Start fan noise suddenly

Suddenly a couple of days ago a persistent nosise is coming from my notebook, probably is the fan, right side, is this normal? What I can do?
fsr
MacBook Pro 15 Mac OS X (10.4.9)

Hey, have you recently updated your SMC Firmware? If so, this might have caused your fans to spin faster and more often, which is good for it cools down your computer more! If this is not the case, you might have a problematic fan EVEN IF YOUR HARDWARE DIAGNOSTIC TEST SHOWS NO ERRORS. This happened to me and they ended up replacing both fans. I would call Apple Care if you do not believe it is related to an SMC update.
-Leeron

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MDD G4 fan noise - suddenly

After a year or so of random, intermittent hangs and freezes and the occasional kernel panic on my DP 1.25GHz MDD G4, I have finally identified the culprit. My built-in FireWire 400 ports had been a bit flaky at times but now don't work at all. When starting in single-user mode (Cmd-S at startup) the following message would be displayed: "FWOHCI Error trying to clear PHY ports". After a lot of the normal software "fixes", such as resetting the PMU, resetting the PRAM, Open Firmware commands (reset-NVRAM, set-defaults, reset-all) at startup, Disk Utility verify/repair, etc., and even disabling then re-enabling the FireWire "extension" using Terminal, I am sure my diagnosis is correct. This was verified by checking the connectivity of external FireWire drives by using a "Combo" USB2/Firewire PCI card against the non-connectivity using the built-in FireWire ports. Definitely, the built-in ports are dead. Disk Utility would show nothing, and when opening up System profiler and selecting FireWire, most of the time System Profiler would crash.
Sometime ago I had purchased the same model (but in the single-processor configuration) as a "spare" in case my main one encountered problems. After checking the motherboards and making sure they had the same part number, I decided to swap the motherboards over. The dual-processor daughterboard connection to the motherboard is the same for both configurations, and the change-over was successful - the computer works as it did and I have Firewire back. Yay!
Up until the computer was "shut down improperly" (someone turned off the wrong power switch on the wall, causing sudden loss of power to the computer), it was going with no problems - probably about three hours of normal use. On restarting after this incident, the fans now run at a consistently high speed much faster (and louder) than before. I have tried all the above-mentioned software "tricks", but to no avail. I have run Applejack and I have checked the Firmware version - it is up to date (4.4.8f2). I even suspected a possible lessening of the amount of thermal grease between the processors and the heat sink during the changeover, but the fans had been working normally before the power-off incident. The ambient temperature is normal room temperature, possibly even slightly on the cool side. The fan "ramps up" to high speed (possibly full speed) about 15-20 seconds after pressing the on button and then stays at that speed with no variation.
Is there anything in these computers which acts as a thermostat and might possibly have been affected by the sudden loss of power. The power supply itself is good and I have had no problems with it. I do have a spare, as well as the one in the "spare" MDD, although I am reluctant to swap over the power supply as it is a fiddly job in confined spaces with many sharp edges to cut one's fingers on.
As mentioned earlier, everything (including fan operation) had been normal up until the power "went off". After that, the fan speed has been high all the time. Does anybody have any ideas as to what is going on and other things I might try?

Success - but not complete!
After cleaning off all the old thermal grease from the CPUs and the heatsink and applying a sufficient amount of new high-quality grease, there was no difference in the fan speed.
I put in the original motherboard (with the non-working FireWire ports), and the fans returned to operating as they should (ie at a speed proportional to the temperature). There was, however, a temperature increase reported by Temperature Monitor, most likely because of the slower air movement.
I found yet another motherboard which I had acquired in a non-working MDD G4 (dead power supply, dead hard drive, and a capacitor needing to be soldered back onto the motherboard, but the case was fine!), and tried it out. It has working FireWire ports and normal fan speed, but gives no sound through the front speaker. The front headphone socket and the rear headphone/speaker socket work, at least, although the extra socket for the Apple Pro Speakers appears to also be non-functional.
I have decided to stay with this motherboard for the time being as FireWire and quiet fans fall into the "must-have" category more than sound from the front speaker (which is mono after all - with a pair of Logitech speakers in either the front or rear headphone socket I can have glorious stereo).
To summarize the three motherboards:
1). The original: proper fan control, but non-functional FireWire ports;
2). First spare: functioning FireWire ports, but fans run (loudly) at full speed all the time;
3). Second spare: functioning FireWire ports, proper fan control but no sound through the front speaker.
The temperature readings with the "second spare" motherboard are:
37-38°C, 32-33°C and 29-30°C for the three drives (of the four) that it reports on, with this motherboard also giving a CPU temperature of 51-53°C (the others only gave readings for the drives). I don't know if these temperatures are "good" or a little on the high side, but the computer is working normally (apart from the front speaker), and the fan noise is mild/normal/acceptable rather than annoyingly loud.
I will probably investigate purchasing another, fully-functioning, motherboard, but the risk of faults is always present with older secondhand gear. Also, I would still like to work out what caused the fan-speed controller components to malfunction. I have had numerous incidents like this before - power outages, forced restarts by holding down the power button (after a kernel panic), etc. - but never had a hardware problem caused by the sudden loss of power. Maybe, in simple terms, its time was up.

