzes out and it shuts down. Power supply maybe? It runs fine up until the point where this burn and fuzz kicks in.
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Jun 18, 2012
My MacBook Pro screen randomly goes black, yet the laptop still has power. I usually have to reboot in order to get back into the computer.. as moving the track pad doesn't bring the screen up.
Info:
MacBook Pro, iOS 5.1.1
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Nov 27, 2006
My wife has a three-year old iBook G4 and yesterday while she was doing some work, the screen just went black. By the time she brought it to me the machine was shut down. I hit the power button and it started to boot up, but about five seconds later it shut itself down again.
I kept playing with it and I was able to get back in to OS X and I played with it for a few minutes and all seemed fine. I then shut the screen and put it to sleep, then when I tried to wake it back up it shut itself down once again.
After a few more tries of getting it back in to the OS I was able to get all her files off the hard drive, but the problem is still there.
My guess is that it's the logic board, but that's just a guess.
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Feb 24, 2009
So my computer froze while I was waking it up from it's nap, so I restarted it by holding down the power button. It now shows me the gray screen, apple sign and spinning circle for about a minute before it's decided it's done and would like to turn itself off. I have tried resetting the PRAM and the SMC. I have tried restarting in safe mode. I tried to restart it off the AC adapter without the battery. I hear the chime, I see the apple, and the status circle, and then nothing!
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Mar 4, 2009
I'm desperately trying to get my 3 year old macbook to cooperate - it operates fine although it has been very slow lately but occasionally it will freeze and flash a blue screen, then either just remain frozen or shut down. When I try to turn it back on, it responds as normal, but as the desktop, wireless bars, etc start to load, the pinwheel comes up and then the screen flashes blue, and the whole process of loading the desktop starts over. This repeats endlessly until after turning on and off a few times and waiting about ten minutes it will finally turn back on- something is clearly up and I'm afraid I am going to lose data.
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Feb 19, 2012
I have just replaced the display panel in my MacBook Pro (A1260) and now it is behaving oddly at startup. The backlight lights up normally until the boot process gets to the Login screen, at that point the LEDs shut off. I can see the images on the display, (the LCD seems OK,) the only issue is that the LEDs are turning off.
Here's what I've tried:
1) If I boot in Target mode, the screen stays lit. (As expected.)
2) If I reset PRAM, the lamp behaves normally, staying on through that session. If I restart, the lamp-off- condition returns.
3) I have reset the SMC per instructions here, [URL]. No change, LEDs shut off.
Info:
MacBook Pro (15-inch 2.4/2.2 GHz), Mac OS X (10.6.8)
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May 15, 2012
I came home to discover my power cord had died and my laptop turned off due to no power. I used a friend's power cord to turn it on later that night and send some emails. I bought a new power cord the next day, plugged in, and turned the laptop on. It stayed on the gray screen with a spinning wheel beneath the apple logo for a while. I restarted it and it turned off after a few seconds of the gray screen. An empty bar flashes twice horizontally at the bottom before the spinning bar begins.I tried booting in safe mode, but it would just stay on the gray screen. I tried doing shift+command+v and received a message about keys out of order and disk error full, can't repair. I was able to boot from the install disc, and when I click "Repair Disc" I get the same erros. Not sure what to do now?
Info:
MacBookPro, Mac OS X (10.6.4)
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Apr 10, 2010
My iMac (21.5") turn off by itself and it doesn't turn on until I unplug the AC from the back and let it rest for at least half hour!!! If I try to turn it on I only get fan and drive noise but no screen at all... The longest time I let it rest, the more time that I can use it. I already reset PRAM. I'm runing 10.6.3 and the biggest software I use is ArchiCAD 13...
Does anybody have a similar issue with his/her iMac?
PS. Sorry, I don't speak/write good English but I did my best...
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Jan 31, 2012
i am using my monitor from old Leopard computer. It works fine on the Mac mini running Lion. When not in use, instead of using the screen settings it shuts down. I have to click the mouse and sign in.
Info:
AppleTV 2, Mac OS X (10.7.2), Mac mini 2011 iPad 2 iPhone 3Gs
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Jun 24, 2014
My MacBook Pro 2010 15 inch screen shuts off randomly. The whole laptop doesn't shut off just the screen. It calls it a panic but I have to hold down the power button to shut it off when this happens or it will stay on the black screen.
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Oct 31, 2007
My new Alu iMac just randomly shuts off. It's happened like 5 times (once while I was typing a paper). I have updated to 10.5, and it has happened twice since the install.
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