PowerPC :: Mac G5 Shutting Down - Overheating?
Nov 27, 2010
I've got an early 2005 model Power Mac G5. Bought it from a hospital and it's really clean inside. Lately it's been shutting down spontaneously without warning. I thought it might be an issue with overheating, but I'm not that familiar with normal heat levels for a CPU. I installed iStat nano and checked the temperatures. I took a screen shot of the widget. Temperatures are in Fahrenheit. Can anyone tell me if I'm on the right track? What do I need to do to solve this problem?
Power Mac G5 (early 2005)
PowerPC G5
Dual 2.3GHz
2 GB DDR SDRAM
Model Number:A1047
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Dec 31, 2010
I don't know if it is a fan or a drive that starts up and runs really fast and loud, then the computer shuts off. I always thought it was the fan, but now am not sure. I have moved it to a place where it is exposed to more air, but that has not seemed to help. Does anyone have an idea or solution to this problem? The nearest Mac dealer is about 80 miles away, so if I can fix this on my own, I would like to try.
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Sep 7, 2010
over the past few weeks my blackbook has been shutting down more and more frequently from what I can only believe is overheating. I just checked my computer upon startup with SMC fan control - it starts up at about 70 C and at about 3500 RPM. Yet, after a few minutes, the fan immediately drops down to 1100 RPM or and fluctuates between 800-1400. I try to force the fans to spin with SMC Fan control, but nothing happens. I've looked all over the web and I can't find anything definitive. I know that macbooks tend to overheat. What can I do?
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Jul 28, 2008
I'v just noticed, after installing iStat menus, two different CPU usage measurement graphs. Core 2 duo, so apparently one for each core or chipset, whatever . But the weird thing is, that sometimes, while watching movies, burning dvd etc. (sample "high usage" situation), when the CPU temp. goes around 60 celc. and fan spins at 6200 rpm, one of the "core graphs" shows nothing, like the core is shutting down (screen attached). It's annoying, because the whole system slows down, I can't do anything, and after like 5 mins it gets back to normal (after closing for example the movie). Any solution for this or should I just get used to it?
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Apr 24, 2009
i can't watch videos online like the daily show with john stewart. the fans start going full blast-- up to 6000 rpm-- my main CPU goes up to 120 degrees. then the computer shuts down. any idea why it does this? happens when i work in photoshop sometimes too.
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Jan 14, 2010
I've googled to see if I can find a solution to this but not had any luck - wonder if you could help. My Mac Mini is 1.5Ghz PowerPc G4, 512Mb RAM, running Mac OS X Version 10.5.8. I bought it second hand a couple of years ago and in the past while it's really been playing up a bit. It first started overheating and shutting down when I was doing really resource intensive stuff - for example, opening a large amount of RAW image files. However, it's now started taking to shutting down when I'm doing normal browsing, using Spotify etc The machine also tends to hang a lot, and I can't really stream videos very well either. The vents at the back of the Mac definitely aren't blocked and there's plenty of space around the machine to let the air circulate.
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Feb 11, 2010
My Macbook is 1.5 years old (13in, white, 2 GHz). About two weeks ago, it would randomly shut off. It would restart fine, but shut off sooner. Sometimes, it wouldn't even restart. Now, it's at the point where when I power it on, it rarely restarts past the white apple start-up screen.
My thought is that it is overheating. Are there any more ideas? What can I do to save my macbook?
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Sep 7, 2010
Over the past few weeks my blackbook has been shutting down more and more frequently from what I can only believe is overheating. I just checked my computer upon startup with SMC fan control - it starts up at about 70 C and at about 3500 RPM. Yet, after a few minutes, the fan immediately drops down to 1100 RPM or and fluctuates between 800-1400. I try to force the fans to spin with SMC Fan control, but nothing happens. I've looked all over the web and I can't find anything definitive. I know that macbooks tend to overheat. What can I do? I'm at college and I really need to find a fix for this as soon as possible.
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Jul 5, 2012
My Macbook's been overheating and shutting itself down the past two days, usually when on YouTube. Having installed the Fan Control system preference, I can see the fans aren't running at all. My first thought is that they might be broken, but this happened for a little while last year, too, and the fans started working again after a while. Also, it's been miserably hot in my area the past week, and I wonder if that's contributed to it, too (even though the laptop's in an air-conditioned room). Anyway, should I wait and see if the fans begin working again, take it to a repair shop (warranty's expired, so I'm not keen on that), or maybe buy a cooler pad?
