PowerPC :: IMac G5 Failing To Boot Up - Fans Whirring Fast
Dec 16, 2008
Originally my iMac G5 (1.6 GHz 17 inch) was failing to boot up. It would get to the grey screen and the apple and it would just stay there and pretend to be a rocket ship with it's little fan whirring as fast as it could after five minutes. So I reset the SMU, fan stopped, still wouldn't boot. Booted it off the 10.5 install cd (which it was running fine until it wouldn't start up). It wouldn't see the Macintosh HD for a while unless you went to disc utility > partitions and changed it from current to one and instead of applying just let it sit there before switching it back to current. Took about 10 minutes of sitting there.
I did disk repair said there was no problem. Disk permission repair said there was a few problems and said it repaired them. To be safe I backed everything up using target disk mode (where the fan tried to play rocket again even though I reset the SMU), erased my hard drive and reinstalled. Now it shuts down randomly when it goes idle, and takes 10 minutes to start up past loading the dock to load the apple bar Mac HD icon and whatever is on the desktop (which is a single empty folder).
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Apr 26, 2009
I just picked up a G4 MDD off ebay. Everything seems to be working fine, and it passed tech tools tests for whatever that is worth. The only thing I noticed is that for about 2 or 3 seconds during boot the fans seem to rev up pretty high, then settle back to normal. Does anyone else with this computer have this issue or has anyone heard of it?
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Jul 28, 2009
The fans on my G5 Pro are running at close to 3000rpm most of the time. I have read other forums and do not think this is normal at all. I started looking into the fans because I am getting frequent kernel panics (black screen crashes) and thought it might be the machine over heating. My CPUs are at about 50C to 52C and the fans are constantly running that fast.
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Jul 13, 2010
the PRAM battery clearly is failing fast. After two assurances from a large local computer seller/repairer (Best Buy) that they could indeed go to her apartment, and after acquiring the correct battery for her, I have now found out that they won't go to her apartment because the computer is more than six years old. Dead end there! Does anyone know of a place in New York City (or an individual) that would both visit her apartment and be sufficiently conversant with the innards of such an old Mac that there would be a good chance that the battery will be replaced without harming the computer? There doesn't seem to be anything wrong with it besides the failing PRAM battery, but Barbara is willing to pay handsomely to have her baby fixed, even if it means having the person go over it with a fine-tooth comb and charging accordingly. The computer is extremely heavy, or I'd take it in to the Best Buy store myself, and though we could get it into a taxi (with help from a doorman), there is the problem of getting it into the store and downstairs, where the repair area is. I'm strong but probably, not strong enough to do it, and we don't know anyone who could help. Any thoughts? There are multitudes of repair places and individual repairers in NYC, and many who visit people's apartments, but we clearly need someone who knows very old iMacs intimately and is not afraid to approach the problem.
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Jul 13, 2010
This problem just started happening on my 2005 Power Mac G5 Dual 2.3Ghz Processors.
I activate sleep, and it refuses to wake up again. Then after a few minutes the fans slowly increase in speed until the computer begins to sound like an aeroplane taking off, at which point I'm forced to perform a forced shutdown.
I've resetted the PMU and it doesn't seem to have worked. It is fully up-to-date in Software Update and is running the latest version of OS X Leopard.
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Jan 1, 2011
Sometimes when I put the display to sleep, my imac's fans will spin really fast until I restart the computer.
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Mar 8, 2012
It started off as a wierd whirring noise. slosly got louder. now the macbook actually vibrates to it.
Info:
MacBook Pro, iOS 5.0.1
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Jun 1, 2010
I have a G3 Beige Minitower (233MHz model) that I recently upgraded with a A/V Personality card I got from a friend of mine. It booted with the new personality card just fine. Now I got a hold of a G3 450MHz ZIF processor card and I put it into my G3, swapping out the old 233MHz one. I also took off the red jumper block and put some jumpers in place for a 450MHz processor. (Thanks to MacAddict Issue 30 for the pinouts, see "Overclocking your G3"). Now I got it booting, chiming and the power light going green, but no video coming out of the onboard video card (that came with the machine). I also have another Hard Drive, a Ultra-Wide SCSI card and a USB card, all 3rd party.
