Fans Power Up and Down

I just purchased a previously owned iMac G5 for my mother. The fans power up and down continuously. Is there a reason for this and how can I fix it? I also checked the Activity Monitor and didn't see anything.

Sounds familiar, I just spent 2 hours yesterday dealing with my mom's 2007 iMac with the same high-spinning fans, the CPU was going >3500rpm. It had already been to the Apple Genius bar once and they replaced the logic board and fans. However, it didn't go away, so here's what I did:
1. reset the SMC a bunch of times (shut down, unplug all cable, unplug powercord from computer, wait 15+ seconds, plug in power, plug in keyboard, restart.) Fans kept going high.
2. when the SMC reset didn't work, I ran the Apple Hardware Test from startup CD. A sensor error came up: 4SNS/1/40000000:Tp0P and the test told me to shut down, take off peripherals, restart from the Hardware Test and run the extended test. it passed. the only difference was the printer and ethernet weren't connected. So I played around with starting it up with 1, 2 then 3 cables, in different slots. Switching the USB printer cable to a different slot seemed to make the difference in my case. iMac has been running quietly with fans <1200rpm.
good luck, hope this helps.

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My iphone would randomly power up and down after latest software update. now won't power on at all.

Anybody know why my iphone 5 would randomly power up and down after the lastest software upgrade, and now today, won't power on at all? the screen is now randomly showing the apple icon, but won't power on. This a fairly new phone. Any feedback is appreciated.

Try this:
Settings>General>Accessibility>Reduce Motion>On
My software upgrade set this to off.
Hope it works.

Fan speeding up and down.. whistling

Hi,
I have a fan that's speeding up and down in the top of my mac pro. It's not the graphics card, but up in the top compartment and sounds like it should probably be replaced.
I know my mac should still be under warranty since it's really been under a year since I bought it, but is this something that's covered?
if not, is it possible for me to even take these out and replace them myself-maybe with something more robust? Where would I find a part number?
thanks,
Dave

Anything is covered and given the cost of a PSU or something.... AppleCare Backups UPS and of course monitor system temps and even fan speeds with something like iStatPro or Hardware Monitor.
I would consider trying to take it in while you can and before there is real harm. PSU failures happen. If was a corroded wire lead, but if it is something else....
I found AppleCare on Amazon to be slightly less.
http://store.apple.com/us/product/APPLECAREMACPRO-102586
http://www.amazon.com/AppleCare-Protection-Plan-NEWEST-VERSION/dp/B004R6LTNK/

HP compaq micro fan speeding up and down at 6 second intervals?

HP Compaq d530ff
WINDOWS XP
What is the cause and fix for the computer micro fan speeding up very hign speed and down at 6 seconds interval?
This question was solved.
View Solution.

clean heat filter on micro, solved proplem

Ipad Air Power up and down problems

Over the past month, my new iPAD AIR has been experiencing some power problems. Feeling confident I'd left my iPAD Air on, three times I've gone to log in and found a black screen. I tried to power it on with the power button, but it would not power up. I had to do a forced quit with both buttons depressed to get it to reboot. Last night I powered down before bed, and awakenend unable to power up with the power button. Once again I had to do a forced quit (both buttons depressed) to get it to boot up.
Also, SAFARI APP on iPAD AIR has been quiting quite frequently during a swipe to a new page launch. I've noticed this on my iMAC as well.
Any help is appreciated. I think a visit to the Genius Bar is needed, but I'm hoping it may be an easier fix.

