Powermac mdd fan problems

the fan in my powermac g4 just gives up on cooling the prosseser after 5-10 mins my prosseser temp is 137-140 degrees ferenhight the fan will rev up full sped the it will just give up

Well, im not sure if i disabled it or enabled it i entered this EXACT command hwprefs cpu_nap=1 and now my cpu runs ALOT COOLER

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PowerMac G5 Dual 2.0 fan problem

I just bought a Powermac G5 dual 2.0 (June 2004) with 4GB (aftermarket) RAM on eBay that has the 'constant on' fan problem. I have run every series of tests and tricks that I found on the internet and it is still stuck. The machine runs flawlessly, all benchmark tests that I have performed have been completed successfully. In addition, I have done the following:
The door/deflector sensors are working properly, no red LED on the board
I ran all of the OF and OSX ASD 2.5.7 tests on it and they came back clean.
I reset the PRAM, the SMU, PMU and did the NVRAM resets in OF.
I repaired the disk permissions
I reseated the video card
The machine is spotlessly clean inside
All temperature sensors are functioning properly, and the Dashboard thermal readouts I downloaded show the temps are well within normal parameters.
I zeroed the HD and installed a fresh copy of OSX10.5
Nothing I have done has affected the problem at all... Does anyone have any suggestions on what else I can try to solve this problem?
Thanks,
Joe

I'm sorry nothing worked. I should have known you would have tried those things. The thing about tiger and fan issues I heard about just a few days ago. You saw which versions were fixed and unfixed though right? Right. Reduced power does nothing too I guess. And turning off sleep. It just doesn't sound like the Jet Sounds that other users have reported regarding their fans and sleep or where the fans go into Panic mode to cool the CPU Temps. Speaking of which I recommend Temperature Monitor to see just what temps you're running at. If they are too high that might be the one explanation.
And one wise Mac forum guru from Japan said something to the effect that most fan issues had something to do with USB problems. I hope he'll chime in, he's very good.
What else... false sensor readings? I have no clue as to where they really are to fix.
I sympathize because I've had fan problems of my own since I bought this mac used about two years ago. Loud revving up and down on Highest power setting... sounds like a demented banshee. Luckily I can just run on reduced power and it keeps the worst at bay.
The Mac I had before this one was a Dual 2.0 like yours. It was a rock solid performer for several years before I put leopard on it. Within a week it was dead as a doornail.
Well I think I've exhausted my ideas on this one. I'll keep thinking about it though. Oh, two more. The first, some kind of cool enclosure that muffles the sound without killing your Mac. The second, and what would be my preferred method if I was rich, would involve a very large hammer and...
Anyway, I really hope you solve this, Joe. If you do, post back and let me know how you did it.
Ack, looking back at your original post I see you already did some of the things above. Sorry, it's late and I'm too tired to edit.
Ok, one last thing I don't think you said but just occurred to me. Have you looked under the cpu cover to see if anything is amiss there?
That's it, I'm spent for now.
Good luck.
Steve

G4 MDD Logic Board or fan problem ?

I recently posted thinking my problem was a dead battery.
I replaced the battery and still had the problem.
here's what happens:
Once the G4 MDD is powered up and heats up, the fan comes on and stays on high speed. Eventually it sends the G4 into sleep mode.
Once this happens, I can't wake it up or power it down, unless I pull the power cord.
After replacing the battery, I reset the PRAM. no luck.
I also tried resetting the PMU, no luck.
I think there is something wrong with the logic board or the other fan (the one directed at the heat sync).
The heat sync is extremely hot, and the larger fan that is directed at the heat sync does not turn on.
I just found this article when I did a search for power mac G4 fan: http://docs.info.apple.com/article.html?artnum=95038
in that article, it mentions 2 LED's that should be either both on or both off, and there is only one of these LED's that is lit.
<1. Power Macintosh G4 (PCI Graphics): Check LEDs DS7 and DS8 on the logic board. In a working unit, these LEDs should be in sync with each other: both on or both off. If one LED is on and the other is off, there is a problem.>
any idea what this means ?
Is it a fan problem, or a logic board problem ?
This G4 was in storage for 5 months during a move, if that clues anyone in to what is going on.
thanks in advance for any ideas,
Steve

