IMac :: System Crashes Suddenly Like Power Failure
Sep 6, 2009
My IMac crashes sometimes very suddenly, like in a power failure. It doesn't force quit or shut down, it just goes like somebody pulled the plug. It's usually possible to start it up again after 30minutes or an hour. The plug and lead seem to be fine. I tested it on another mac. The obvious suspicion would be overheating, but how can that be caused so suddenly (and how can I fix it)? It's an IMac Intel core duo, 20", 2 ghz, 2gb ram from 2006. I'm running Mac OS X (10.4.11) 2006.
I tried the "search" box before making this thread. Would like to know if the power supply from a 2008 MacPro work on a 2006 MacPro. If anyone has tried this? My 2006 MacPro shut down suddenly and would not turn on. I use an APC UPS plugged on a power surge outlet. The Mac technician who examined the unit suspected it might be the power supply but Apple may not have in stock the power supply for the Ist Gen MacPro.
Have a white iMac (2Ghz Core Duo, 20" screen). It has started misbehaving slightly: it usually takes two or more tries to start from off, and has to have a hard restart if I've let it go to sleep on its own.If I have made it sleep myself, by pressing the power button, it always comes back, but it refuses to do so if I let it sleep on its own.My local reseller suggests that it may be a logic board fault: I'll have to pay ?70 to diagnose this and, if that's the case, the repair is uneconomic, meaning I've also wasted
I left my iMac on overnight last night to finish downloading some stuff. I woke up and all our clocks are flashing, so we must've had a blackout. Anyway, I went to check the progress of my downloads, and the iMac was off. I pushed the power button and nothing happened. No fan noise, HDD noise, nothing. I've been trying for almost two hours now and nothing is working.
While installing windows 7 via bootcamp tonight, I suffered a power failure a minute or two into installation. Upon reboot, I have only a black screen with flashing curse. I have attempted to reboot in safe mode, recovery mode and diagnostic mode, but I think the machine is not recognizing the keyboard.
Info: iMac, OS X Yosemite (10.10.1), 2014 21.5" Fusion Drive
It looks like the hard disk in my 1.5 year old iMac (24" 3.06 C2D, running 10.6) suddenly failed today. I woke the mac up from sleep and pretty much immediately I got a spinning beach ball. The system was totally unresponsive so I did a hard reset. Unfortunately the blinking "?" folder came up on the gray screen, instead of the familiar Apple logo. Booted off the OS X disk and ran Disk Utility. The hard disk comes up as "media" and unrecognized by the system. So no First aid or formatting possible. I'm guessing the hard disk has given up but before purchasing a new one I want to rule out anything more serious like motherboard issues.
a friend recently gave me a g5 power mac that had some issues, and the failure was described as intermittant. The machine supposedly would work properly when booted and start freezing up after time, but if turned on the next day it would work properly for some time. I assumed it was an overheating issue, but apperently there is more to the picture. I have tried booting the machine quite a few times and the display always reads no signal. The machine sounds as if it were booting normally, but there is not output. At first I assumed it was my display cable, which was a DVI-D single link, however the DVI-D dual link cable leads to the same result. Is it nessicary to have a DVI-I cable? None of the error LEDs light up on the motherboard. After doing some hunting I haven't found anyone with the same issue, but I am wondering if I should assume the graphics card is dead. What steps do I need to take to isolate a graphics card failure in a power mac g5?
i have had problems with my iMac, whenever i play the my game on Java, it crashes, yesterday it started out slow, happened like every 2 hours, but right now, when i get the error, only option to pull the plug, and then restart, and i open the game again and it happens within 5 mins, i made a video of what it looks like on youtube.(Btw, its lower half of the screen black, and the top is flickering) I cant do anything anymore, i can pause the music by keyboard, which i couldnt do before on the older crashes from yesterday strange enough, and i can move the mouse, but i cant click anything or w/e.Cmd - alt - esc doesnt work either
I'm running a late 2009 iMac, 2.8 GHz Intel Core i7 with 8 GB memory with 27 inch ATI Radeon HD 4850 512 graphics card running 10.9.4 OSX.
I will get spontaneous crash of the system that causes small blue squares over the entire screen. The problem will resolve after 1-2 restarts. I ran the system diagnostic disk and found no problems on the long and short versions. It is an intermittent problem as the display and system are running fine now but daily will have the crash occur. Once the spots are present the computer will be frozen with no response to keys or mouse.Â
Info: iMac (27-inch Late 2009), OS X Mavericks (10.9.4)
Very occasionally the screen on my iMac (early 08 24") goes blank and it makes an incredibly loud static sound that's independent of the volume control setting. The power then needs disconnecting to restart the machine. Haven't been able to tie it to any specific program. Apple Care asked I leave it on logged in on a new user account (at the time I originally thought it only happened in sleep mode, but have since discovered this is not the case).
It's happened maybe 3 or 4 times in the same number of months. I've only found one similar case on the net, with someone suggesting it was Safari 4 beta, which I've found not to be the case with mine. It's on extended warranty. I think there's something seriously wrong with it (it's already had the hard drive and power supply replaced).