Hi Zamo1951,
Welcome to the Support Communities!
The information below may help you with this issue.
iOS: Not responding or does not turn on
http://support.apple.com/kb/TS3281
Hope this helps .....
- Judy

M55 8810 fan reving up and down

Just picked up a Thinkcentre m55 8810 BQ4 desktop. Works great except for the fan. It will rev up to full speed, slow down, rev up, slow down. Sounds like a teenage driver at a red light with a manual transmission. Doesn't do this all the time but enough to make it annoying to anyone in the room. OS was upgraded to Windows 7, 32 bit from XP. BIOS is Lenovo 2JKT49AUS and SM BIOS is 2.4. Any suggestions? Thanks! Ed

Anything is covered and given the cost of a PSU or something.... AppleCare Backups UPS and of course monitor system temps and even fan speeds with something like iStatPro or Hardware Monitor.
I would consider trying to take it in while you can and before there is real harm. PSU failures happen. If was a corroded wire lead, but if it is something else....
I found AppleCare on Amazon to be slightly less.
http://store.apple.com/us/product/APPLECAREMACPRO-102586
http://www.amazon.com/AppleCare-Protection-Plan-NEWEST-VERSION/dp/B004R6LTNK/

Removal of Vodafone graphic on power up and down 5...

I have 5800 xpressmusic which was originally supplied aqs a Vodafone upgrade but never used. In it's unlocked state I have begun using it on O2 (in UK) and it works just fine.
When the phone is powered up or down, after the Nokia logo graphic displays, a Vodafone graphic is shown. This sin't causing me problems as such, but I'd like to get rid of it.
Any ideas how people?
Thanks in advance.

truly only voda can help you with this in legitimate ways. your phone maybe unlocked to any provider but the phone is still branded. did you try installing/reinstalling the most up to date firmware update? perhaps that could be the only way you could do this and not void warranty. there are other ways but those can't be discussed here on the boards. if you chose to install most up to date firmware just make sure you do a back up of all your stuff as you might lose all your data.
You know what I love about you the most, the fact that you are not me ! In love with technology and all that it can offer. Join me in discovery....

Help MSI GE60 Fan keeps spinning to 100% and down every 10 seconds.

Hello,
I just bought an MSI GE60 and after 4 days of using, The fan keeps spinning up and down every 10 seconds even when nothing is running on the laptop. Have tried updating the BIOS and the drivers, but no change.
Every time i turn on my laptop this always happen. It goes on when my laptop is on. Even if im not doing anything it still keeps spinning up and down. I checked the temperature and its at 40+ C and my CPU usage is normal. Basically im not doing anything and it keeps doing this fan spin up and down.
Even when the cooler boost is on or off, its still does the same thing, the fan keeps spinning up to 100% and down.
Do you think this is a software issue or hardware? It is very annoying to hear the fan go 100% for 10 seconds then back to normal then back to 100% speed again and when i press cooler boost it doesnt do anything. So even tho the cooler boost button is off, it still keeps doing the 100% fan speed and back to normal again. It keeps repeating.
Can anyone help me solve this problem please? Thank you very much.

