Strange fan problem
Whenever I plug my MBP into an external monitor (Apple brand), the fans go to 6,000rpm (basically max speed) and stay there. I've checked the core temperature and it's only about 60-65 celsius so there's not need for the fans to max out. I've also looked in activity monitor and the loads are low (load averages of .50) and there are no runaway applications.
I can't for the life of me figure this one out. I've tried resetting the SMC several times but to no avail.
Eventually in a desperate move to stop the noise, I used the command-line utility that comes with smcFanControl to set a max fan speed of 4,000 rpm. Doing this proves that the machine is setting the fan speed way faster than what is needed since the temperature hasn't moved up with the fans at 4,000rpm max.
And before anyone tells me: yes, I know it's not a good idea to limit the max in case loads do increase and I cook my processor. I'm doing it as an experiment.
So, does anyone have any ideas?
For what it's worth, it didn't always do this although I can't pinpoint what might have changed.
{quote:title=Stephen Schwartz1 wrote:}
Eventually in a desperate move to stop the noise, I used the command-line utility that comes with smcFanControl to set a max fan speed of 4,000 rpm. Doing this proves that the machine is setting the fan speed way faster than what is needed since the temperature hasn't moved up with the fans at 4,000rpm max.{quote}
Can you tell me how exactly one does this, with smcFanControl and the command-line utility (where is it)? I have a similar problem: My iMac fans are going crazy due to a broken temperature sensor somewhere, and I'd like to limit the max fan speed. I don't care if it is risky, I can't use my iMac as it is because of the roaring fans. Thanks in advance!
Similar Messages
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Hi,
Last night, I had a strange shutdown problem on my iMac G5 (revB, 20", 2.0 Gig), with 1 Gig RAM, running 10.4.4 with all updates. I had had the computer on most of the day, using it off and on. I shut it down, and left the room. When I came back about an hour later, the fans were running (not rapidly, just at the normal speed they run when the computer is running), but the screen was blank, and the "sleep" light was not on. The computer wouldn't respond to any moving the mouse or to keyboard input. I finally shut it down by holding the power button until the fans shut down. Upon restart, everything was normal, and after using it for a few minutes, I was able to shut it down normally. Has anyone else seen this sort of behavior, and is it normal ? Or am I about to have more problems.
Thanks in advance,
Dave Fritzinger
Honolulu, HIHi Dave,
By the sound of it your computer has "hung" during the shutdown process, but at a point in the process where the system's temperature control mechanisms were still operating (otherwise the fans would be running flat out). My guess in this case is that it was probably actually a finder crash.
Various things can prevent proper shutdown. Often USB or FW devices are to blame. USB adsl modems , some scanners and hubs and the occasional printer driver seem to be common causes. Software can be responsible too, though - background virus or drive checkers are probably the most common, but far from the only possible causes ( I seem to remember "SpringCleaning" causing this problem when people moved to Tiger 10.4.2 for example) .
New software or hardware are therefore the first things to look for.
If you haven't installed anything completely new then one possibility may be that something you are using is not compatible with the latest OS update, and needs an upgrade to a driver. Its also possible that this is a "one off" glitch caused by a temporary problem , but if it happens again I'd be taking careful note of anything that you were using in the previous session.
You might also want to use the Console (in Utilities folder) to look at your system and crash logs.
Cheers
Rod -
Strange major problem with 975X PowerUp Intel MOBO
I’m suddenly having a strange major problem with a MSI 975X Platinum PowerUP Edition V2.1 MS-7246 Intel socket 775 motherboard. Previously, it had given me no problems at all.
It went like this:
Powered on system in the morning, booting from a cold start.
Hit DEL key to get into the BIOS.
Missed the window and the system booted into Windows normally.
Re-started the system from within Windows.
Hit DEL key to get into the BIOS and was successful the second time.
Hit the ENTER key on the first item “Standard CMOS Features”.
The DATE, TIME and other information was displayed on the next screen, but at this point, the BIOS screen became completely unresponsive to any keyboard input.