Info:
MacBook, Mac OS X (10.5.8)
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Oct 14, 2008
I have a G5 2.7ghz powermac. Recently it began switching itself off at start up. If it did boot up - it would only last for a few minutes that it would freeze.
I clean out the dust from the inside and even took the cpu cover off - none of it has made any difference. I have also replaced the lithium battery. Has anybody else experience this?
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Oct 1, 2009
I have a new macbook, see stats below.
Up till last week everything was fine, I could run 'Second Life', photoshop, email, a browser, download stuff, play Itunes AND watch a movie all at once without any trouble.
But recently the computer has gone a bit weird.
It started getting very hot, much slower and turning itself off.
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Aug 9, 2007
Yesterday a friend gave me a really nice 17" iMac G4 he was planning to throw out because it was having problems. I would really like to get this working and would potentially be willing to buy parts to repair it. I have a significant amount of Apple hardware experience, but would like to get the opinions of people who may be more familiar with iMacs than myself on these forums. The problem is that the computer has random kernel panics. Sometimes it occurs as soon as the computer is turned on, sometimes after it has been on for a few minutes, sometimes after a few hours. So far, I have replaced the RAM with known good sticks, have replaced the hard drive with a tested good one from my collection (and these were both upgrades to boot!) and I have re-applied thermal paste (Arctic Silver) to all key components (CPU, ends of heatpipe, GPU) but to no avail, I still have the same problem.
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Apr 3, 2010
I have an iMac G5 that is starting up, then working okay for 1-2 minutes. After that, the processor usage goes way up, and the fans start spinning loudly. It's a first generation 1.8 GHz with a 17" display. Mac OS X Leopard. Recently, it spun up and then shut down and wouldn't start again. The room it's in is < 75 degrees F. No malodor, or other symptoms save for hot to the touch. Has been left shut off and unplugged for a few hours, and still has this problem.
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Nov 22, 2010
I had my iBook G4 a few years ago, and since I was about eleven when I had it, I'm not sure I always took the best care of it, but it's always worked pretty much fine up until about a week ago. It's started shutting down randomly. It also sometimes randomly goes to sleep in the middle of things. In particular, it doesn't seem to like starting up, or the internet, especially if I'm on youtube. I've tried a PMU reset, as it worked once before when my laptop wouldn't start up, but it hasn't worked properly. It's worked from anywhere from a minute from the time I start up again, to about a day or two at most, but it always seems to shut down again.
I really don't know what else to do with it... and I don't understand how computers work at all.
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Apr 1, 2007
I have a iMac G5 (Pre-iSight). I just got home and my computer was off, I didn't turn it off and I asked my mom, she said she didn't come into my room. I was posting something on here and my computer shut off on its own. What gives?
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Feb 2, 2009
I have a refurbished iMac G5 that randomly just shuts off. It makes a little "zzzttt" sound, like something is short circuiting and then dies. Sometimes I can power it right back on and sometimes I have to unplug it and wait a few hours before it will come back on. While it's running, there are no issues. It functions beautifully. Anyone else had this type of problem or can you suggest a solution? Here's the info on it:
Mac OSX 10.4.1,
Machine Name:iMac G5
Machine Model:PowerMac8,1
CPU Type:PowerPC G5 (3.0)
Number Of CPUs:1
CPU Speed:1.8 GHz
L2 Cache (per CPU):512 KB
Memory:1 GB
Bus Speed:600 MHz
Boot ROM Version:5.2.2f4
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Jan 10, 2006
if anyone with the latest 15" DL DVD Al Powerbook has had it shut down unexpectedly? I'll just be doing something (checking email, surfing web etc) and it'll just turn off no warning, no "shutting down" message, no low battery warning, nada. just dies. I'll be able to reboot using the power button straight away (even using battery, so it's not a low battery charge problem) and it works normally again, but has to do the full reboot sequence. It's a bit spooky really. i'll be happily going along and suddenly nothing. Problem is, it'll only happen after i've had it running for a few days (i just shut the lid after i'm done with it) so it would be very hard to prove to Apple. Anyone else has had this happen?
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Sep 2, 2007
a close friend has a 20' iMac g5. the Computer now shuts downs sporadically and she says it gets a lot hotter any idea what's wrong?