My perfectly wonderful Mini has started doing the following, in this order:
First, I could no longer double click on a word but the right button functions still worked (and yes, I did try another mouse and had the same problem, then I switched the mouse preference to double click with the right button, but had the same problem). This started two evenings ago.
Second, the next morning, I suddenly couldn't drag the cursor across a word, or a sentence, etc. Now it was really getting annoying, because in my work I paste and copy a lot, and this caused me much, much extra work, so it's not a minor gripe.
Then, by that afternoon, I had a complete system crash. The whole screen froze. I tried turning off my Mini with the power button (which I hated because I know you're not supposed to), but the screen remained frozen.
At that point, done disk repair thing from my original instal DVD. Well, it unfroze the screen, but did not fix the mouse/cursor problem. Clear the PRam. That still didn't work. The next morning (today), it crashed almost immediately. Again, totally frozen. This time, I reinstalled the entire system from the instal disk. No luck.
I came across an app I'd bought the last time I'd had bad Mini problems (and had forgotten), called Disk Warrior, so I tried that. Well, it did find three unfixable, corrupt .plist files that it said could cause system disruption. I thought I'd found the problems. So I deleted all of them AND their apps, downloaded fresh copies of the apps, and restarted. Still same problems.
So, I ran Disk Warrior again, and it reported those same three corrupt plist files. Then I realized it was reporting the ones in the trash, so I emptied the trash, ran Disk Warrior again, and it said NO problems. Restarted and tried to highlight some text, and it worked! But it still wouldn't double click.
Info: Mac mini (Mid 2010), Mac OS X (10.6.8), Mac lover since the SE
I have a late 2009 Mac Mini with 8GB of OCZ 1333 RAM and an Intel X25-M 160GB SSD. Running 10.6 fully updated and installed from scratch.I have been getting out of the blue crashes while the system is most of the times idle. Can it be the RAM? It's reported fine as 8GB 1333 DDR under the system info. The Intel SSD runs latest firmware.
This is the log from the last crash which happened a little ago.
Interval Since Last Panic Report: 139426 sec Panics Since Last Report: 1 Anonymous UUID: 01A96B0F-D497-443A-8E19-9111DF3604EE
I've been having problems with my programs crashing lately, and the message is always the same : Bad Access Kern Protection Failure. Often they crash as they're opening, and restarting them works, but sometimes they crash for no apparent reason while I'm using them. Affected programs are After Effects CS3, After Effects 7, Cinema 4D, Photoshop CS3, ITunes, even Safari and Mozilla Firefox. More or less all my programs.
I've run Disk Warrior, validated my fonts, removed programs that seemed to be problematic, trashed preferences, and the problem keeps occurring.
I've noticed other people on this site have posted the same problem but I can't see the responses.I'm on a Mac G5 with a Dual 2 Ghz Power PC Processor, 4 GB of RAM, Mac OS 10.4.11.
I have a G5 Power Mac dual 1.8 running 10.5.8. It powers a radio stations automation system. I have it set to power on after a power failure but for some reason it will not power on. I have to come t the station and reboot the system manually.
I am brand new mac user, never used it before, I just got an older iMac and want to learn about it. I need help to know what's the newest system that can be installed on it.
its 500 MHZ power pc processor 30 GB Hard drive 512 Ram
I want the newest possible system so I can start on a newer system espicially since i am still a starter. Another question I have, do i have to purchase a cd to install a system or is it possible to download it from the internet?
I returned from a trip during which I used my MacBook Air (Late 2010) constantly. Upon leaving the hotel I closed the computer and put it into my carrier and did not open it until arriving at home later that day. There was moisture on the keyboard and screen at the corresponding position in an area about the size of a 50¢ piece, I cleaned that up and turned the machine on and it booted up and then created. Several times it would turn off and on a few times without any input from me. At times it will boot up like all is well but with any keystroke it crashes to a black screen. If I had to guess, I'd say the HD is toast. It was replaced under warranty once already. The moisture is a complete mystery.
I put my i5 to sleep around midday, came home from work @ 4, and my iMac would not respond to keyboard, mouse, or power button mashing. My wife noted the power had gone out upon seeing the microwave clock. I checked the outlet (her Macbook was plugged into the other receptacle), and there's still power going to my machine.
My problem is that in a morning when i turn on my mac G5, it lights and then fade and also make a sound like PAC.
But is it from the power supply and also how to avoid this accident.
I just send it to the seller Apple to repair it, but i need to wait, maybe got it within 1 or 2 weeks.
my Second problem is that if at night, i let my mac G5 auto boot, anyone can tell me if it may got this problem same the first one when my G5 turn on by itself.