The only thing I could do at that point was to power off.
Subsequent power on boot-ups resulted in the system always freezing at the BIOS splash screen after the video card sign-on.
I have switched power supplies, hard drives, keyboards and video cards. I have disconnected everything except the video card, keyboard and one RAM module. I have switched the four RAM modules around and then reduced the RAM to one 256MB module in the proper slot. I even changed the battery on the MOBO, in case it had shorted out and removed and re-seated the BIOS chip. It still halts at the BIOS splash screen.
The BIOS chip can’t be completely dead, because I powered off and pushed the BIOS reset button on the MOBO to reset the BIOS to the factory defaults. When I re-booted, I could tell that it had actually reset to the factory defaults because I had previously set the BIOS to reboot the system on resumption of power and the factory default was to remain off until the power button was pushed, which was now the default.
I’m stumped! All I can think of is to get a new pre-programmed BIOS chip and see if that makes any difference, but I’m not sure this system is even worth the expense with no guarantee of success. Any suggestions on how I might get past the BIOS splash screen or do I for sure have a corrupt BIOS chip?System specs as per the posting guidelines -
Board: MSI 975X Platinum PowerUP Edition V2.1 MS-7246 Intel socket 775
Bios: Version (can’t recall & can’t check since it won’t go past the BIOS splash screen)
VGA: ASUS EN7600GS nVidia GeForce 7600GS PCI-e 256MB DDR2 (also tried new XFX nVidia
Geforce 210 PCI-e 2.0 512MB DDR3)
PSU: Chiefmax 680W ATX (also tried new OCZ 700W ATX)
CPU: Intel 2.8GHz LGA-775 Core2 Duo Dual-Core Processor
MEM: 4 x Samsung 512MB 1Rx8 PC2-5300U (2GB total)
HDD: Seagate Barracuda 250GB SATA2 (also tried Seagate Barracuda 500GB SATA2)
COOLER: Intel OEM LGA 775 fan/heatsink C25897-001
OC: No
OS: Vista Home Premium 32-bit
I have been through the BIOS reset procedure several times and pretty much as outlined. As I said before, I could tell that it had taken a reset to the factory defaults, because the power on option had changed. -
Just recently I did a fresh installation of Mavericks 10.9.2 onto a new Samsung 840 EVO 250GB SSD (connected via an ICY Dock Enclosure) and placed it into my Mac Pro 4,1 (2009) 8 core as my main system drive and have since been experiencing strange Fan behaviour.
When I boot my Mac up everyday for the first time the Fans run at full speed, but if I reboot the problem goes away?.....
I have tries resetting the SMC and PRAM but it still happens.
I have also recently added a UAD-2 Quad PCIe card as well as replacing the stock graphics cards (GT120's) with an ATI Radeon 5770 which was a while ago.
This is the first time I have experienced odd Fan behavior since purchasing the Mac 5 years ago.
Can anyone help!!?..
Many Thanks,
NoodlezSimilar experience here. MacPro 4,1 upgraded processor 3.2 GHz, updated video to 5770 ATI. With those upgrades no fan issues. A few days ago added Samsung SSD 840 EVO 250 GB. OK first few days then shut Mac down for @ 48 hours. Today started it back up and PCI and Power Supply fans speeds were noticeably up. Waited a few minutes, rebooted and now back in normal/quiet range.
Just to update - my SSD install was done using a clone of my primary drive, not a clean install. -
Strange wifi problem on a brand-new MacBook Pro
Hey there, I'm new here. Desperation has got the better of me, and I hope I can get some advice.
