MacBook Air :: Intermittent Shutdown Even After SMC Reset
May 6, 2012
I got a strange issue on a recently bought MBA 4.2, a week ago I start to get sudden power off, then i can't power it back using the power button, to get it start i have to unplug and plug again the power cable. Then after the boot, shut down repeats between 20 sec to few minutes, with the battery almost full and the power connected. The system is updated (10.7.3).
After research I decide to reset the SMC (3 times now) using the proper apple procedure describe below, it does work for few hours but the problem come again within a day or two maximum no matters witch application are in use or the power supply / battery. [URL]. In last option I'll will reinstall lion...
Info:
MacBook Air, Mac OS X (10.7.3)
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May 28, 2012
I am on my 2nd power adaptor with for my MacBook Pro which I bought in 2010, the last one just died just had flashing lights, the new one about 12months later is being a pain, it will only charge in a certain position, I have to keep the cord tought so that the magnetic adaptor is at a angle in the socket.Which as you can tell is a right pain in the backside!
Info:
Mac Pro, Mac OS X (10.6.8)
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Jul 4, 2012
It has been a while i havnt used my MacBook Air. I forgot my passwords to enter.How do I completely reset my computer so that passwords are disabled or just reset?
Info:
MacBook Air, Mac OS X (10.7.4), TalkTalk; Huawei Echolife HG532
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Apr 15, 2012
My iMac 27 late 2010 does not shut down when shut down in the normal way. I have to shut down with the push button. I have tried disconnecting all the usb connected hardware still no use. Can any body help.I have OS Lion 10.7.3?
Info:
iMac, Mac OS X (10.7.3)
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Nov 27, 2010
During the first months of owning my new 15-inch MBP, I had at least three freezes. I remember there being a huge thread about this, which I can't find now. Happily though, my MBP no longer freezes, but I haven't done anything to it (other than software updates). So, was it a software glitch? Everyone were shouting about some sort of controller chip or something before, if I remember correctly...
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Sep 11, 2009
Ok, this is kind of hard to describe without a recording of it but my MacBook has this frustrating fault where it beachball's without warning and produces a really hard to describe sound every few seconds. The best I can come with to describe it is an "uh-oh" sound from around the keyboard area. It hangs like this for anything from 2-10 mins and will be pretty much unusable in that time.
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Sep 8, 2006
My system has randomly shut down twice now in the last two days. Dual G5 2.3. I checked the console log, which I know very little about, and it said this:
localhost kernel[0]: ApplePMU::PMU forced shutdown, cause = -122
Two questions-
what's the -122 code mean?
Do you think resetting the PMU would be the solution to this?
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Sep 18, 2008
For a while now, I've been getting a strange whine out of my mbp core duo right above the power button. I don't believe it's the common "whine" others have complained about as I've tried brightening the screen/turning on the camera. Tapping on the case will stop the sound for a bit, but it soon returns. The sound comes and goes, but in incredibly irritating.
I have a sample here. You may need to turn up the volume to hear it. Yesterday I replaced the right side fan, but the sound is back. Now I'm thinking it's the speaker, but don't want to spend more money on parts unless I'm relatively confident of the problem.
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Mar 20, 2012
I have a 2 year old macbook that just refuses to connect to my wifi, I also have 4 other apple devices that connect seamlessly. it registers the network, it joins the net work and then fails, I have had several different error messages as follows while re entering my password I get a dropdown box saying I have changed settings, this then sends me back to the preferences to start again. and then i get error message that my password is incorrect (I can confirm it is correct) I have also been to the genius bar, and we managed a connection for the duration of the visit ( a healthy reading too apparantly)they carried out a hardwear diagnoistics check and it was given a full bill of health. I was advised to insert the reinstallation disk and carry out a reinstall - I have done this and the problem is still there. Â
Info:
MacBook, Mac OS X (10.5)
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May 20, 2012
I have owned my MacBook Pro since June 2010, and have always used a pair of independently powered (via adapter) external Dell speakers for audio output. Since upgrading to Lion about 1 month ago, I was having intermittent audio issues, which were resolved by re-starting my computer (not ideal but it worked). Today, the speakers just stopped working. The internal speakers work, but when I plug the externals into the headphone port, they don't produce sound. Earbuds in the same port also don't work (but the earbuds are good). The external speakers are being recognized by the sound panel in system preferences.
Info:
MacBook Pro, Mac OS X (10.7.4)
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Jun 14, 2012
MacBook Pro (15-inch, Mid 2010): Intermittent black screen or loss of video. I do hope they replace it.
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Jul 4, 2012
I have a MacBook Pro 2012 (Lion) and am connecting to my monitor via the mini displayport and a VGA adapter. This worked fine for a while, but now is intermittent. It's not the cable or the monitor as I have tried with several and get same results. The port works fine with an Apple monitor and no adapter. I've seen several threads on this, but no solutions other than starting up with monitor plugged in which I've done.I updated the OS and it worked fine yesterday, but today not working again.