Quote from: reprieve.nagrand on 03-May-13, 08:35:31
I have already tried uninstalling the S-bar and SCM drivers but still getting the fan noise. Also tried the no-battery and no-power reset for more than 24 hours but still having the same problems. The only thing that worked was changing the values in the RWeverything software. The only problem here is that it will work only until I shutdown the laptop. Once I do a cold boot I have to redo the RWeverything changes again.
@reprieve.nagrand
thanks for your case. Can I ask you a few questions more, please?
1. According to your model id your notebook came with just FreeDos, right? Could you please enter the Bios and go to System Information to confirm that you are using Bios 10F and EC version 14.04 (or 4.04)?
2. I urgently need a screenshot of your EC-Page within RWeverything after a cold boot without any modifications. Please try to make the screenshot at that time, when you can barely hear the fan anymore during the spin-on / spin-off cycle.
3. CoolerBoost: with a laptop that has been sitting idle for at least 20mins since last cold boot (no load, please!), can you turn on coolerboost by pushing the button somewhere to the left of the Powerbutton and let coolerboost run for at least 30 seconds. Then turn coolerboost off again and wait for the fan to slow down. Does the fan run continously after applying coolerboost or does it enter its off/on-cycle again. Please try it for at least 5 times and repeat it during other Windows sessions for two times. If this trick works, you are the man to make the video! Please help me out here. Please note, that the coolerboost trick will only work until there is load on the system again. If the fan speed picks up again due to load and slows down again, it will enter the annoying pattern, again.
4. While still reviewing the case and going through my notes, I came across an entry that I reflashed the EC-Controller with the same firmware one or two nights before the problem disappeared. This happened after uninstalling S-Bar and SCM earlier. So, if you are familiar with DOS-Flashing using USB-Sticks you could try to reflash the EC-Controller, than remove all power sources for at least 20 mins. If anyone else is experiencing the problem, please go ahead and report your findings. But please do the reflash only if you are familiar with such things and of course, please do so on your own risk!
Current status and work in progress:
As I haven't gotten hand on a video proofing that simply pushing the coolerboost fan button makes the problem temporarily go away, I am still stuck on there. The coolerboost solution works until the system load increases so much, that the fan level has to be raised. When the system load goes back to idle again, the fan level decreases and enters the off/on-cycle again.
The good news is I managed to customize a programm called fan control tools to somehow automatically apply the changes in RWeverything via a small GUI. This tool will also allow you to set fan profiles for Office, Games, etc. The bad news is, that this will trigger UserAccountControll at least once and it doesn't reapply after a cold boot or returning from hibernate, yet. I am now currently working on a solution that allows the new fan values to be set by Windows automatically using a batch file. This will apply the new values after a normal Windows boot, but not when returning from hibernate, though.
However, if you have found your remedy value for the fan issue within RWeverything, you can turn to Svet in the subforum "Notebook Modified & Private BIOS'ses & EC-FW". He will certainly be able to create you a custom EC-FW with those values written permanently in it.
My case:
The fan problem with my notebook has not (yet) returned. It has been running without S-Bar/SCM just fine. It can even process all fan profile alterations I have made. So, am I just lucky? While I do believe, that the fans of those notebooks experiencing the issue could be "somewhat odd", I find it hard to believe that my fan really suffered a mechanical problem. Without doing anything mechanical wise, my problem went away.
@Warner: I promised to present more videoproof of the case, but unfortunately I haven't managed to get a hold on a suitable video, especially since my unit has been running fine for the last weeks. Please be patient, if I have enough evidence I will post it asap.
One question bothers me though: looking at the EC-page of RWeverything, I was wondering if these are really all values, that the EC handles and checks. Are there any other values, variables that the EC manages and that are not displayed on the EC-page of RWeverything? The reason for asking this, is because I have a video showing the ECpage of RWeverything while the fan does his off/on-cycle and you can clearly see the RPMvalue correspond to the actions of the fan. As you pointed out, the boosts occur because the EC is missing a fan signal, I could clearly see the RPM value at offset 0xCD respond to the actions of the EC. If the controller looks for that value only, it should surely see the RPMs of the fan, as I can see them in RWeverything. So, I was wondering if the EC has other values not shown in RWeverything, that determine if the EC should enter the boost cycle?
While having another look at that video again, to me it appears as if the EC does this really on purpose. It tries to reduce the voltage of the fan to a point so low, that the fan simply starves. Then it boosts the fan up again. The only question is: why does the EC do that? Is there a leftover setting inside the EC - perhaps from another notebook - where such low RPMs were achievable?
You can find the video here in this zip-file: http://www.file-upload.net/download-7371226/MSI.rar.html
In the zip-file you will find three numbered videos, the first one is the most interesting as it shows the annoying fan cycle while the laptop is running idle. In the second one, the user put load on the system using prime95. The third one shows the system while it cools off again after prime95 has been stopped. Sadly, the video is too short as the system doesn't reach its lowest fan state again. The videos were taken in march in Germany, so the ambient temperature is around 20-21 °C or less (normal room temperature in Germany).
Regards,
jku

Fan up and down

Question 1: does anybodys fan rev up and down when searching the web? this last only for a moment but very annoying.
Question 2: when i change the applications icon it changes back to the original icon?

