New Power Supply, Now Fans Won't Stop Running

Good evening.
About a week ago, my G5 went dead - no power at all. An Apple certified tech that I know came to my house yesterday to replace the power supply with one (600W version) that I ordered.
That got me up and running, but ever since then, ALL my fans have been running at high speeds nonstop. I looked to see if there is a firmware update and tried resetting the CUDA again - same results. Tried setting processor speed to reduced, even tried it on highest - same result. Only way I can get them to stop is to to the computer to sleep or shut it off. The fans were never like this before. Any ideas? This is quite bothersome. Thanks for your time.

Hi eightfifteen-
Greetings and welcome to the Apple Discussion boards
I would agree with samsara that the thermal calibration should be performed. It is also quite possible that a thermal sensor was somehow left disconnected and is causing one or two particular fans to spin out of control.
The tech that you know should have performed the calibration while checking to ensure that your system was operating correctly. Have the tech come back with the proper software tools and do not let this person leave until it is demonstrated to you that your system is working correctly.
Luck-
-DaddyPaycheck

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Installed Firware Update on my iMac, now the fan won't stop running.

I successfully installed the firmware update on my 20" Intel Core Duo 2 iMac. Everything was fine, it restarted all was working until I put it to sleep. This is when the fans came on and never turned off. I tried to reset the SMC by following the instructions to unplug everything and the power. I even left it overngiht unplugged. But now the fan is on high all of the time. It never even changes pitch like its stuck at one speed. I'm waiting for the applecare line to open at 9AM EST.
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Yes, I checked to make sure that the Firmware and EFI were the correct versions. We did an SMC reset, a PRAM reset etc. They replaced the iMac I just brought home a new machine. They couldn't figure out what was wrong with it either. The fan was running even after you put it to sleep. So they just replaced it. It will go into the refurbished line now.
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IMac: first won't turn on now fans won't stop

Hello,
My mother bought an iMac a year and a half ago. Today her imac wouldn't turn on, so I guided her over the phone on how to reset the SMC and the PRAM.
Now the iMac turns on and works apparently fine, but the fans are wild crazy.. working at max revs.
Since I'm away I can't check much of the hard itself so I'm working blind here, just what I can do thru remote control.
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have you tried this before resetting the SMC? http://support.apple.com/kb/TS1433
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I'd try uninstalling smcFanControl and then doing a SMC reset to set things back to normal.
http://support.apple.com/kb/HT3964
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I have the same issue with my 2012 iMac 2.7 Intel Core i5 21.5"
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Try running the Extended Apple Hardware Test to see if it has a hardware (thermal sensor or SMC) problem. It won't fix the problem, but it may help you understand and guide the service tech to the problem.

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ry resetting the SMC:
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I have a new Macbook Air and for the last few days the fan had run continuously, this is the first time it has ever run, and now it won't stop, the fan starts up as soon as I turn it on. The computer is not hot.Any ideas on how I can fix this please ?

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Hello dwb,
Here is the screen shot, just the top half, there are another 10 pages, but I guess this should enough for you to have an idea of waht is going on, bit small I am afraid. No, I don't have any apps setup to run when I open my computer, the kernel, varies between 290 and 305 per cent ish.
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Regard,
Beauty of Bath

Elite m9200t. Just quit working. Does not go into bios. new power supply - nothing but fans.

HP Elite M9200t
Windows 7 32-bit
Error Messages: None
No changes made to system.
I hit the turn-on button one morning and nothing happened. Looked in the case and was running except the case fan. No lights were on. I tested the power supply and it tested good. Tried again - nothing. Connected a new power supply and tried again; Lights worked and cpu fan worked, but no attempt at boot.
I have disconnected everything - same result.
Does this sound like a bad ASUS mortherboard?

Heather, the PSU for the first gen G5 iMacs and the ALS models are the same physical size, but the ALS PSU is an auto-switching 110-220v model. Nice to have, but not the cause of the problem if it is working correctly.
Is your first gen one of those effected by the Repair Extension Program? If so, you actually have 2 years on problems related to the PSU and video.
Give Apple a call back and see if they have any suggestions, but don't let them put you off as you are still within the warrantee.