So, last sunday I bought a brand new 13" MacBookPro with 2.8g i7 processor and 10.7.2 OS (I can't update to 10.7.4 because System Update tells me the download has been tampered with or corrupted after I waited 2 hours for it to finish, but I'm trying a direct download from the website). Here's the exact product: http://www.amazon.com/Apple-MacBook-MD314LL-13-3-Inch-VERSION/dp/B005CWIZ4O/ref= sr_1_5?ie=UTF8&qid=1340301247&sr=8-5&keywords=macbook+pro+13
Everything is all perfect except for a strange wifi problem. Note that the wifi does not turn-on or off, it doesn't disconnect after 'sleep', it doesn't get less speed, it doesn't constantly leave a preferred connection (once I chose my home wifi it always connects to it no problem). The wifi bar is always full. What is wrong is that the internet is kinda 'glitchy'. The best metaphor I can think of is that it's like a car that has to be pushed down the road before the engine can start. Please, bear with me because this is kinda hard to explain and I'm not good at tech lingos.
One of the symptoms is browsing can get really slow and inconsistent, almost as if the wifi gets turned off in the middle of browsing. For example: if I look something up on Google and then open 5 new tabs, probably only 2 or 3 of those tabs will eventually load while the other two will not get past the long 'http:.......google.....etc etc' address and will eventually show one of those 'error loading page because there's no Internet connection' notice. This happens a lot. Sometimes I have to refresh/retry loading a page a couple of times before it finally loads, then usually everything will get back to normal and I will be able to open multiple tabs with no problem, but in a couple of minutes I would try to open another site and the problem will start again.
So I tried to see how it does with downloading using iGetter. Fortunately I also have a Macbook (white-plastic casing one) and my brother has an old 2006 MacbookPro so I can compare. With those two older Apples iGetter starts receiving data in less than 8 seconds after I click Start, while my brand-new Macbook Pro can take up to 15-20 seconds, sometimes it doesn't even start at all and I have to re-click the start button. But once the download actually starts (on my new MacBook Pro), it downloads like normal, it doesn't stop and the speed is also as good as I can get. Strange huh? Hence, like a car that has to be pushed before the engine starts.
I also tried 'speed testing' from a website with all 3 laptops. On my old MacBook and my brother's MacBook pro, once I click 'begin test' it takes only a couple of seconds of 'ping' before the download/upload speed measurements start, but with my new MacBook Pro (just like with iGetter) it takes up to almost a minute before the measurements start, sometimes it won't start at all and I have to re-start the test.
Well, thanks for reading. And hope you can help me shed some light into this. Because it is really preventing me from really enjoying my new MacBook Pro. And if this is most likely a hardware problem, I'd better get back to the store and try to get it replace or something while it's only been 5 days. *cheers*Hey guys.. Thanks for the replies. Unfortunately, I bought the MacBook in Indonesia where there are no such thing as an AppleCare. The only option is to leave the Apple product to one of the 'Authorized Apple care centre' and have whoever do whatever to it without guarantee of success. As for returning it and getting a brand new one, I also don't know if there is such a deal here, but that's actually a good idea, will try to go to the store tomorrow. Although, I'm worried that the problem might be with OSX Lion or something and getting a new one won't help.
mark75090, I've tried resetting the router when I first noticed te problem, didn't work though. I've checked my new MacBook's wi-fi (option+click wifi bar) and it says 'PHY Mode: 802.11g', so does my MacBook and the old MacBook Pro. I don't know what those mean though, and I don't know whether or not my router is an N., can you tell me more please.. I have tried with the other two turned off, and only the new MacBook using the wi-fi but the problem persists. I have also tried connecting directly to the router, but as I described, the problem is too subtle for me to notice the difference.
Also, if I create a brand new Wi-Fi connection in network preferences and connect to my router through the new Wi-Fi profile, the problem seems to be gone for an hour or so, then it always comes back though. I have also just finally installed 10.7.4, but it doesn't help either. -
Battery icon has an "x" over it and I need to have my laptop plugged in to be on. I've ordered a new battery to install, but I was wondering if it's possible that something else might be causing the fan to be on over drive constantly. I've tried resenting the SMC and the PRAM, but nothing has stopped the fans from running at higher than normal speeds.