Question 1: does anybodys fan rev up and down when searching the web? this
last only for a moment but very annoying.
This is normal if the website you are visiting has a lot of graphics, uses some java applications, or other animations.
It was far more noticeable on my rev. A system than on my newer rev. B iMac G5.
Question 2: when i change the applications icon it changes back to the
original icon?
To change the folder icon for your Applications folder, any other folder, or even a program's icon, follow these steps:
1) Copy the picture you want to use as an icon into your clipboard. This is usually done by selecting the image with your pointer (clicking on it), and then going to the "edit" menu and clicking on "Copy".
2) Click once on the folder or program icon you wish to change (in the "Finder".
3) Then, go to the "File" menu, and select "Get Info".
4) In the window that opens, you will see a tiny icon in the top left-hand corner of the window. This icon should look like the currently assigned icon. Click once on this small icon. This should highlight it with a thin blue border around the icon.
5) Go to the edit menu, and select "Paste"
6) Close the "Get Info" window.
You will have now changed your icon for the folder or program in question.
I tried this successfully on both my "Applications" folder, and a program, and a new folder I created.
So, give it a try and see if this method works for you.
Hope this helps.

Fan Runs strangely and Warcraft 3 and expansion run strangely...

I have been experiencing my MacBooks fan rev up and down and sometimes completely stop for maybe 5 seconds then just rev up again and slow down then get really loud then slow down etc. Is there any way to see how fast my fan is running? And if I need a new fan?
The Warcraft problem is when I am playing the game it will lag and then the sound will repeat multiple time and my cursor will "float". It makes my entire computer stop for a second then act funny for a second then go back to normal. My itunes music will repeat multiple times (like a record skips) also. Sometimes in the worst case the music will completely become just distorted but when i plug my headphones in and out it repairs it. Sometimes when this problem happens there will be a long tone coming from the speakers when this problem occurs I restart my computer.
Can anyone help this?? I know its very strange and quite annoying! So plleaassee help!

I updated to Lion 10.7.3 and started noticing my fans running on high all the time and my battery would drain 2-3x faster. I was going to take my computer into an Apple store until I found this thread. I did the SMC reset by shutting down my computer, plugging it in, and then pushing down shift+control+option while also pushing down the power button. Nothing happens on the screen and the computer did not turn on. I then released all the buttons at once after holding them down for 10 seconds.
After that, I simply turned my computer back on and everything seems to be working fine. The fans are not blasting anymore. I have a newer MacBook Pro where I can't access my batteries. The SMC reset may differ for other types of laptops.

My Mac Mini was not sending a signal to the monitor. I powered down using the power button and now it will not start. When i power up I get a strange 2 tone sound, like a warning alarm. The fan starts, and the light comes on, but no screen

My Mac Mini was not sending a signal to the monitor. I powered down using the power button and now it will not start. When i power up I get a strange 2 tone sound, like a warning alarm. The fan starts, and the light comes on, but no screen.
I have tried with a wired USB keyboard and mouse using a single screen. Powered up with option pressed. No change.
Reset SMC no change

Run the Apple hardware test to see what it tells you. Run the extended test when prompted, which can take awhile.