Fans won't stop with new processor

I just had one of my dual processors changed out. I brought it home and turned it on. The fans will not stop running. I called the tech and was told that this is normal for about an hour? That was yesterday and the fans still run. Any ideas?

The techs should have run a thermal recalibration on the fans when they changed the processor. Sounds like they didn't do that. Take it back to them and have them perform that step.
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DC5750 New Power Supply Problems

I have a DC5750 (mini case). Everything is working fine with it. It comes with a 300W power supply. I am in the process of purchasing a new video card for it but the video card requires at least a 500W power supply. I purchased a Cooler Master Extreme Power Plus 550W PSU (http://www.coolermaster.com/products/product.php?act=detail&id=5888).
When I plug in the new power supply and turn on the PC the fans start to spin and then stop and the front power LED goes red and i get 9 continuous beeps followed by a couple of seconds of silence and then the pattern repeats itself. I have checked the HP website documentation for the DC5750 and it says that when you get these beeps to make sure that the correct voltage is set on the back of the PSU. I have made sure of this, it is set to 115V. There was also a long paragraph about the kind of power cord that you should use and I did use the one that came with the PSU and also the one that I was using before hand, but no still dice.
I have unplugged everything except the power to the motherboard when testing it and still nothing. I have sure that the 4-pin connector that goes from the PSU to the mobbo is labeled P3 to match the label on the motherboard. I tried putting in the old power supply and everything works like a charm again.
I read somewhere on these forums last night something about the CPU fan sensor and how some people had to trick their systems into thinking the power supply was putting out the same voltage as the original one. They did this by connecting two pins together but there was something about the fact that the pain had to be rated at 100ohms or something. I couldn't quite understand the solution and since it wasn't my same PC model and it was an old post I decided not to try anything of that sort just yet.
Like i said, the PC was running fine before and it is still running ok right now with the old power supply, I would like to upgrade the PSU though with the new 550W one. After i put the old PSU in i went back into the BIOS to see if there was anything related to the power supply that would stop it from booting but I didnt see anything relevant.
Does anyone have any ideas?
Thanks,
BD
Edit: I just tested the new PSU on a different system and it works just fine.
Message Edited by BSU Dude on 04-29-2009 08:38 AM

Do you remember that post about creatind a resistor connector to bypass? I have a fan not detected eror with my new PSU on the DC5750.

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

Problem with NEW H520 when installed new power supply & graphic card. Please help!

My H520 was working perfectly and was running FAST..especially when rebooting. ( It was AWESOME! )Then I installed a new power supply (Coolmax 400w) and a new graphic card (Sapphire Radeon HD6450) and then everything changed. Now my computer is booting very SLOWLY and all the programs are taking a long time to load too. I was getting a black screen for almost a full 2 minutes before the windows 8.0 screen would finally load up and then it hangs there for a few seconds and finally goes to the start screen in windows. But BEFORE I installed this new hardware, when I would reboot, I would see the Lenovo splash screen come up for a few short seconds and then it instantly went to the windows welcome screen. And even then I would barely have enough time to see the welcome screen before it instantly loaded into the windows start screen. Everything would load up fast on the desktop too and we'd be good to go. It all took about 30 SECONDS.
But now? It takes MINUTES to get everything going. After it FINALLY loads up (it takes almost 2 full minutes now!), everything hangs up. When you first click on the desktop, it takes a few seconds for all of the icons to pop up. Before I loaded the new hardware, everything loaded up instantly. I didn't even see the icons load because they were already there. But now I have to wait for them to load up before I can even see them. And it's like that with every program and web browser I try to use now. Everything hangs up at first and then finally loads. The programs work but they are sluggish.
So I uninstalled the new power supply and put back in the original 280w power supply and I took out the graphic card but it did no change. The machine is STILL running slow on everything it does and booting very slowly.
I have seen this problem mentioned elsewhere about Lenovo computers but there is never a solution. Please help! It took me a long time to save up for this computer and I have been babying it ever since. I will never be able to afford a new one or pay for tech repair. I need to fix this! I was so thrilled with this computer before the hardware upgrade. This is devastating to me that it is working so poorly now when all I was trying to do was upgrade it a little bit.    Now it's performing horribly and it's only 6 months old.
I ran a four hour test on the hard drive and it is fine. I ran all the system clean ups, optimizations, registry cleanups, windows disk cleaner, defragger and virus scans. Nothing is showing up as not working but there is CLEARLY a problem. It was never this slow.   And why is it STILL acting this slow even after I uninstalled all of the new hardware that made it start acting this way and went back to the original setup?
I'm trying to run a memory test on it now but the BIOS will NOT allow me to select another drive to boot from so I can't boot from the flash drive or CD drive to run the memory test. I have NO IDEA what to do next and I am starting to pull my hair out in frustration.
Please, is there anything that can be done to make it better again?
Any help would be HUGELY appreciated. Thank you!
Sincerely,
Jennifer