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Mar 13, 2008
I have posted a question on the Apple site, I would like to get some input from the people here as well.I wont bother typing out the whole thing, much simpler to let you go have a quick read at the questions and solutions I have tried.
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Jan 3, 2009
I have an rev. A iMac G5 that was purchased in January of 2005. The applecare has long expired. However, in May of 2008 due to factory defect Apple replaced the logic board, power supply and super drive [URL]. In December 2008 after experiencing problems with my hard drive I took my computer to the apple store. There they said it was dying and it would be cheaper to replace it myself. After purchasing a seagate hdd [URL] my computer won't recognize it. It stays at the black screen while the power light glows. After a few minutes the fans kick in at full force. I tested the hdd in another iMac G5 rev. B and it works fine. Any ideas on what the problem is or how to resolve it?
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Dec 2, 2009
On pressing the power button on the back of my brand new iMac i5 (Bought in store on Nov 21st), the white screen appears after 5-7 seconds and then the boot time is incredibly fast since I have an SSD installed. But I'm disturbed now with the fact that the white screen takes such a long time and I was wondering if anyone else had a similar issue?
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Jun 23, 2009
My iMac seems to be a lot more noisier (a low humming noise, maybe the fans), than it was when I purchased it in a couple of months ago. When I first got it, it was the quietness and boot time which I was impressed with more than anything. Now it's noisier and boot times have doubled. I have noticed that the fans for for HD and CPU constantly spin at 1200rpm or more, with no applications open and as soon as I switch on my iMac.
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Jul 20, 2008
I got a white iMac G5 about a year ago. Everything has been working fine until recently when I started to notice that its REALLY SLOW. What I mean by this is that whenever I try to open an application, load my widgets or basically do anything, it is really slow and Im seeing A LOT of beach balls. Just as i started typing in the title for this tread, it gave me a beachball. This computer is not that old so it should still be running smoothly.
Does anyone know why this is happening?
btw: I have 1GB of RAM, but it still operate really slow when I only have a few application open.
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Jul 31, 2009
For the last couple of days my fans have been going crazy, spinning at 6200RPM non stop. I installed fan control last month but the issues just started. When I open up fan control it says my fan should be spinning at 4000RPM. I had smcFanControl installed before and its still installed. My bluetooth module over heated yesterday so I used SMC to rev up the fans. I don't know if that is the issue because it isn't running now. I'll try uninstalling that now.
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Aug 3, 2009
Anyone here know if the fans run less now? My Macbook 2.2Ghz fans run a lot and this things HOT a lot of times. Have the computers become cooler running now vs. then? I am interesting in upgrading, but my main concern is the heat. I just don't enjoy a private space heater here in the desert...
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Apr 10, 2010
So, I got a flashed ATI Radeon HD 4870 off eBay. It's running fine, but it revs for every little thing I do. Every time I scroll on a webpage...It's revving for every letter I type. The faster I type, the louder it gets. If I watch a video, it runs at high speed. The X1900 XT was quiet compared to this thing.It's like it's set to run the fan as high as it can for every little thing that happens. What do I do?
I also just tested it in WoW, and it was getting about 12FPS in Shattrath at full graphics. I think I remember my x1900 getting the same, if not better. Something's gotta be wrong. Now it's just constantly running its fans, and I'm not even doing anything. I'm on my Macbook. My Mac Pro is just sitting there, nothing but the Finder.I'm also not happy with the speed it renders video compared to my dinosaur x1900 XT. Not worth the upgrade. Could the ROM they flashed it with be bad?
