21.5 iMac i3 3.06 fan noise

Hello all. I am a longtime Mac user (going back to the first LCD iMac.
Anyway... I ordered the new base iMac and noted that it's fan was on all of the time and was quite loud. It always felt very cool to the touch. I assumed that was just the new reality with the intel processors (my last mac was a 1.5 gig g4 powerbook 12).
I ended up exchanging that computer with a new one since it had the yellowed screen (bottom right).
Anyway... the screen on my new iMac is great... but now the computer is dead silent. The back is pretty darn hot too.
Just wondering what the norms are? Most temps are in the 50's... and the GPU is in the low 60's.

Hello, I think it could be two things: one, the fans are very revolutionized or there's a problem with the GPU fan and the HD cable. I'll explain: My iMac was very noisy, I called Apple and they said me that I have to give the computer where I bought to change it. And the problem was that the HD cable wasn't in their place, and it was touching the GPU fan.
PD: Do you try to reset SMC? (http://support.apple.com/kb/ht3964)
BYe

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Miriam,
Maybe I was a little premature. I just went to abc.com to watch the last episode of Men in Trees and here's the results.
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Didn't seem to be a high bandwidth download as net was clicking at 117 Kb/sec.
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I have also had problems with a sound, more like a high pitched noise. I have had the fans replaced and a new mother board put in by Apple. (I have Apple Care and they have been great.) I had the computer down to a genius bar twice. The second time they did a re install for me. It seemed to fix things for about a week. I'm back to the noise being louder. (It wasn't like this when I first purchased the computer in Dec. 2004) This has all started in the past couple of months. Now I am back to the fans going full blast.(Just reading mail will start it going.) I put the computer to sleep, it stops. When I wake it up, it starts all over. I have to shut it down for a few minutes and then start up again. That solves the problem. The noise gets so bad it can be heard throughout my home. It's getting annoying. My next step is to ask Apple to replace my computer with the latest one that has come out. I'm still sold on the Mac and love it. I'm trying to maintain a positive attitude about getting it fixed.

IMac G5 bootup with fan noise but no display

Hi all the experts out there,
I'm new to iMac and need help to resolve the following issues:
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My iMac monitor is making a "fan" noise. What is it and what do I do to shut it off?

Fans run to stablize temperatures on your iMac. The fans cannot be turned off.
If you think the fans run excessively, try Resetting the System Management Controller (SMC)

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Hello pinster
Reset the SMC > http://support.apple.com/kb/HT3964
+1. Shut down the computer.+
+2. Unplug the computer's power cord.+
+3. Press and hold the power button for 5 seconds.+
+4. Release the power button.+
+5. Attach the computers power cable.+
+6. Press the power button to turn on the computer.+
Dennis

My iMac makes louder whirring fan noises and gets really hot.

Should I go to the service center and have it checked out?

Before you do, do a SMC reset and download and install iStat Pro (Google it) and post the actual temps.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

IBook or iMac? Fan noise?

Hey, I am thinking about getting either an iBook or an iMac.
I have read that the iMacs make allot of fan noise? Is this so? That might be a problem, as I will be using it for recording guitar and vocals quite often.
Anyone here use an iMac to record stuff in garageband?
Cheers
see ya

my G5 iMac sits in the only room in my house that does not have AC and even with the processor averaging about 165*F I barely hear anything over a purr. the room is a sun room, and I live in Santee, California, which isn't exactly cool during the day if you know what I mean. the SuperDrive is the biggest improvement, even though it is audible during use, my old G4 used to sound like it was trying to take off like a turbofan engine. while the heat of the thing scares me a little, I feel confident that it can handle it. I've not really tried to max it out, but in a room that averages 85+ degrees during the day she's holding up well I never used my G4 to record in garage band, but I've made simple techno songs, just by clicking with the mouse, and adjusting things, it took for-freakin-ever to do it that way, so I will be getting better equipment now that the new imac can handle things better.

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but my real question here is what temp should the imac g5 (1.8ghz) run at? at idle my CPU usually sits at about 155, under load about 165-170. this is acceptable right?
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Hi Eric, you might get more help posting in the G5 forum. This forum is for the iMac Intel Core Duo.

IMac i7 - Strange CPU-fan problem!