I totally give up!! I restored everything to the ORIGINAL state with drivers AND hardware and STILL everything is not working properly like it was BEFORE the upgrade.
So this has been the WORST experience with Tech support EVER!! I have spent DAYS on the phone for HOURS with these technicians and nobody seems to know what they are doing. They put me on hold every 10 minutes and are gone for 10 to 15 minutes and when they come back, they seem all set on a new solution but when you ask them questions about it, they have NO CLUE how to answer and then they put you on hold again. Nothing gets solved and after HOURS on the phone, I just tell them to stop because we are getting no where but running around in circles that make no sense. THIS A NIGHTMARE!!
So I totally gave up on being able to upgrade this machine. To any future buyers, I STRONGLY recommend you do all upgrading BEFORE you get it home for the first time. Make sure you have your power supply and graphic card INCLUDED before you bring it home or you're mostly likely going to have a NIGHTMARE upgrading it later.    Technical support is a HORROR STORY and expect to be WAITING for LOOOOONNNNG periods of time both ON THE PHONE and ONLINE and probably ending up with NO SOLUTION in the end.
I've VERY upset with how this turned out!! I'm just gonna have to deal with the fact that my computer is permenantly messed up and NOBODY AT LENOVO knows how to fix it. So I'm stuck.
I decided to send back the new power supply and the new graphic card because of this nightmare with tech support. I put everything back to the way it was when I bought the computer and it is STILL acting up!! I just want to revert it back to factory settings .. INCLUDING THE BIOS... but Lenovo said I have to send the WHOLE computer back to them to do that. All I can do from home is restore from a point in the hard drive and that's not enough. I need a TOTAL CLEAN INSTALL. Everything needs to be wiped out and reset, not just restored to a previous restore point. I've done this multiple times and all it does is erase all the programs and stuff I put on the computer. The drivers and other codes are still the same. And then bugs come up and things get all wonky. I NEVER HAD THIS PROBLEM BEFORE I TRIED TO UPGRADE IT!!
I am NOT comfortable with Lenovo's "solution". I do NOT want to send my computer back to them for them to reset it with factory disks ESPECIALLY when they stated that they are NOT responsible for any damage in transport or otherwise. I have to buy extra packaging to make sure it gets there safely. They told me to use the original box and packaging, that is the only way they can be sure it will get there safe. Who has the original stuffing SIX MONTHS LATER?!?! I don't want to be sending my computer across the country to get jostled all over the place and have that add to the slowness of the hardware because it was jostled.
Can't I reset it from home? Can they not send ME the disks instead of me sending my whole computer to them?
I'm so incredibly frustrated with this. I hope somebody answers quickly and that I don't have to wait DAYS to get a response again.
I absolutely LOVED my Lenovo computer! And then I tried to upgrade it. BIG MISTAKE!! Now everything is totally messed up and Lenovo's customer support for technical problems is HORRID!!
Somebody please help. This is driving me crazy with frustration and totally breaking my heart. It took me a VERY long time to save up for this computer and it was my most loved possession. It was a reward for a lot of hard times and now it's all broken and acting slow. And it's only 6 months old.
Is there a solution to this very frustrating problem?
I just want it to go back to the way it was before.
And is there a very low cost KNOWN TO WORK WITH THIS MACHINE upgraded graphic card and power supply? Is there a very specific brand and make? If so, could you let me know what it is in case I try to upgrade it again someday?
Thank you for your time and for reading this!
Please have a FANTASTIC day today!!
~Jennifer~

New Power Supply, Now Fans Won't Stop Running

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