If you've updated to Mavericks, you'll either need to use the original install DVD containing the AHT, or download the right one from Apple's servers, then replace the hidden /System/Library/CoreServices.diagnostics folder.
I think that replacing the battery is likely to stop the fan problem anyway. -
Very Strange Internet Problems
I own a MacBook Pro 15.4 Inch that I purchased about a year and a half ago. I recently upgraded to Leopard and have all the latest updates. I am from the US, and when I am home my internet works fine. However, I am on travel to Seoul, South Korea right now and am having a very strange internet problem.
As far as I can tell, the URLs that I type in to my browser are, sparodially, not translated correctly into the webpages that they are supposed to represent. This problem is probably effective 75% of the time, and the rest of the time my internet works roughly correctly. For instance, when I enter http://www.google.com, instead of being taken to the Google homepage, I am taking to the homepage of Jammin Beats DJ Service, an obscure website about a company in northern Pennsylvania. The actual URL of this website is http://www.jamminbeats.com, but when my internet is malfunctioning, 'jamminbeats' is for all intensive purposes replaced by 'google' (that is, it applies not only to the main page, but to sub pages, so "http://www.google.com/weddings" takes you to "http://www.jamminbeats.com/weddings" and etc). For most other webpages, one of two things happens. Either I am taken to the correct page but it is displayed without any images or frames (just the html text and links), or I am taken to a blank page with the header "Under Construction", which I assume is the default for a page that doesn't exist. This is why it seems as though the URLs are simply being interpretted erroneously.
This problem occurs when connecting both to the wireless and the wired internet at my hotel, and it occurs on both Safari and Firefox, so it is not a connection-specific or browser-specific problem. It may be a problem with the hotel's internet, and as of yet I have not had a chance to test the computer at another location. However, a colleague using an IBM computer has had no problems, and I am currently on a Samsung machine in the business center of the hotel and it is working correctly as well. I have searched extensively online for a similar problem but have come up empty handed, and more than anything, I am confused about what might be causing this problem. The strangest thing is that a fraction of the time, the internet functions normally, but it is usually roughly 15 minutes out of every hour, and eventually I am inevitably taken back to Jammin Beats.
I am a computer science graduate but I still have no idea what would cause this problem. At first I thought it might be a hacker, but if it is, he or she has been at it consistently for 3 days now, and only seems to be targeting my computer. Any ideas or solutions would be greatly appreciated, as I have been forced to resort to the hotel's business center for checking email, doing work, etc. Thanks in advance.I did consider that, as I was in Beijing last week and there are a number of censored sites. However, in Korea I have had problems with very basic sites like facebook, wall street journal, google, yahoo, Korean google, my hotel's webpage, etc. Further, I have successfully gotten all of these sites to load seemingly at random, and can access them without problems on other computers. The only disconnect seems to be between my MBP and the internet, not between Korean internet and the web. I have toyed around with the network settings, and although sometimes after switching from "Automatic" to a fixed connection I get some sites to work, it usually only lasts a short time and eventually the same sites stop working. I reset my cache regularly to make sure I'm not getting sent to cached sites, but this also doesn't help. Further, my Apple Mail, Skype and AIM accounts jump between being connected and disconnected randomly as well. Again, this is isolated to my own computer, which is why I'm so confused.
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Strange email problem; it started only loading unread emails, but from 3 months ago. It is now loading new emails too, but no emails in the past month, read or unread. It's gmail, set up through the phone, I've restarted restored and updated firmware, deleted the account, anything I could think of, but it's just not accurately downloading the most recent emails.
The answer is very simple: You were not the original owner of the phone. Target sold you a phone that had been returned. You can verify the date of the original sale here: Apple - Support - Check Your Service and Support Coverage. I suspect you will find that the warranty expiration date is not one year from the date that you bought it.
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Satelite l655 - s5094 - werid cooling fan problem
ok here the deal when my laptops is around 40 C the fan runs at 100% and as the temp rises it slows down to bare min and when the temp hits high then 70 C it gose back to 100 %. i got a colling pad but it barly helped. and fan control with speed fan out of the question unitll they support the laptop. if there a way to change the fan setting that would be great to know.