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Sep 18, 2007
My iBook (about 3 years old) all the sudden started continuously restarting. The screen would dim and a black window would appear saying that the computer needs to be restarted with a picture of the power button symbol behind it. I have done that and now the same thing keeps happening every time my computer turns back on. It has happened 4 times in the last 20 minutes. One time as soon as it restarted, it shut itself off as soon as the desktop appeared. Does anyone know what this means?
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Dec 1, 2009
I have a ibook G4 and its quite old, four and a half years old I think. I've had no trouble with it so far, but recently it shut itself off (it happened twice) and I have to let it rest a while before I can turn it on again. I got a new battery over the summer, but apart from that I've done nothing different. Is this the beginning of the end for my laptop? Is there anything I can do?
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Feb 24, 2010
Its been a while since i've looked into this after i first realized that the speakers attached to my G5 PM didnt shut off when i plugged in headphones. Has there ever been any type of software fix for this? And while we're at it, was this issue resolved in Mac Pros?
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Sep 21, 2007
My friends iMac G5 just recently has been randomly shutting down. Does anyone know anything I can do to him fix his computer?
I checked [URL] and there seems to be issues with power on some models, but his serial number just misses the infected batch.
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Feb 5, 2008
I looked into my issue a little but recently my IMac G5 started randomly shutting down when left unused for a bit but that seems to have stopped as far as I have noted. Now occasionally when it goes into sleep mode it will freeze on the black screen and the fan will go crazy. I plan on buying a MBP, if the update ever comes out, and then ill just completely wipe the IMac and give it to my parents, who still use the original I mac, G3 or something. I read a certain series of I Macs were having motherboard problems, W950 or something, but mine wasn't that serial code.
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Dec 11, 2006
I'm trying to zero the data on an iBook hard drive before selling it. When I connect it to my Powermac via firewire in Target Disk Mode, it shuts down completely about 30 minutes into the proceedure (and yes, the power adapter is connected).
This has now happened 3 times in a row.
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Mar 23, 2010
I have a MacBook which has recently been shutting down when it feels like :/ this all started a week or two ago (well not the shut downs but other issues that I'll get too), basically the fan I think has been knocked as it is bumping the top or something as the whirring is getting loud and it sounds like every now and again it hits something
Also CPU usage seems to be averaging out at 20% for Safari and 100% for HD Video where as it used to be very small amount for Safari and 30 - 40% for HD.
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Jul 14, 2009
So whenever i am done using my book, i close it up and leave. when i come back to it the fans are on full blast and my laptop is hot. i open it up and its a black screen and you have no control. i have to hard shut down the macbook and restart it. It also does this when i put it in sleep mode and then leave. anybody have any thoughts.
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Apr 2, 2010
Before I start, here are my late-08 MBP stats:
2.5GHz C2D
4GB RAM
512MB 8600 GT
OK, with those relevant stats out of the way, my MBP will usually sit anywhere from 120-125 F just browsing with iTunes playing in the background, Mail open and maybe Parallels. However, I after letting my sister use my computer and her going on Farmville in Facebook, I noticed it was running up around 140-150 and a couple times reached 160-163 (these numbers are via two different temp apps).
When I looked, there were 3 flash programs going on...two pop-ups for a seedy cam site and Farmville. Closed the two pop-ups and the temps dropped back to 147-150. Once Farmville was closed, temps went back to normal. My question is it normal for flash applications to make the laptop run so hot? Is there some sort of update I might need?
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Jun 29, 2010
I tried to install a larger hard drive in my mac mini pps version. Everything seems to be alright but after a few miniutes the computer gets hot on right side and then it shuts off .I have shut it down and wait untill I hear from you
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Aug 30, 2010
so ive been hearing around the tubes that the macbook pro i7 and i5 have been over heating...
has the issue been fixed? if not does it overheat less on thev i5 then the i7? or are they about the same?
im thinking of getting a mbp 15" i7 as an alt comp to accompany me when i cant use my quad core pc. so ill mainly use the laptop on my lap and such and i dont want it over heating while on me.
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Sep 18, 2010
I'm using my MacBook for a wedding slideshow that will run on continuous loop for about 4-5 hours. I am a little concerned about overheating from running so long. What can I do to prevent overheating? I thought of The SMC fan control app, but don't know what the settings should be..
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