"Moo" = Right fan repeatedly spinning up and down under certain conditions

I am pretty certain I have figured out what is causing the "moo". Here is my theory based on a couple of weeks of experimentation...
It is the right fan starting up and stopping. Again..and again...and again. It does this in response to temperature changes. But the threshold is too sensitive so what happens is an increase in temperature triggers the fan, the fan winds up and in so doing after a couple of seconds this immediately drops the temperature below the threshold and so the fan winds down. The temperature now builds and after a couple of seconds the fan spins up again. It will keep doing this until either activity falls so that the temperature stays below threshold or continuos activity ensures the temperature stays high enough to keep the fan on at low speed (when it is generally quiet unless there is a heavy load).
I will guess the cause is probably a faulty sensor, faulty fan or most likely faulty fan control logic since this is clearly happening with a lot of MBPs. If it is the latter then presumably they need only change the firmware controlling the fan to make it start slower and stay on longer.
Why doesn't everyone hear it?
a. Like most fan type noises they are only apparent in a quiet room - as most people work in rooms full of white noise they simply will not hear it even if it happens.
b. Some people have better hearing and are more sensitive to noise.
c. It needs the right set of hardware and sofware activities to trigger the problem...............
In my particular case I typically have my 2.0ghz MBP connected to an external monitor, ethernet and external USB mouse on the right side of the MBP. When I am using the MBP standalone (ie without more heat being generated) the noise does not occur as often, presumably because when idling less heat is generated.
As you change what you are doing with the machine (not sure if its CPU or Video related changes that matter most) the noise will start or stop happening. Doing absolutely nothing typically means the noise does not happen so often, but then again it can be sitting doing nothing and it will start happening. Doing a bit means (say 10-30% CPU) means it will make a noise , doing a moderate amount (say above 40% CPU) means it does not happen because the temperature stays high and the fan stays on - generally being quiet at low speed. If you push the machine (say 80% CPU) then a louder fan noise is noticeable. I have also found that opening/closing the lid (when using an external monitor) makes a difference, the surface it is on makes a difference and the room temperature probably does as well.
A good way to experience this is to start Garageband recording the noise when it happens since the additional load stops the noise. The spin up/down cycle will continue for 4 or 5 cycles as you record the noise but then the fan remains on very low speed as a new higher thermal equilibrium is achieved.
For reference I am on my 2nd MBP (the first also had this problem but it was less noticeable) and have experienced most the other noises:
a. Left Fan always runs on both machines
b. Screen buzz when not on full brightness on 1st MBP not in on 2nd.
c. CPU whine was not on 1st MPB but it is on the 2nd - but only at low level and only if running on battery power.
I have a couple of other irritating problems:
d. Screen dims after 2 minutes regardless of power setting etc.
e. Fit of 1st MBP was great, 2nd not so good.
Personally I find the fan spinup/down noise very very annoying, far more so than the left fan always being on. I really do need Apple to fix it, but I dont see the point of sending the machine in unless they recognize the problem and have a systemic solution since clearly this is common problem. Otherwise the chances are a tech will plug it in standalone in a noisy repair shop, hear nothing and either do nothing or never know if its fixed or not. So far no intelligent response from Applecare......If I can figure this Apple ought to be able to and get a fix.
And no I would not recommend buying a MBP until this problem is fixed if you are at all sensitive to noise and work somewhere quiet - because it appears to be a gamble as to whether you will get a quiet MBP or not. That's a shame since otherwise its a very slick machine.

I agree with u; however:
-The left fan that's always on is the Hard Drive - listen to the hard drive to the left of the trackpad and you'll realize that it is coming from there.
-My "moo" sound comes from my LEFT fan. So if it's a firmware issue, why would the side of the fan affected by the problem varry? this leads me to the worrying assumption that it is a hardware issue...If this is the case, who knows if apple will even cover it under warranty if it doesn't affect the performance of the system...

Monitoring 3750x and 3560x Redundant Power Supply and Fans

I need help for monitoring the redundant power supply of my switches (3750x and 3560x)
I have configured my snmp on my switches and is able to monitor interfaces, temperature and etc.
The problem is when I am monitoring the redundant power supply and fans.
I am using two Cisco C3KX-PWR-350WAC Modular Power Supply per switch.
The OID I use to monitor the PSU are the following:
Power Supply 1
.1.3.6.1.4.1.9.9.13.1.5.1.3 Instance: 1003
Power Supply 2
.1.3.6.1.4.1.9.9.13.1.5.1.3 Instance: 1004
When I do an SNMP walk, the value is showing (1) which means normal.
When I simulate a power outage on power supply 1 or 2 by unplugging the power source, the value doesn't change and is still (1).
Values: normal(1), warning(2), critical(3), shutdown(4), notPresent(5)
As for the Fans:
When I remove the fan module, I am able to get a notification that the fans are down, but when I plug back the fan module it is now using a different instance.
Below is my config for SNMP:
snmp-server community XXXXXXXXXXXXXX RO
snmp-server location XXXXXX
snmp-server contact XXXXXX
snmp-server chassis-id Cisco3560X
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server enable traps transceiver all
snmp-server enable traps tty
snmp-server enable traps license
snmp-server enable traps cpu threshold
snmp-server enable traps syslog
snmp-server enable traps vlancreate
snmp-server enable traps vlandelete
snmp-server enable traps port-security
snmp-server enable traps envmon fan shutdown supply temperature status
snmp-server enable traps errdisable
snmp-server enable traps vlan-membership
snmp-server host X.X.X.X version 2c XXXXXXXXXXXXXX
Note: This problem is the same for all of my 3560X switches and 3750X switches. I am not sure if I am monitoring the wrong OID.
Thanks in advance