X200 is suddenly emitting a loud fan noise

My X200 has been working perfectly since October. Now, almost a year later, it suddenly started to emit a loud fan noise (almost as if something fell inside the fan, although nothing did). Has anyone experienced fan failure on the X200? How can I get it fixed? I'm on a long trip in Europe and need to use it on daily basis. It's quite embarrasing to turn the machine on in public places.

heretohelp - if WaleedBakr's system is under warranty then of course it would be covered.   no one is claiming otherwise or denying him of service.
regarding Lenovo knowing "exactly what is wrong with [his] computer", that depends entirely if a call has been made to service.   it sounds like the issue may have cleared itself and that a service case hasn't been opened.
regarding this post going so long without a response from a technician, this thread was started on a saturday (in the US) and our forum doesn't have technicians roaming around.   this is a peer-to-peer forum, not an official support channel.
i recommend familiarizing yourself with our community participation rules where we outline the objectives of this forum and rules of conduct.
if you have personal experience with this same issue happening on multiple X200 systems then i suggest posting about it in this thread so the information can be logged.   that would be very helpful.
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Macbook pro retina start to make loud fan noise and work slow

I bought macbook pro retina display less than one years ago. For some reason my macbook pro has been making loud fan noise for about five mounth. Whenever macbook pro makes the noise, all the programs start to run slow. Typing, opening safari, and etc takes forever. It takes 20min to 40min for the noise to stop. At first, the macbook pro made noise once or twice in a day, but now it's making the noise frequently; It happens every 2-3 hours. It got to the point where it start to annoying me. Is there a way for me to fix this issue? If not, can I use one year warrenty to fix this problem? Thank you.

If your Mac works slowly when fans turn on, it's quite possible that there's a process which is eating the CPU and/or RAM.
Open Activity Monitor (in /Applications/Utilities), select "All Processes" above "Show" (in the toolbar) and then, order the processes by CPU usage. Do you see any process which is consuming more CPU or RAM? If so, tell us the name.
Additionally, you can reset the SMC > http://support.apple.com/kb/HT3964

My new Imac 24", 2.8GHz Intel Core is suddenly making a loud fan noise

Please help!
This Imac is only a week old. I bought it on apple online store. This is 24" 2.8GHz Imac and it's been the best computer I've ever had. It was wonderful to work and silent until yesterday. And suddenly I can't stand the fan noise coming from my new Imac. I downloaded i-stat Pro to check the status of my computer and it reads *CPU fan:1198rpm, hard drive:1198rpm, optical drive: 4401rpm*
what is wrong with my computer?
I searched many mac forums, and I've tried many things including shutting it down and unplugging everything and replugging everything after a while, but nothing solves this problem. Does anybody have experienced this problem? I am not even using many applications. I am only using safari, and the fan is at full speed. SO LOUD! What can I do to solve this? Should I take it to apple to look at it?

Hello lovingimac
Welcome to Apple Discussions
That sounds like there is something wrong with the temp. sensor for the optical drive.
If carefully following the SMC reset instructions below, does not fix the fan issue:
http://docs.info.apple.com/article.html?artnum=303446-en
Then yes you need to make a trip to your local Apple service center.
Dennis

IBook suddenly started making noise

Hello!
My iBook G3 suddenly started making noise. When you dont do anything on it, its quiet, but when you open apps, write stuff to disk, its loud. How can I avoid this?
Matt

It sounds like you may be having some hard drive issues.
Try booting into Safe Mode. This will take quite awhile longer than a normal startup because it does a file check and repair of the hard disk.
You will see your normal desktop. Once completely started up in Safe Mode, restart normally, and go to Applications > Utilities > Disk Utility. Click on the top hard drive icon in the left sidebar and note the S.M.A.R.T. status at the bottom right of the pane. What does it say? If it says "Verified," you should be in good shape, as far as the hard drive is concerned, at least.
Select the named boot volume in the left sidebar, ("Macintosh HD" unless you've renamed it). What is the hard drive capacity and how much space remains available on it? Repair permissions on it.
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Fan noise when screensaver starts

Hi
I've been reading about this issue but don't find any post that relates fan noise with screensaver.
I had fan noise problems similar to some posted... things got better,but now it only becomes unbearable when the screensaver starts.
Any ideas ?