Satellite L655-S5146 Specifications
Satellite L655-S5146 Downloads
Heatsinks don't need to be changed. They need to be cleaned, which you've done.
It's not clear from your post, if your fan problems persisted after you cleaned it. If they have, sounds like the fan is failing to me.
Try one these. Got the part number from here. From your model's parts list here.
Please let us know how it works out. Good luck.
Mike -
Today, I powered my laptop and see the error BIOS 902, cooling fan problem. Then the laptop shutdown. However when I tried to power the laptop at third time, It can start up normally and I can use my laptop for more than 8 hours
I found the solution in google that upgrading the BIOS. However the error 902 still there. My laptop always start up normally at third time.
What should I do? Should I bring my laptop to warranty center?
Thanks for your advance!Please identify your notebook/pc .
Look at the base/rear/side of the notebook/pc at the barcoded sticker.
Post items numbered 1 and 2 on the following image. Your barcode may be slightly different but will still have the important imformation needed for us to help you.
###Do not post the serial number as it is personal information.###
Post the installed operating system version ( and whether it is 32 or 64-bit ) and whether the CPU is an AMD or Intel product
Not posting all of the information as requested will delay our responses and slow troubleshooting of the issue that led you to author a thread.
Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer -
IMac 27" (mid 2010): Will replacing the HD cause fan problems?
Hi,
I have an iMac 27" (mid 2010). My HD is broken, and I'd like to replace it. I've already installed an SSD, so replacing the HD shouldn't be much of a problem.
However I've read that replacing the HD causes the fan to spin up all the time. Some sites say this started one generation later, but some remain unspecific or say that this problem affects all iMacs. Before I replace my HD, I'd like to know what to expect.
So my question is: in my 2010 iMac, can I replace the HD without causing fan problems (provided I put the temp plug in the right place )?
Best regards,
FOWC is mistaken. I don't know why they keep saying that. (I'm not even certain the OWC blog linked above related to using the same make drive on the late 2009s was ever correct. I had a long phone conversation with an upper level WD tech some time ago who said that the originals were special ordered by Apple.) Those drives have Apple proprietary firmware which puts the temp sensor output to the jumper block, and you cannot just replace with a drive of the same manufacturer. A non-Apple WD drive will not have that connection at the jumper block.
Two possibilities: Get an external stick-on temp sensor that will work with your model or use SSD Fan Control.
http://exirion.net/ssdfanctrl/
If I'm mistaken and you do get it to work directly with a replacement WD drive I will be pleasantly surprised, since I have a Late 2009 which will need a new drive sooner or later. Please post back with your results. -
Return for Fan Problem (aka mooing)?
Has anyone actually returned their Macbook for the fans coming on and off (or "mooing")? If so, did you get a moo-free MB?
The mooing isn't too bad - and I have hope that software could fix it; but if there are Macbooks that don't moo, man, I would like one. However, no point in going thru the process if there is no possibility of getting a moo-free MB.
Thanks.There definitely ARE some that do not moo. Or if they do, they do it much softer. Last night I had a white one that, every 10 seconds, would moo. It was horrible. Even with my TV on, I could still hear that fan revv up and then revv right back down, then 10 seconds later the process would repeat itself. I certainly couldn't live with that. I'm a student and would surely be kicked out of class with a laptop that sounded like a zoo, lol.
So anyway, I returned it today (demanding an exchange). What got me is when I explained the moo'ing to the girl, she sounded surprised and that she'd never heard of the problem before. THEN she takes it in back for about 5 or so minutes and comes back out and persists my MacBook didn't have a fan problem. I told her the machine had to be running for about 15-20 mins before it would kick in. Well she's gets my exchange and then continues to tell me "they're supposed to do that." She said hers at home did it. She also even commented about the posts on these forums about it at that point, too. I was thinking, okay then why didn't you tell me that when I explained the problem? I have a feeling the manager told her to tell me that.
