PowerPC :: Unexplained Freezes On G5 IMac
Jun 26, 2010
I've got a G5 iMac which is 5 years old now, it's got 2Gb RAM and 75Gb HD In the past couple of weeks it really slowed down and then it started having panic attacks and random freezes. It also crashed with a what appeared to be a wierd zig-zag pattern [see attached jpeg - this happens even when the log-inscreen is on] I hadn't installed any new applications or anything and it had been fine upto then. I've ran the hardware test a few times, which has said everything is fine: video, memory, logic board all passed. So I backed everything up, scrubbed the HD, installed a fresh system 10.4, which Software Upgrade then took upto 10.4.11; Installed some of the apps and put some data back on - but leaving about half of the HD empty The random crashes are happening more and more frequently, crashing, panic attacks and i am forced to do a hard restart every time Is there anyway out of this or is it a case of old machine, on its last legs and needing a new one?
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Jun 24, 2008
I have an iMac G5 that keeps freezing on me. It occurs more so when I use iTunes. The computer freezes and even the mouse turns off. I have to completely turn off and on the computer to get it working again. Could anyone tell me what it is? Virus?
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Jan 17, 2010
I apologize if I missed a similar problem, but i think this is an unusual thing. Ok, so occasionally after my uMBP has been on a while (say, 1.5+ days?) sometimes when doing little more than doing a little web browsing, I'll see in both Activity Monitor and iStats that i'm using about 60-70% of my processor, but there is no visible process that is taking up the CPU. the issue is temporarily resolved by logging out or restarting. Does anyone have any ideas? I've tried running what available malware scanners there are for the mac, but nothing has come up.
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Oct 17, 2009
I'm running 10.5.8 on a 3.06GHz Intel Core 2 Duo iMac. The machine often slows down dramatically and i can hear the internal drive going like crazy. When I look in Activity Monitor however there's nothing chewing up much CPU. I can see that there's a lot of disk activity going on however. Unfortunately I don't see anyway in activity monitor to see what processes are accessing the hard drive. Does anyone know of a way to track down what processes are accessing the disk?
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Oct 3, 2005
almost everytime I use airtunes, somewhere in the middle of a song, the music will quit unexpectedly. sometimes the music will resume in a three-count, sometimes longer, sometimes not at all. When i look at itunes, it looks like the song is just paused - meaning the little diamond that shows where you are in the song in the display along the top isn't inching along anymore, however the actual PAUSE button on the upper left has not been selected (meaning there is not a PLAY arrow displayed. the double bar PAUSE button is still showing). I have tried:
stopping the song (clicking the PAUSE button) and then starting it again
quitting itunes and restarting
restarting my ibook (G4)
unplugging my airport express and plugging it back in to reboot
using the airport admin aplication
completely unplugging EVERYTHING (modem, airport base station, airport extreme) and then slowly rebooting them all in order
upgrading itunes to the current version
at first, I thought it was a problem with airtunes, like the signal got lost or something, but after looking at itunes and realizing the song isn't *going* anymore, i thought the problem was with the application. but I don't know. I've never experienced this if i use the computer speakers, but then again, I hardly ever use them so I really don't know that for sure. oh, and I bought my airport base station *after* the airport express, and I'm pretty sure this problem was happening when my "network" was just my ibook and the express. (my experience level: I'm a former PC'er. I'm fairly knowlegable, but more on the software end. I know *nothing* when it comes to mac hardware.
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Jul 4, 2010
I you review this: [URL:...] you can see I have been dealing with this for a while. I am just about to run the apple hardware test again but I am hoping someone might have a new idea.