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Jul 8, 2007
What is wrong with this picture? The fans are running out of control constantly. This machine is sooo loud. The power supply was just replaced, which did little/nothing. Reset all ram/etc.
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Sep 20, 2010
I just started a video chat on Skype and my MacBook fans started going and are now really loud. Just checked my processes and it said this: Fans are currently at 4550rpm but are now much quieter than when I started writing this.
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Sep 7, 2010
I'm worried about too much heat and wearing out fans in both the card and my Mac.Below are the conditions, but first:
-Is it normal for this kind of card to run ALL the time? How do I know if it's acting correctly?
-Given the heat and fan speed info below, are my Mac and internal drives OK?
-Am I risking any breakdowns? Due to heat or fans running too much... or?
-Do all graphics cards cause the fans to run like this? Is there a cooler card out there?
-Suggestions to lessen the heat effects... or for another alternative?
Condition:
MacPro Xeon / Dual 2.66 processor / 4 GB RAM
Radeon HD3870 Card in Bottom slot
E-Sata card in top slot.
No other cards installed
4 Terabyte Internal Drives
Temperatures (in fahrenheit): (via iStat widget)
HardDrives: 110 / 104 / 108 / 97
CPU A: 95
CPU B: 92
Expansion Slots: 95
Ambient: 76
Fan Speeds:
Exhaust: 599
CPU Fan: 499
Power Supply: 599
HD/Expansion: 501
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Apr 15, 2008
You know that electrical smell ... well that's what is coming from the cabinet in which I have my Mac. It's not pungent or burning, but it's there. It may just be the DSL modem that Verizon recently sent me because that did have an odor like that when we hooked it up. Most importantly though, the computer is making a whirring sound, almost like a heavy hum when it's turned on. As it runs it quiets down though. It isn't loud but it is noticeably there and it's been doing it for a long time. I'd say for about a year and nothing bad has happened .. yet. I'm just wondering if I should put any more money into it. It needs more RAM to put Tiger on it and run it more efficiently but that shouldn't be a problem. I just wonder if I should abandon ship or stick with it. It's been a great machine and isn't beat up at all. I've rarely used it over the years.
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Jul 3, 2009
My Mum has just turned on our family computer- an iMac G5, 1.9ghz 17" (first model with built in iSight).
It gets to the grey screen with the apple, with the loading icon below it, then after about a minute the fans turn out pretty loudly, and it goes no further, just stays on the grey screen.
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May 7, 2008
just received my new MP and noticed the same thing with the 08 Modell which is that the door sits slightly offset on the case meaning theres a little gap about 0,5mm between the closed door and the outer case.
Second my fans "boostA & boostB" are spinning at 1100rpm at idle I thought they should normally idle at around 800rpm? (I read at least)
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Apr 29, 2009
Yesterday I started my iMac G5 and after about 15 minutes, it froze. It's happened before but I can always move the mouse. This is the first time it has actually properly froze. After about 2 minutes, I got a very loud whirring noise. I left it for about 5 minutes and it didn't die down. It has now been left for about 24 hours with the occasional turn on to see if it's fixed. No joy. Now it won't even turn on.
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Apr 10, 2010
My MacBook 13" which was the current model when I bought it in September '08 decided after a normal shut down to not boot up the next time I tried. It gets as far as loading the grey apple symbol and then gets no further (no loading cog etc.
Naturally my first thought was to try to repair from my OSX install disc but when I booted from this the same problem occurred (the grey apple symbol, no further). The disc is definitely recognised by the disc drive and is displayed when I hold the option key on startup. I also tried using a friends OSX disc and the same problem occurred so I'm assuming it can't be the disc.
I have tried booting in safe mode, single user mode & verbose mode, none of which work although I am able to see where the script gets to in a safe mode boot by using the option that shows this .
The weirdest thing is that I have dual-boot set up with Ubuntu on my macbook and I can still boot to ubuntu fine, also all linux live discs I have tried in order to investigate the hard drive have had no trouble booting.