Hi
If it were me I start by assuming it's a simple problem with the fan as it would be the easiest and cheapest thing to replace. It should be spinning to expel the hot air around the heat sink fins out of the back of the case. I expect the computer reaches a certain temperature and goes into sleep mode automatically to prevent any permanent damage to the hardware.
Replacement instructions can be found here:
http://www.info.apple.com/usen/cip/pdf/g4mdd/g4mdd-lowerfan.pdf
I'd start by checking the fan's power connector is still fully seated and the fan isn't clogged up by dust etc. You could also try giving it a help in hand by giving it a spin with the point of a biro to see whether it's just sticking.
I'm not sure how relevant the article you linked is, as if refers to a much older model and I think it's only applicable if the computer is completely dead, i.e. no power and no fan movement.

PowerMac MDD freeze seconds after start

Hello,
I have problems with my PowerMac MDD since months, I tried lot of things, but now it's getting worse and worse.
It used to freeze without warning (mostly with Safari), I tried to change to Fireforks with no luck.
It then freezed more often, I take back the memory chip that the previous owner added, I disconnected the mouse from the keyboard, added a new generic usb mouse directly in the USB port, nothing.
Now, after two kernel panics, my Mac freeze slowly within seconds, minutes eventually when I login with a new user account, even if I don't launch anything, and with ethernet unplugged (no internet).
The last time, they where lines of tiny dots visible in the logging window, and in finders window.
The processor has been changed if it is important, it's a Gigadesign G-celerator 2xPPC G4 1,42GHz.
I suspect a hardware problem, but I can't imagine what is wrong...
Thanks for any advise,
Antilog
PowerMac MDD Mac OS X (10.4.8)

OK, I tried all the test on Dr Smokes Page, and this is the same.
I tested even open firmware
set-defaults
reset-nvram
reset-all
It helped me maintaining my mac alive for enough time to copy the panic.log on an usb-key.
So here's the log (sent with the help of a PC!)
Sat Nov 18 15:53:42 2006
panic(cpu 1 caller 0x000A50C8): simple lock (0x0038CFD4) deadlock detection, pc=0x0003D754
Latest stack backtrace for cpu 1:
Backtrace:
0x00095718 0x00095C30 0x0002683C 0x000A50C8 0x0003D754 0x000B4654 0x000ADDD4 0x000AC348
Proceeding back via exception chain:
Exception state (sv=0x20FA5500)
PC=0x00033DE8; MSR=0x00009030; DAR=0x01294000; DSISR=0x42000000; LR=0x00033DE8; R1=0x0CF93E30; XCP=0x00000024 (0x900 - Decrementer)
Backtrace:
0x00033D90 0x000A9914
Exception state (sv=0x2094E000)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.7.0: Fri May 26 15:20:53 PDT 2006; root:xnu-792.6.76.obj~1/RELEASE_PPC
Is there something interresting in this log?
Thanks for your help

PowerMac MDD 1.25 Dual G4 won't start..

Abruptly this PowerMac MDD 1.25Ghz Dual G4 won't start up. The button lights up, but there is no other reaction from the PowerMac. I have already reset the PMU on the logic board. I have replaced the CMOS battery. I removed the hard drive and copied important data off it. Any other suggestions before taking it to my local Authorized Apple Repair Station.

wouldn't it be more prudent to just replace the "wind tunnel" power supple
As a matter of troubleshooting, no.
After testing and confirming, yes.
Used and refurbished power supplies are available on eBay.
The 360W MDD PSU, having revamped fans, is the desireable one.
I'm thinking of just taking it in and have them check it out.
A third party repair service might be fine. Apple will just say it's too old.
I'm sure I can replace the power supply myself.
http://www.youtube.com/watch?v=uEfNH1DaJUo
Where is this capacitor located? inside the power supply?
Inside, where it is very dangerous for the non-trained to access and repair.
PSU components hold deadly charges long after they are unplugged.
Read more on some of the possible faults:
http://www.badcaps.net/forum/showthread.php?t=7165
Pro repair service here:
http://www.galaxyhp.com/
and here:
http://natramelec.com/g4powersupply/

How large a hard drive can stock PowerMac MDD take?

It's me again. Great forum -- thanks.
I want to install a 160GB HDD in my PowerMac MDD. Do I need a special PCI controller card or will the onboard controller work for this capacity HDD? Thanks.