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Mar 9, 2010
I'm trying to diagnose problems with a friend's MacBook Air who due to language barriers cannot get help from the Apple Store. He has a Rev. A MacBook Air (with the 1.6GHz and 80GB HDD) and Snow Leopard. My friend is new at computers (this is his first computer) and only goes online to read the news, check the weather, travel research, etc. So the Air is the perfect machine for that. The issue started with a few weeks ago, he called me to ask me how to fix his internet. I wasn't sure where to start, but I suspected the Airport card. After testing the USB-to-Ethernet adapter which did not work, I figured it was something else. He told me everything gave him the "red" dot in Network Preferences (Well he didn't know to check there, as I had to tell him where to go). A PRAM reset fixed that which is good and he was able to go online again. Over the past few days he has called again because his computer would constantly freeze. At first it would be freezing and then it would work again after a few minutes. Sometimes it would just freeze and would require a forced shutdown (power button—5 seconds). Now of late it sometimes does not boot. I have been notified that it does boot past the gray screen, but stop right before when the desktop loads. Here is where it difficult: I do not know how to continue.
I can't have him run hardware tests off the Installation DVDs because he does not have an optical drive and even if he did, he would not be able to relay me the results of any test. I cannot have him take it to the Apple Store because well they wouldn't be able to speak his language). All my family friends come to me for computer help, so that's no good and his neighbors are well not Mac proficient and again call me for computer help. He does not email, text, send MMS, etc. So I can't even get the console files. I would like to suggest a Erase and Install, but again with no optical drive and the difficulty of explaining things over the phone—I don't think I can do it. Any one has suggestions on how to proceed? Maybe even what's wrong? The only thing I can think of is to give him my MacBook Air and have him give me his and then I can figure it out later, but that's a bit inconvenient (but I'm definitely willing to do that if that's the only solution).
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May 31, 2007
I've been having problems with my Power Mac G5 crashing. The first time it would crash at random, with the fans kicking into high gear the red LED coming on. Apple support had me do an archive an install, no help and then a clean install which didn't help either. I took it into the shop and they replaced the logic board, and tested it.I got the machine back today and after about 2 hours of usage it crashed again, but this time I got a weird screen that scrolled across the screen.I have attached a screenshot and video of the issue:[URL]
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Jul 14, 2008
Issues with my G5 DP 2GHZ. My rig has been fine since day one, but since I changed my system drive, and added a second drive, the fan radomly goes into a crazy high speed mode, and then locks up, requiring a hard shut down.
Heres the facts:
*my os is 10.4.9
*2.5 gb ram
*used carbon cloner to copy my original system disc to new Seagate 7200.11 1 TB drive
*installed second 1TB storage drive.
*both drives divided into 6 partitions.
*both drives formatted OS extended [Journaled]
*jumpers are in the correct position
*drive firmware is SD15, the correct, and most current
*drives are set to never go to sleep
*fan/freeze is not task specific, meaning it will lock up with no apps open
*this fan/freeze is sporadic, and has happened three times in the last 4 days.
Ive attached the system log.
I know nothing about these logs, so my apologies if Ive included too much, or not enough data.
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Dec 13, 2006
i'm having some old school os 8/9 crashes -- everything just freezes up. no kernal panic screen, i can't move the mouse, the keyboard doesn't even respond so i can't apple-ctrl-pwr to reboot, i have to hold down the power button to shut it off.
this is the second time it has happened in the past 2 weeks. any ideas?
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Apr 24, 2007
I have this Power Mac G5 and every now and then it'll freeze up, the fans will go full blast, and the screen will go black. It's not even when I put a heavy load on it.I usually just hold the power button down and do a hard shut down. Does anyone know why this G5 keeps doing this? Should I re-seat the ram and GPU?
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Jan 27, 2008
I have a G4 iBook - 1.07Ghz, 768Mb RAM, Panther - that keeps giving me the swirling beachball of death depending on the date setting on preferences. If I set the date to 2004 the machine runs fine, but if the date is set to today or (I'm not sure of the exact date) after 2007-ish the thing keeps freezing.
Also, after the freezing troubles I installed Ubuntu and it ran perfect with the correct post 2007 date.