Hi ,
You are running an old IOS code , definitely you are hitting a BUG .
there is no workaround or I would say unfirtunetely you will not be able to get the correct power supply status via SNMP.
you need to use command line for this.
I mean "show env all "
**** if you want to know the Excat BUG that your code is hitting ,please contact TAC.
Thanks-
Afroz
**Ratings Encourages Contributors ****

My macbook pro 2006 fan goes high and then makes a fast beep and shuts down it been happening since i updated

my macbook pro 2006 fan goes high and then makes a fast beep and shuts down it been happening since i updated it should i update to lion?

No, this problem should be solved.
The MBP shuts down when too hot, to protect itself. First see if it is a process running astray: start Activity Monitor (in Applications/Utilities) choose <all processes> and click the %CPU column: are there processes that are using more than 50% cpu power? If yes click it and quit it, and tell us which one.

MDD power supply and fan upgrade kit question.

Hello, Its been a few years since I posted anything here and I'm getting ready to (possibly) trade in my mirror drive door 1GHZ dual processor machine on one of the current imac-s.
I'm not real hopeful that putting much work into my current machine is worth it. Here's why:
1) crazy levels of noise - I wear woodworking hearing protectors when I surf the web. Listening to music on itunes is fine so long as you like a background of low level blow dryer noise!
2) I'm still running OSX version 10.2.8, I have been too cheap to buy the latest OS. I'm tempted to go out and spend the $119 on 10.5 but I only have the original 256mb of ram installed and since the min requirement of ram is 512, I know I'll need to spend an extra ~50$ on a 512mb PC2700 ram chip. My price tag to do a minimal update is rising...
3) I would love to neutralize the noise and install the Apple provided MDD power supply and fan retrofit kit that they sent me at no charge several years ago while I was still under warranty. But I never did because the tech at my local (Dayton Ohio) reseller told me that the kit only addressed high noise levels when rebooting in OS9. So I never bothered. Looking on ebay, I see where power supplies for G4's could fetch 75 or 100$ or so.
In summary, here are my questions.
1) Has anything come along recently to tame MDD G4 fan noise that is easy to install, cost-effective and most of all, something that actually works to decrease the noise?
2) To get the quietest, quickest performance with the current OS 10.5 should I cut my losses now and trade (or sell on ebay) my MDD, sell the new power supply and just purchase a new machine with the OS already installed?
Thanks a bunch in advance for any assistance...
from Bill.

Bill,
Carl has some pretty good points that I'd agree with - trying the replacement PSU and fans should quiet it down somewhat and replacing the stock main fan with a newer, quieter unit will also help. But I'm going to disagree with him on running Leopard on the G4's with a few reservations.
As you might notice from my profile, I'm running Leopard on my dual-867 MDD and find the performance acceptable; perhaps a little slower than Tiger in some respects but it does run well enough within the limitations of the G4's capabilities. The reservation I have about recommending Leopard on a G4 is the graphics card - without Core Image support (which you won't have unless you upgrade the video card) Leopard is going to tax the CPU more and may bog down in some tasks like Quick Look and Cover Flow.
In the end, whether to continue upgrading the G4 is a matter of use and economics. Tiger would be a fine upgrade with minimal cost and squeeze a few more years out of your G4 if you're not requiring software that needs an Intel CPU (like certain iLife '08 apps).
-Douggo

Fans Power Up and Down

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