Interesting little app. -- Coconut Identity Card.
But when it first launched and automatically determined a date and origin, it was way off -- 2005 and China. So, I clicked on the "Custom" tab, and manually (will not let you paste) put the serial number in. Then it gave me a more realistic date and origin -- Nov. 2002 and Sacramento, USA.
Looks like my MDD passes the June, 2002 cut-off date. Thanks!

Mid 2009 macbook pro battery is dead and fan is constantly ramped up (not due to heat). Would installing a new battery fix the fan problem?

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.

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

BIOS 902 cooling fan problem

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,
F

OWC 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.

MOVED: [Other 865 Series] mainboard fan problem

This topic has been moved to Mega PC series.
[Other 865 Series] mainboard fan problem

thanks, 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.

Notebook fan problem

Hi,
I've had my laptop for 2 years now, my laptop: Compaq Presario CQ60 Notebook PC, has a fan problem. My fan stopped working when I turn on my laptop. After using my laptop for a while (when it starts to turn overheat), my fan kicks in and only works for exactly one hour, after the hour, my fan turns off. While the fan is on, it cools down my laptop. My fan won't working again until a couple hours later or when I restart my laptop and wait for it to overheat again.
Can anyone help me with this problem?

If you just bought it and it's only a few months old then it should be covered for a replacement. You shouldn't be forced to buy a new one, HP should give you one to make it right.
I hear you, if you are busy you don't have time but don't let them swindle you. At least give the computer to someone who does have time and tell them to do a web chat the warranty people and explain that it runs at 98 C (or over 200 F) and that it needs to be replaced and could have burned you. Do this before the warranty period is gone. I think new computers come with a year warranty.
I say webchat because it is easier to keep a record of who you have spoken with and what they say in case they try to weasel out of replacing it. If they give you any trouble about it, post the log or send it to me in a message and I will tell you how to deal with them.
For several months I had to send emails back and forth and go through three years of receipts to get them to honor a warranty and I saved the logs of our chats and I know every sneaky trick they use to try and deny people service.

T5220 Fan problem

Hi,
sorry if this is the wrong forum.
We have a T5220 in the office, yesterday this message appeared
"Jan 30 12:34:06 T5220 SC Alert: [ID 118048 daemon.alert] IPMI | critical: ID = fc14 : 01/30/2009 : 12:33:06 : Fan : /FB0/FM0/F0/TACH : Lower Non-recoverable going low : reading 1600 < threshold 2400 RPM"
Could anyone shed a bit more light on this? It's obviously a fan problem but will it need to be replaced?
Thanks,
Paul

I would have the fan replaced. The fact that it is spinning way under speed is an issue as these very compact boxes require forced airflow.

Macbook fan problem?!

Hi. Just today I have had several random shutdowns. Had the Macbook for 10months now and it's been brilliant so I was a tad surprised when it started playing me up!
After a few looks on google it seems lots of people experience this problem with different reasons for it. I first thought it was the system fan as it did seem very hot but the fan hadn't kicked in. I tested the fan but I got a reading of 0rpm. SO I then ran the Hardware test and got the following error message:
4MOT/1/40000002 :Exhaust
So, I'm deffo thinking it's a fan problem and the CPU is shutting down cos of the heat. Now, I did not buy the extended warranty but I have checked with my serial number and have until Feb 2008 on the standard 12month warranty - my next step is to contact Apple to see what they will do. Does anyone know whether I am assuming correctly and if they know what Apple may do for me?!?!
Thanks

smorg99 wrote:
Would it deffo be the logic board then?
deffo?
I have no idea if it is the logic board or not. I know that Macbooks do not have many serviceable parts. To get to that fan may be a major undertaking. Typically, they want to get the unit repaired and back to the customer as soon as possible. They will swap out what they can do the fastest and diagnose and fix the actual broken part on their own time (or just toss it in the trash). But, of couse, I am just guessing.
How long would it take to replace this?!?
I have no idea.
Can't believe it - I love this notebook!!!
It is not as if you have many options. It will be a paperweight soon. They are machines and all machines break eventually. Either you have the misfortune to have one that isn't perfect or the good luck to have it break while the warranty is valid.

Powermac mdd fan problems

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