I'm experiencing the same issue since I've replaced the standard Nvidea for an Ati Radeon HD3870 video-card. When the screensaver starts the noise of the fans increases. Don't understand it since it's just the solid colors effect.. :-s

Our brand new quad core imac will not start up. We hear a drive and fan noise but the screen remains black. Any suggestions?

The computer shut down on its own while we were gone and will not start up again. When we press the power button we hear drive and fan noises but no chime and the screen remains black. Any suggestions?

A pretty common thing for computers that have been shipped is a RAM chip becoming dislodged just enough to cause what you are describing. Try re-seating your RAM chips. Basically just pull them out and push them back in. Take a look at this article if you need some direction on this: http://support.apple.com/kb/HT1423

Why does my MacBook Pro suddenly turn really really slow and make a really loud fan noise?

Whenever I turn on my MacBook is runs perfectly fine for 2 minutes but then it turns really slow (to the point that it takes ages to move the mouse cursor and to type) and make a really loud fan noise. What should I do to fix this?

Welcome to Apple Support Communities
There's a process that is taking up the RAM and CPU. Open Activity Monitor (in /Applications/Utilities), and select "All Processes" above "Show" in the toolbar. Then, order processes by CPU, and tell me which processes you see that are consuming more CPU

HT3964 How do I stop my Macbook from overheating and making a fan noise?

My Macbook Pro 17 Inch keeps overheating and making a fan noise after I use it for... say... an hour.
I use Windows on my Macbook, is this related to my problem? If not, do I need to get my fan replaced?
It gets annoying whenever I play a game, and then suddenly my Mac goes to sleep for no reason (probably due to overheating).
The fan noise is kept to a minimal when I use a web browser, or listen to music, but it goes up when I start an application.

Since overheating is something the computer tries to prevent, it will shut down if the temps get too hot, thus your experience is not overheating.
You can have a look at Activity Monitor (Menu Bar > View > Show All Processes) and then sort by CPU to see what the culprit is during downloading.
A hot Mac is not that big of a problem, the fan takes care of the heat and if you do not mind the noise, then that is it.

Why do I have fan noise after OS 10.7.5 update?

I used to have moaning sounds coming from my Mac Pro (Quad Core, early 2008) when I was in motion graphics programs, or in NetFlix. But ever since I updated to OS 10.7.5 3 days ago, the fan moaning is incessant. Help! I just spent $200 on an old geezer "official Mac" technician, who came to my home office and spent 2 hours doing DiskWarrior!
I am so busy right now, I can't stop to take the tower to a local authorized shop. Will the noise sink my CPU? What is causing it? Is it a glitch in OS 10.7.5? Or do I need new fan(s)?
Anyone hear complaints of sudden incessant noise other than mine?

I used the following:
Copy and past the following in terminal followed by your password when asked for:
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist
Note that if you've got anything listed in the Spotlight control panel in Privacy, it will be deleted.
To turn it back on (which I haven't tried yet since I don't use Spotlight):
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist
When Spotlight is frantically reading everything and indexing it, a lot of CPU % is used, and the HD is being exercised too. That generates heat and could be the cause of the increased fan noise when your Mac Pro speeds up its fans to try to protect itself. 10.7.5 seems problematic in this respect and since your noise problem started after the 10.7.5 update, the two might be connected. Apple tends to run a Mac Pro's fans very slowly to keep the machine quiet, so any speedup would be noticeable.

Macbook fan noise

My 2015 macbook pro started making a loud fan noise all of a sudden for about 10 seconds and then back to silent. is this normal ? The sound was more like a jet plane

When does it do that?
Try resetting the SMC
Intel-based Macs: Resetting the System Management Controller (SMC)

Intermittent shutdown, fan noise

I have an iMac G5 ALS, 17", 1.8ghz that I bought new from Apple in August '05.
The serial # starts with W853.
It has always had an over active fan IMHO, but I've read of this complaint often on these forums, so I never paid it much mind. In June '07 the iMac started intermittently shutting itself down so I brought it in. I had Apple Care thankfully so they swapped out quite a few parts, including some sensors, the Logic Board, and PSU.
I brought the iMac home, and within a day or too the hyper-active fan noise was back. However, the iMac was not shutting itself down randomly anymore... until today.
The system log shows me, "AppleSMU -- shutdown cause = -110"
It happened once, I haven't been able to reproduce it yet, but it of course has me worried.
I have central air in the house, the room never gets above 75 degrees.
The CPU at rest/casual computing is around 65 degrees with the fan whirring away at 5600rpm.
Hard Drive at 44 degrees, fan at 3206rpm.
WDC 49 degrees, fan at 2500rpm.
What is the real story with the iMac G5? Are there things I can actually do to keep this machine running while avoiding intermittent shutdowns, and reigning in this fan noise?
Thank you in advance for taking the time to share your experiences and advice.

