Fan keeps on working loud

Hi there,
I have a mac mid. 2006 and it keeps on working on 6000 rpm and gets slower when I really does nothing. Even browsing or email checking( simple tasks) makes it loud. I've already checked there is no process, which is eating CPU. I tried resetting PRAM and SMC and that doesn't help and there is also no printer installed( which means no task in queue) .
any idea?
PS: as written here, OS is Snow Leopard

rajesh08 wrote:
i have a macbook unibody. From the last week i am observing that my macbook gets heated fast. i am not running any special app just Safari browser. After some time of browsing the CPU temp runs to 65C and above .Hence the fans start running full making noise which is really very disturbing. Please comment on the solution possible. I checked with the activity monitor for run-aways process but none
Well, first of all you should try to check followings :
1-Look if there is any pending task in your printer queue, if it's the case delete the task.
2-( if your browsing a website which runs flash player ( like youtube) the flash is the problem)
3- if there is no app eating the CPU/GPU try resetting PRAM and SCM

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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

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