Well, I got my black one home today and have been using it for about an hour before work (while it charged), and now for almost 2 hours (running down the battery). I've only been using it lightly and my temp hasn't gotten higher than 60C even on AC power. Perhaps this is why it doesn't moo? My white last night was close to 70C (on light use) and the moo wouldn't quit.
Unfortunately, this one does whine (somewhat loud on AC power, but very very soft on battery). However, that is a non-issue because turning on bluetooth shuts it up right away, or using QuietMBP works also. Whine I can deal with, but there is no work around for the moo.
So, my advice, is yes, return these moo'ing MacBooks. Like others have said, the more returns they get back for this fan issue, the faster they will (should lol) correct it. There's no need in my eyes to sell a laptop that behaves such as some of these do. I do not pay well over a thousand dollars to have to sit in a zoo-like atmosphere. And that's exactly what I told the sales woman. A lot of times I sit in quiet and this fan noise is too loud to ignore. However, I really do believe this is tied to a heat issue, because it is clear some of these run much cooler on light use than others do. That must be why I haven't heard the fan on this one - my temp is much lower than the one I had that moo'ed. -
I have a new wrt54g and I have a strange signal problem. When I am in the house close to the router I only have a good signal (3 bars) but when I take the notebook outside or all the way in the back bedroom I have a excellent signal (5 bars). I am thinking that something in the house might be interfereing with the signal but I have tried changing the channel and still have only 3 bars when in the house, and 6 bars when I take the notebook outside or to the back bedroom. I am using wap but I tried disabling it and still only 3 bars when around the router.
Any thoughts, and thanks in advance.I tried it all but still the same but I did find this, when I take then computer in the back of the house or outside the signal goes up to excellent and stays there even if i take it back in the front of the house where I previously only had a good signal. But the only way to get a excellent signal is to take it far off from the router but once it does get a excellent signal it will stay there even when I take back around the router, crazy I know.
Any more advise or thoughts? -
MOVED: [Other 865 Series] mainboard fan problem
This topic has been moved to Mega PC series.
[Other 865 Series] mainboard fan problemthanks, I'll try it
Quote from: otrofox on 01-June-05, 05:31:44
Have a look to this thread and give it a try.
Take care with temps. After unplugging the sys fan, check your temps immediately and for a long time. Make some tests to ensure this fan is not needed in your Mega.
Another solution should be adding a resistor (from 20 to 80 Ohms) to low the revs. -
Strange connection problems -- software or hardware?
I've been experiencing some strange connectivity problems of late, and am wondering if it's a software or hardware issue. I'm running OS-X 10.4.11, and have noticed web-associated "drop-outs" occurring. When I'm browsing, any of the following will happen:
1. the pages will periodically stop loading, or will take forever to load a few final images.
2. the page will load with a different format (completely unformatted, like a throwback to Mosaic!).
3. the page won't load at all, and will instead give me either a "DNS error" message, or will default to my ISP's "We couldn't resolve your page" message.
4. Nothing out of the ordinary happens.
Throughout this process, the connection strength is 100%.
It seems this happens with both Firefox and Safari. Is this an issue with driver software, or is my Airport Card giving out? My computer is about 3 years old.I have been having intermittent connection problems on several computers over many years now. We have 12 eMacs, all purchased within a few months of each other, all with 10.4.11. Some computers have almost perfect internet connection, but some are constantly losing connection. If the user just waits a few minutes, the network just comes back or if they open system preferences and renew the DHCP lease it comes back as well. We have tried replacing cables, reloading the operating system, repairing permissions, reseting safari... We are all connecting through ethernet cables through wall jacks then to a switch that is connected to our router. Our DSL provider claims it can't be wiring or a problem on their end or they would see it and we would all have problems. I am not super computer literate... Any suggestions for what I should check on the 4 or so computers that are having lots of connection problems?
Thanks for any words of wisdom!!!
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