I'm having a similar problem with the sudden shutdowns but not with the fan noise. This just started today after being out for a few hours I noticed that the computer was shut down instead of asleep. I booted it up and it shut down within a few minutes. This continued for several attempts and now I can't even get passed the startup sequence before it shuts down. I can't run any tests on it 'cause it will shut down in the process if not before. I am still under the extended warranty so I guess I will be taking mine in as well. What could be the cause of this? Does anyone have any other suggestions?

Fan Noise After SMC Reset

I apologize if this question has been covered in another post; however, I looked around for quite a while and didn't see anything.
I suddenly started having issues with my iSight today. I searched troubleshooting and was instructed to reset my SMC. Which I did. As soon as I powered my computer back on, though, the fan started blowing like crazy. It's far too loud for normal use! (My iSight works again.)
Can anyone help me return the fan noise to normal. Everyone else says to reset the SMC... but that's what caused my problem in the first place. Any help would be GREATLY appreciated!!

Be sure that after resetting your SMC you are not pressing the power button while plugging the power cord back in to your iMac. If you did, you need to reset your SMC again

Big fan noise problem: the rear fan won't shut off, the BIOS won't update, systemupdate locks up

I received new ThinkStaion (oh boy, lots of memory and CPU speed, yay!)
I unfortunately left the originally installed Vista OS on there. Very much regretting that as I believe it contributes to the following problems (BIOS).
So the original problem was that after just a month of using my new ThinkStation, the System Board died, and it had to be replaced. Honestly, all I did was choose the sleep or hibernate option in Vista to shut down. Afterwards,poof! didn't even get the proper Power lights on the system. I diagnosed this with the online docs and then sat for a few hours on our tech support line doing all the same things to re-diagnose it.
So after the replacement, the rear fan will not shut off. Jet engine noise all day. I went into the system settings and selected "Quiet" for the Fan settings but that did not help.
Research on this forum resulted in the possibility of a BIOS update fixing the problem. Comparison to my co-workers systems which arrived at the same time shows this BIOS is woefully out of date, so even if it does not fix the fan issue I want to update it. However, everything I've tried to do is failing for one reason or another.
(The fan issue does need resolution since in one week I will end up sharing an office (first time in many years, thanks IBM for nothing!) so since I don't want us both to have to wear noise cancelling headsets, I'd like to fix this without having to just pull the @#$@ power to the fan. Grrrr. )
I downloaded what I felt were the appropriate Lenovo apps to update both the BIOS and the serial number but none seem to work properly from the command line in Vista. One of the two (can't recall which) asks me to reboot and it never actually shuts down. Eternal "Shutting Down" message. Ga! The other throws some gosh awful
systemupdate le
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-69701
eternal reboot
BIOSD attempt:" 2xjy26usa
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-69701
error 1275 no admin priv - I AM the administrator account, there is no other acct to use!
Then I decided Vista might be the problem and found sites recommending flashing the BIOS from a bootable USB. So I started down that path and after burning the wrong version, finally geting the AIK Vista tools installed and to the point of trying to make the USB bootable, it won't allow me to put the OS boot on it. Ah, for the days when a simple "sys a:" took care of that.
So, after reformatting the USB and pounding my head in the wall, keyboard, etc. I am at my wit's end. What to do. I just want the fan noise to go away.
This does seem to duplicate other forum messages but I can't get anywhere on this. Help!
Solved!
Go to Solution.

FYI to all the helpful folks here (and any looking to shut their jet engine off as well): Flashing the BIOS did the trick.
First I had to find a website with DOS OS files and put those on the USB instead of Vista. Oldie but a goodie, but at least it booted! No other versions would.
I had been intending to use the WinPhlash utility that Lenovo supplied with the BIOS update but since I was booting from DOS that was useless. However, I found a DOS version of it and used that instead. Boom baby! Flashed and rebooted.
It did take two boots to get it back to normal (first one gave very alarming messages about no operating system being found but I think it was just a remnant of the reboot that was triggered from the DOS session). A second boot returned life to normal and blissful silence from the server. And I was finally able to get the model and serial number back in there to get rid of the bootup message it throws for that too.
Ahhhhhhh.
Thanks to all for the hints - I believe I had gotten the idea of flashing the BIOS to solve this from some other thread I found here. This is a very nice forum to have bookmarked.

Start fan noise suddenly

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