Info:
MacBook Pro, Mac OS X (10.7.4)
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Jun 23, 2014
I'm experiencing a intermittent screen scrambling on my MacBook 2 GHz Core Duo. It's a 3cm block which runs vertically down the screen and scrambles/inverts the colours in a flickering way.Â
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Sep 11, 2007
I've recently converted to mac and replaced my 8 month old Vaio AR11s with a new white macbook(2.16ghz). Recently I am having all sorts of problems with the wireless. I've been reading this forum for a week of so now and realize that I am not alone with my WiFi woes. My problem is the fact that my wireless intermittently drops and although the signal strength is still showing full I have no internet connection until i turn off and on the airport card.. this happens on both psu and battery!
I have tried installing the 2007-004 update, deleting the airport.plist file and the 2007-002 update and it appears to fix the fault for a while but then it comes back. I' ve also messed with enable/disabling frame bursting,different channels on my netgear wnr834n router but my other mac(using ethernet, bought a 24" imac tuesday!) and wifes vista laptop (wifi 802.11g) are fine so I have ruled out the router.
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Jun 4, 2012
My November 2011 17" MacBook Proi has on several occasions gone to a black screen, which requires hard shutdown and re-boot. It happens in two ways: coming out of sleep, the screen appears for a second and then goes black, and sometimes when jjust using the Mac.Â
It comes back on after re-boot with no apparent problems but seems to be occuring more frequently, so I need to get this fixed.Â
Info:
MacBook Pro (17-inch), Mac OS X (10.7.3)
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May 22, 2009
I use MSN Messenger 7.0.2 or 6.0.3 (i can't remember which one I installed but its either one) on my Mac OSX. I was able to sign in regularly on my Mac, until a point in time when I could not. The error message said that either i am not connected to the internet, or the server is too busy to respond.This happens once every other alternate day and it affects the application for the entirety of that day. I will have to wait for the next day, to see if I can successfully log in using that application again. I have tried re-downloading the software again, to no avail.
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Dec 31, 2007
Sometimes when I push the power on button to boot up, the boot is incomplete and fans begin racing. I power off and try again, usually three to five times, each time getting a little further in the boot till finally it is successful. My Apple disk diagnostic detects this logic board error: 2FAN/4/8: Fan for backside. The problem has been around for a year, maybe two, but it is getting worse and worse.
What other things might I do before jumping to the expense of replacing the logic board?
I have run permission repairs, run ONYX maintenance routines, blown out the dust, scanned the surface of my hard drives...
I keep reading and searching for things to try. I'm going to replace the computer battery now. Should I press the SMU reset button?
I've been looking at the long list of read outs in my console and system logs, but don't know how to make sense of it. My system was pretty stable until about a month ago when I tried to update to QT 7.3... at least I think that's what started a host of software problems... including lots of Safari crashes, and problems exporting Final Cut Pro movie files. So I've got what I think are hardware and software issues. But for now I'd like to focus on the hardware problem discribed above with the logic board error. I only mention the other issues in case they might all be related.
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Nov 13, 2006
I have one of the 20" iMac G5's covered by the warranty extension for the intermittent shutdown problem. The problem is that I am out of the country, and where I am has very unreliable Apple service. It would be gone for weeks and weeks. I am considering flying back home to get my computer repaired. The computer shuts down multiple times a day without warning.
What are the chances I can find an AASP in the DC area who can do the repair in a day or two. I have read that the repair is only a power supply swap and can be done in 15 minutes. What do y'all think?
My other option is to just buy a new computer and worry about repairing this one in a year or two, which is a $2,000 hassle.
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May 24, 2007
We have had a little powerbook G4 since about a year now. Such a great little stable machine that we have never had any problems with it. As a consequence, we still know little about it (usually I learn about machines/software by running into problems). Now, the wireless starts working intermittently. Sometimes it works fine and at other times it will not even indicate that our home network is present (whereas we have two other laptops (Win XP) that show that the network is active and has excellent strength). So at these times we are unable to re-connect. This started about two weeks ago and starts to get worse (it will more often not find it). Restarting does not work, but sometimes, when trying again the next day or a couple of hours later, it will work again. Should we just go ahead and get a new wireless card for the p-book?
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Jul 13, 2009
I love the mouse (is it the mighty mouse?) which comes with the imac. The little scroll ball is brilliant especially for say scrolling down in itunes. But I always find that sometimes it won't work in a variety of different ways. i.e.
1) Sometimes it will let me scroll down but not up
2) sometimes up but not down
3) sometimes not up or down
4) occasionally it works both up and down.
As I type this I can go down but not down. I've had this problem on both our older IMac and now our new one. It can't be dust and muck and the ball does rotate. Why can't the ball just work all the time.
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Mar 31, 2012
Desktop crashing irregularly within the last week. No upgrades of late. Hardware checked okay. RAM checked okay. Rest SMC. Rebuilt volume. TechPro no issues. Latest crash report makes me wonder if isn't intego's virus x6. I've read many threads, but nothing is jumping out at me.Â
START:Sat Mar 31 08:40:24 2012panic(cpu 3 caller 0xffffff80002a7c2e): "TLB invalidation IPI timeout: " "CPU(s) failed to respond to interrupts, unresponsive CPU bitmap: 0x80, NMIPI acks: orig: 0x0, now: 0x0"@/SourceCache/xnu/xnu-1699.24.23/osfmk/x86_64/pmap.c:2225Backtrace (CPU 3), Frame : Return Address0xffffff812a92b880 : 0xffffff8000220702 0xffffff812a92b900 :
[code]....