Hi,
my name is Chris and I'm living in Germany. Sorry for my pigeon english, I'm not very good in languages... Nevertheless I will try to describe my problem.
I have received my iMac last saturday. It's an i7 with 2TB hard drive. On sunday suddenly the CPU-fan went nuts, spinning with about 3500 rpm. At that time there was no heavy CPU load at all.
Neither P-RAM- nor SMC-resets fixed the problem, the CPU-fan was running at full speed all the time. On monday morning (the i7 was switched during the night), the problem was still persisting. Hence, I contacted Apple and they promised to send me a replacement for the i7 in about three weeks.
Later on this monday, I received a package with additional 4GB of memory I had ordered for the iMac. Although the iMac was making noise comparable to a 747, I decided to build in the additional 4GB of RAM, just to play a bit around with an "8GB machine". The assembly of the additional memory was pretty easy, basically everything was working fine (memory wise). But the CPU-fan was still continuously at around 3500 rpm.
Afterwards, I decided to clean up the computer a bit by using the "automatic" script within "Onyx". I started the procedure and left the room.
When I came back about 1 hour later, there was total silence in the room. In first instance I wasn't surprised very much, because the iMac was obviously in the sleep mode. But I was really surprised when I woke it up again: The CPU- fan was back to normal, spinning with 940rpm. Almost completely silent.
Any ideas what happened? Can there be a connection between the "fan-went-nuts-issue" and the Onyx scripts?
What shall I do? My iMac is behaving now, but I have already ordered replacement...
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Yes, I have seen this thread, thank you.
When the CPU-fan started to spin at 3800, one of the first thing I tried was putting the iMac into the sleep mode. After I had done so, I woke it up back again almost immediately (about 1 minute later) by pressing the space bar. But for some reason, the iMac woke (with normal fan noise) and then immediately fall back into sleep (after being about 10 seconds awake). A "proper wake up" was not possible, since it was sort of an infinitely loop of waking up and falling asleep. A reboot via the power button was necessary, whereby the fan went back to 3800 rpm.
And then I performed this Onyx-run (as mentioned in my first post), and afterwards the iMac went to sleep mode automatically. It stayed in the sleep mode for about an hour or so, and after my next wake up call it was cured.
Really strange. Either it was cured by the maintenance-things Onyx did to the cache/system files, or by being in the sleep mode for about one hour. I also can't exclude influence of our Lord, since I was behaving in the last year...
Somehow I have lost my trust in that machine. Even after the fan went back to normal behavior I am still not sure if I should cancel the replacement order... I am open for recommendations from your side.
Best wishes,
Chris

TA25225 Display Flickers in my 21" Imac Intel. This happened after the fan noise in my machine. I also reported the problem and gave to the service centre, but the problem still persist. Please help. I purchased it 3 - 4 weeks ago

Hello,
I purchased my imac intel 21" 3-4 weeks ago and in the 2nd week i faced an issue with the machine. When i switched on in, there was a fan noise and a white screen. The machine had hanged. I reported the problem and gave to the service centre. After testing for a week, they said that there is no problem with the imac. Again i faced the same problem after receiving it from the service centre. They again tested the machine for 3-4 days and reported as no problem with the machine. Couple of days back, I received the machine from the service centre, and on the same day when i switched it on, there are flickers in the display. Please help me solve the issue. I am from India. The service here is very bad.
Hope for a resolution
Thanks

Hello RedDevil07
Yes I agree with seventy one. It's common sense to do this, especially now. I would also contact AppleCare and report this issue with them, it will get documented and you will have a caseID that you can refer to when talking to them in the future should this issue go one.
Be polite with AppleCare and your AASP. Hopefully everyone is being honest and trying to help you and not what might appear to be the opposite.
Patience is a virtue, but I thoroughly understand your frustration.
Let us know how it goes, we are here to help in whatever way we can.
I encourage you to contact AppleCare to report this experience and get their recommendations. There is an expectation that you should have that AppleCare is there to help you as a customer. I am sure they will too!

IMac g5 fan noise with update to 10.4.11

Has anyone else experienced this?
I have never had any problems with fan noise with my iMac, though I know it's a problem, till the recent update to 10.4.11. After restarting, it sounded like an airplane. Never heard that before. I shut it down and restarted, and it doesn't sound like a plane anymore, but the fan is noticeably noisier than ever before, a constant whine/hum.
Besides the energy saver fix and resetting the SMU and canned gas in the vents, any other suggestions? This is annoying, it's been running pretty perfect for three years till this. Thanks.

The questions are certainly not dumb - almost anywhere is cheaper than Apple for RAM, I recommend [macsales.com] and [smalldog.com] or [newegg.com]. I don't think that going back to 10.4.10 will help, you should really vacuum the vents to get dust out, and make sure that there's nothing hogging your CPU and making the fans noisy, look at Applications>Utilities>Activity Monitor to see if anything is using an unusual amount of memory or CPU.
If you do want to install Leopard, I would suggest making a full backup of your system,I use SuperDuper! to clone my system to a firewire external drive. You should certainly upgrade your RAM if you install Leo, but I don't think your machine will be any quieter with a new OS.
You need to remember that your machine is several years old, and that things get creaky with age (I certainly have). Since you have the iSight, it's not a simple matter to open it and clean the fans off. If you are really disturbed by the noise, you can take it in to an Apple service place and have them clean and oil the fans, which should help enormously.
Sorry I couldn't offer more help, but fans will, and do, get noisy.