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May 10, 2012
Update 2012-002 on macbook pro. When rebooting,after 'successful' install, I now see a repeating cycle of Error = 19, unable to mount root. From my *nix perspective I fear the worst - that the boot sector (at a minimum) is hosed. I tried (running Lion 10.7.x) booting with the command key down - no joy. do not currently have my install disk (sadly, it's in storage, somewhere). I'm concerned about this. this is VERY unusual for an update. This is a relatively new drive (750GB drive installed about 8 months ago). At no point have I seen errors, and believe me, I look. Assuming the worst case is repartitioning? (ah for hte days of 'fdisk /mbr')
Info:
MacBook Pro (17-inch Core 2 Duo), Mac OS X (10.7.4)
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Jun 2, 2014
Problem: MBP frozen on boot up screen with Apple logo and turning gear (which freezes after a while aswell)
Solutions attempted: disk repair via custom recovery- disk utility, PRAM
Device: MacBook Pro 15" (early 2010) running 10.9
Additional info-
Never had any issue with the device and this seems to have happened all of a sudden. Installed an SSD a few months ago, and just realised the ssd did not have a recovery partition. However I connected my older hardrive via USB to access recovery which seemed to work fine.
NOTE: for the past few weeks, every now and then I was unable to power the device off and whenever this occurred, there seemed to be a few bugs (ie unable to empty thrash-error 50 and enable to increase/decrease volume/screen brightness). However, holding the power button and restarting it seemed to have fixed it.
Had the same issue but this time around MBP failed to boot up.
Info:
MacBook Pro, OS X Mavericks (10.9.3)
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Jun 22, 2010
Last night I heard a couple of clicks and my G5 OS X 10.4.11 Boot Drive became unresponsive, Shutdown. Was able to install System on 2nd Internal. Launched DiskWarrior, which found the bad drive and made Preview Directory. Before had a chance to copy all more clicking started, so Shutdown. This AM swapped the drives in the bays so The Bad Drive is now in the Lower Bay. However now Diskwarrior does not see the damaged Drive nor does Disk Utility.
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Jul 15, 2009
I have a Emac G4 1.24mhz which I bought from Ebay, to replace my sons old Imac G3 (He moaned he could not watch Iplayer on it)
The problem I have is that It will not install from the combo drive, the drive mounts any disc so I know it not the drive.
I know the hard drive good (80gb as it came from a Imac G3 which was running Panther 10.3.9 when I swapped the drives over the Emac booted but after a while it would freeze.
I have tried to reinstall Panther but if fails to recognise the cd from a straight cd boot ( when pressing �C� ) and only shows me the broken folder. The only disc the Emac boots from is my G5 IMac install disc but this will only allow me to reformat the drive.( which I have done)
I have also tried to boot from Target Mode using my Imac G5 via a new Firewire cable and the Emac fails to mount. I get the bouncing fire logo on the Emac but that is all.
I have tried to boot and inscert the cable at the same time but this has failed.
Would it be a firmware problem?
It is possible to boot the machine into linux so I could use this os but my son likes Mac OS and been using it since he was two
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Oct 14, 2007
I picked up this G4 (M6498, 17", 800/256/80HD) from a lady in her 80's whose son sent her a new G5, but I'm having trouble getting it to boot on HD or CD. When I turn it on all I get is a file icon alternating between mac face and "?". Boot from IMAC CD: same thing - I hear the CD track switching a few times periodically but that's it. Boot from OS9 Install CD: same thing. I'm not that familiar with iMac, although I've had a few other Mac machines on and off through the years AppleIIe, PowerMacG3). Any suggestions what to try next?
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Dec 25, 2008
I have a 700MHz iMac G3, which froze during DVD playback and it needed to be rebooted. Now it will not boot, the gray screen comes up with the loading circle, but it will just shut down after about a minute. I have reset the PRAM, PMU and it is running 10.4. No beeps or anything when it shuts down, it just turns off.
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