Info:
Mac Pro (Early 2008), Mac OS X (10.7.3)
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Nov 24, 2007
I run a dual 2 GHz G5 PPC (OS 10.4.10) - for the past 4-5 months I've been getting freeze ups for no apparent reason. These nearly always happen around the same time in the evening (around 11 pm) - although not every evening - probably 2/3 times a week. They can happen whether there is any activity on the computer or not. There is never anything on the console log at the time of the freeze up. I'm putting off an archive and install - though I've tried everything else - Disk First aid, Disk Warrior, permissions, fsck, cache cleaning, font checking, Memcheck, re-booting in safe mode, re-applying combo update, resetting the PRAM etc. - I've even tried replacing my secondary hard drive. I've also tried watching the Activity monitor around the problem time - unfortunately this is when it decides not to happen.
The Mac appears to run ok during the day (usually on by 7.30am) One other slightly odd thing is that sometimes at boot up a warning screen will appear and vanish in a 'nanosecond' - I think it could be the device removal warning -though nothing apart from my two internal drives may be connected. I also get this in the start up log 'family specific matching fails' on a number of usb items. Hope someone can help I'm running out of ideas.
Information:
G5 Dual 2 Ghz PowerPC
Mac OS X (10.4.10)
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Oct 26, 2008
I have a G5 that has started intermittently booting up with a totally blank screen - not blue, no video at all. Sometimes on reboot or after resetting the PRAM it works again.
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Jan 7, 2008
My G3 b&w tower seems to have an intermittent problem with booting - every few times I go to boot there is no power. I have tried it with different power cord/socket etc but it seems to make no difference. Any ideas what this could be?
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May 28, 2009
My Internet connection periodically stops. Email access stops, web pages stop, etc. Other comps on my network don't have the issue. It's not all the time, but it is every day. I haven't tested with a new test account, because I simply don't have the down time, but I would love some diagnostic tool or technique that will allow me to continue working and test when the connection goes down...
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Nov 11, 2010
I have a 2008 MacBook running Mac OSX and it loses wireless internet connectivity on a continuous intermittent basis. I use a Linksys router and none of my wireless PC's are effected by any loss of connectivity when my Mac is, in fact, they do not lose connection to the internet at all. I am connected to my own secure network that is wep password protected.
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Mar 31, 2012
The last days appeared a problem on my IMac 21,5 inch Mid 2010, OSX 10.7.3. Without notice an intermittent sound appears very loud and the imac freezes. I have to re-initialize the machine. I've checked the console log and nothing.
Info:
iMac, Mac OS X (10.7.3)
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Jun 13, 2012
I recently purchased a new MINI (2.3, i5, 2GB RAM) and I am totally disappointed with the performance. Specifically, I am fed up with the terrible audio stability. I have a MOTU Ultralite MK3 Hybrid and generally use the Firewire interface, but this problem also happens when I'm just using the internal audio. I've never experienced this before on any of the MINIs I've had (this is my third) nor on my old G4. Now, on what should be the best of the lot, I can hardly stand to listen to anything while trying to do anything else on the computer. Even simple things like opening a JPG in Preview causes the audio to cut out when the file is being opened. Virtually every move interferes with the audio and causes a dropout. It is worst of all when using any kind of browser and trying to have a YouTube video play in the background while surfing on another tab. I used ot be able to do this all the time without dropouts on my last Mini, but this thing seems to have a serious CPU bottle neck and I don't know where to even begin to try to find out what's going on. I'm really heart broken by this because I am not working and spent money I can't afford to replace my last computer and now I'm stuck with this junky thing that can't even play an MP3 and open a JPG at the same time. It's like the whole process of dealing with multiple threads has been trashed somehow. What happened with these new MINIs? Am I the only person having this problem? Why can't my computer deal with ANY kind of multitasking without crapping out on the audio? It shouldn't be like this. It wasn't like this before. Â
Info:
Mac mini, Mac OS X (10.7.4)
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Jun 26, 2012
Recent update was midweek of June 17-23. Have been having constant issue with connecting to the Internet. I have to stop the airport then restart airport and wait a minute then it's working fine for like 5 minutes. It is unbearable! I get an exclamation on the airport icon in the menu bar. I have to repeat steps again, over and over and over.
Info:
Mac mini (Mid 2010)
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Dec 20, 2007
I have an early 05 PowerMac Dual 2.3 machine that's making some intermittent clicking noises over the last few months. There's no pattern - sometimes it happens every few minutes, sometimes it won't happen for hours. The clicking sound is loud - and is accompanied by, what I can only describe as, a bit of a buzz sound. At first I thought it could be my HDD or superdrive, but I think the click is way too loud. Now the question - is this my power supply getting ready to give? The machine does not fall in the range of the power supply repair program. I'm already in the process of adding a second HDD to clone my main drive just in case.
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