IMac Fan Noise - Not The Usual Problem

Hi,
I have seen plenty of discussions on iMac fan noise but mine is a little different. A week ago, a 'tink' noise (similar to tapping your fingernail on a glass) started coming from my mid 2011 iMac. At first, I thought it was the "click of death" for my hard drive, so I replaced it myself. This didn't fix the noise, so I ran an extended hardware test. This came back with a 4MEM error. I had some spare RAM, fitted it, ran the test again, no 4MEM error.
So, I booted the iMac again. 'Tink'... 'tink'. I finally located it to the bottom right of my iMac, where the optical drive fan is located. This fan has always rattled a little now and again but now it seems intent on driving me round the bend with its very own form of torture. At first, the 'tink' was now and again, but now it constant. 'tinktinktinktinktink'. Is there a way to stop the optical fan for now? I don't use the optical drive often anyway. Or would it just be a replacement fan?
Resetting SMC or PRAM does nothing.

This may be way off target, in which case ignore me. Do you have an app called Free Memory installed? There have been a few posts on here where it seems to cause repetitive odd noises to occur, particularly when running Mavericks?

Again imac 309rs/a fan noise

Hello!
problem with fans again
After hanging my imac - fan began to publish a crackling sound. that this could be?
few image's of istat
here look's like all right
and here:
imac didnt hanging again, but noise crash my mind
so what i try to do:
reset SMC (cmd+opt+r+s)
have on idea, about what i need to do now
or it's question for service? (actualy its very sad - imac work just around 4 months)

This could be a completely different issue, but occasionally I've encountered loud fan noise from my iMac. It's not a crackling sound, though, just a loud fan. Anyway, the fix for me is to unplug the power cord from the back of the computer then plug it in again. The fan noise disappears. Not sure this applies to your problem but it's worth a try.

IMac G5 fan noise

Hi MGW,
Baby Boomer recommended that I check with you about our iMac G5 fan noise since you used to have the same model. For a reference as to what all has been suggested and done go to: http://discussions.apple.com/thread.jspa?messageID=9810894&#9810894
I've done some internet searches and come across some other ideas on what may be the problem and if it is not too much trouble I would be very interested in your thoughts about the suggestions by DeathStalker13 --- please scroll down to #19 at this link:
http://forums.macosxhints.com/showthread.php?t=50158
Here is another link that I've found information about iMac G5 fan noise. I'd also like your impression about the methods that these people have done to solve the issue:
http://scienceman.com/legacypgs/00imacG5fanforum.html
I've also contacted a local AASP store and from just our telephone conversation they think just cleaning the fans and inspecting the computer which would take 1-1/2 hours at $95/hour should take care of the problem.
We'd really appreciate you opinion. Thanks!!!

Thank you so much for answering so quickly. I apologize for not being able to do the same. We had unexpected house guests and everything else was set aside while they were here.
This morning I have been researching trying to figure out how to disable Flash but so far I've been unsuccessful. We have a Power PC Mac OS X 10.4.11, Safari version 3.2.1.
Under the Safari "Help" it says, "Safari works with the plug-ins that are installed with Mac OS X. To see a list of installed plug-ins, open Safari and choose Help > Installed Plug-ins."
I checked and the Installed Plug-Ins list only has one "FLASH" listed - Shockwave Flash. I didn't know how to disable it or if I should.
You suggested changing to Firefox or Camino. We already swap between Safari & Firefox (version 3.0.12) for other reasons. Unfortunately, the fan noise is the same whether we use Firefox or Safari.
It was interesting that under Firefox "Help" they recommended disabling Adobe Flash plugin: http://support.mozilla.com/en-US/kb/Usingthe+Flash+Plugin+withFirefox?style_mode=inproduct
They said something about, "vulnerable to an extremely malicious exploit" and that until Adobe has an update, you can disable Flash. I followed the instructions but the only plug-ins I found were the following:
Default Plug-In
Netscape Navigator Default Plug-In
Java Embedding Plugin 0.9.6.4
Runs Java applets using the latest installed version of Java. For more information: Java Embedding Plugin. Run version test: Java information.
Java Plug-in
Java 1.3.1 Plug-in
Java Plug-In (CFM)
Java 1.3.1 Plug-in (CFM)
QuickTime Plug-in 7.6.2
The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime web site.
Shockwave Flash
Shockwave Flash 9.0 r159
Shockwave for Director
Macromedia Shockwave for Director Netscape plug-in, version 10.1.1
I haven't changed anything yet, as I'm not sure what I should disable. We have considered putting up with the fan noise since it isn't as bad since we cleaned the fans but if there is an easy fix we'd really appreciate your advice. Thanks!

21.5 iMac i3 3.06 fan noise

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