I have this iMac for slightly over two years and when I forst got it I thought it would be a good idea to have it start up a 6:55am each weeday. After about a week I changed my mind and went back into Power Saver and turned off the settings. Since then, I can't tget the machine to quit auto-starting at 6:55, 7:55 and even sometime 8:55. I have called Apple, taken it in to an Apple store, they even claim to have replaced the computer
G4 733 D/A , 10.4.11. This morning there was a few second power failure according to my wife. Ther G4 shut down from the power failure. I didn't have "restart after power failure" selected in the Energy Saver prefs. I restarted the G4 when zi got home and after I was done with it, selected SLEEP from the menu. The G4 wouldn't respond to sleep. I logged out and tried SLEEP from another user acc't and from the login screen. I then went into the Energy Saver prefs, made sure everything was as I wanted ( 5 min display sleep, 10 min HD sleep, and "put disk to sleep whenever possible". I then rebooted and sleep still wouldn't function.
While working last night I got a short power failure in the house. Right after that when I tried to start my mac mini again, it booted up to the log in scren ok, but when I try to login, a white screen appears and then it goes right back to the login screen.Â
Things I have tried: Tried to fix disk in recovery, no errors were found.used resetpassword in Terminal for my user account I can't get into safe mode, I'm trying to hold the shift and release it before progress bar, but safe mode doesn't come up?
why i have to unplug the power cable from the back of my imac after every power failure at my home to get the imac to boot up. I've tried resetting the surge protecter and unplugging there. However, the only option is to unplug the cord from the back of the monitor/imac before it will boot up.Â
I have a PowerMac G5 computer, running OSX Version 10.4.11. Up until yesterday, the computer performed flawlessly. Suddenly, yesterday, I get a message from Firefox (the browser I usually use), telling me that my Flash Player had been disabled because I did not have the most up-to-date version of Adobe Flash Player. When I investigated, I found out that the newest version was NOT compatible with my computer. So I tried reinstalling the most recent version of Adobe Flash Player that IS compatible and have had no success. When I go in to System Preferences and click on the Adobe Flash Player pane (under other), I get a message reading "could not load Adobe Flash Player." Someone out there must know how to handle this. I'm not in a position to purchase a new computer, and I desperately need Flash Player for some of the websites I use quite often.
Just recently (this night,) whenever I would unplug my main USB hub, my iMac (Late 2006) would turn off (that is, instantly shut down as if the power had been disconnected). I don't know why this happened, but it turned on immediately afterward so I shrugged it off. The last time this happened, (the 4th time,) the iMac wouldn't turn back on at all.
It responds to power button presses, and you can hear the harddrive spinning up and the CD drive whirring and fans spinning. The sleep light in front stays on, but the display stays black, and it doesn't make the characteristic chime when it "turns on". In addition, it doesn't seem to be delivering power to USB devices, so there's no way that I can boot up from a startup disc or anything to see what's going on.
What do you guys think could be wrong with my computer? I doubt my non-existant applecare would cover anything of this sort, and I'm pretty sure that i'm SOL for hopes of a computer that just works. In addition, one other question. I was working on a VERY important school assignment at the time, (cliche, I know,) so is there any way I can connect another computer to my iMac so I can get my school assignment off of it?
Information: G5 Intel iMac (Late 2006) Mac OS X (10.6.4)
I just bought my Intel-based iMac last night and it took forever to turn on out of the box. I guess I made a mistake by doing a "soft" power down last night, because this morning it will NOT turn on. I've tried using the power button and waiting. I've tried unplugging and plugging it back in, and then using the power button, and waiting. Nothing works. I've been a PC user for 20 years and just bought this, my first Mac, last night. I think I've made a huge mistake! How the heck do you turn these things on????
Someone switched off the power to my iMac the other day. Since I've rebooted:a] System Profiler shows no awareness of FireWire ("Unable to list FireWire devices" in red) b] Every boot takes about five minutes, 3+ of which seems to be spent waiting for a response from the FireWire socket (the logs show a 3-minute gap followed by a line that goes something like this:"/usr/lib/exec/hidd: Timeout waiting for IOKit to be quiet") c] if it's idle long enough to go to sleep, it goes into a kernel panic (the last line in the log before the panic says"kernel[0]: IOPMSlotsMacRISC4::determineSleepSupport has canSleep true")b] looks connected to a], but I can't see any connection with c] (apart from the reference to IO).
I have an extensive collection of fonts (60,0000+). Several hundred of them will crash my system when I open one of them in Finder (double-click the suitcase). I picked one at random for some serious examination. I looked at my sample with many font tools. My latest tool was FontDoctor (v5 and v7). FontDoctor reported "no problems found" with my font. Yet the crash persists. Any tool that can do a thorough job of investigating and repairing my corrupt fonts.
I have a 2011 MacBook Pro 15 inch, and the Messages application has been installed and functioning well for the past year. A few hours ago, my MacBook ran out of battery and died on me. This caused a number of applications to function incorrectly, however, after a restart all of the applications EXCEPT Messages work correctly. Now whenever I start up the messages app and try to send a message to one of my contacts, their name appears in red and I receive a message that says "###-###-#### is not registered with iMessage." This occurs even though the contacts DO have iMessage and were working in the past. None of the contacts work currently.Â
I tried signing out of Messages, restarting my computer, restarting iMessage from my phone, deleting my plist file, but none of these seem to alleviate the issue.