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Aug 21, 2008
My computer crashed today and hasn't been able to boot back up since. It gets to the grey screen with the Apple logo and stops. The fan then ramps itself up to overdrive.
I've started it up in target disk mode and repaired it using Diskwarrior on my macbook. It had to repair quite a bit and then it showed up on the desktop of the laptop. I can read, write and pull from it. I then ejected the powermac and started it up again to find the same problem persisting.
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Nov 12, 2008
My computer, a Powermac G5, Dual 2.0Ghz, 1st Edition Released Oct 2003, will just freeze. It usually happens within 5 minutes of booting into the operating system. I am also unable to boot from the Leopard or Tiger DVD's to try and install a fresh copy of the OS as they freeze during the install. This is what I have tried so far, but to no avail:
Resetting the RAM and Graphics Card
Resetting the Power Management (PMU)
Resetting the PRAM
Now this is the even stranger thing. I installed a copy of PowerPC Ubuntu Linux 8.04 and it works fine. This makes me think that it is unlikely to be a hardware issue.
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Oct 5, 2007
My PowerBook G4 has been slowly dieing over the last couple of month, ever since I told it was going to get replaced with a MacBook Pro early next year (hopefully around MacWorld). The Airport signal is slowly decreasing and I'm in the same room as the wireless router, the mouse touchpad in parts is loosing sensitivity, there are randomly hard freezes of the system, etc.
But over the last couple of days I have noticed a strange noise coming from the fan (well that's guess), it sounds like its sighing, I know it sound ridiculous but it's the only thing it reminds me off. It comes and goes (the sighing) but it is constant and it's really starting to: 1) Freak me out that my computer could die and day, 2) Annoy me. I have a sound clip (.amr - also converted to .mov) does anyone know how i can upload it onto here or a link, so people can hear what I'm experiencing.
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Nov 4, 2008
I keep seeing my poor iMac G3 Blueberry freezing for no reason, I have 512MB of ram, but I don't think I can max it, and if I did, the processor and hard drive and gonna die soon, It just freezes, and sometimes the screen will not wake when I move the mouse or touch the keyboard.
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Nov 28, 2008
My beloved iBook 1.33 wont boot, has flashing? and freezes when I try to boot from original CD with a bunch of vertical lines. I ran the diagnostic DVD and it says Invalid memory access. I removed the external ram chip for computer and still get same error. I also zapped PRAM, reset NMVU (whatever it's called). I already have the iBooks case open and willing to try anything.
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May 4, 2009
I naively tried to install leopard OS on my 5-year old ibook G4 (with very little RAM). It makes a horrible clicking sound from the dvd drive and freezes on the screen that says its looking for OS 10.4(?) (which is not on the computer). When I reboot it immediately starts the install process, because the dvd is still stuck in the drive, and freezes over & over again.
All I want to do is remove the disc and go back to the original OS, so that I can add more RAM and update the OS properly. (The only motive for the update is so that I can have the same version of Garageband 2008 on both my desktop and laptop so I can work with the files interchangably.)
Is there a way to restart the computer that bypasses the install disc and dosen't default into the install porocess?
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Jun 7, 2010
Having built a hackintosh with my son, I've taken his old G5 1.6 to use as a desktop. Lovely being able to use dual screens, usefully quicker than my Powerbook G4 1.5 and generally quick enough to do the usual - mail, browsing etc.
Problem is, it's started freezing roughly once a day. No mouse or keyboard reaction, going into standby by using the monitor button doesn't help, the only thing to do is turn it off using the front panel button.
I put new RAM in a few months back and replaced the HDD when it died, so that stuff should all be OK. Any suggestions? I've run all the usual maintenance things via Onyx - permissions, logs, daily / weekly / monthly scripts and so on.
My big concern is obviously that I don't want it to just die on me; no way am I replacing the logic board if it goes.
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Apr 8, 2008
I have a newer iMac 24" bought in 11/2007. I have the mini-dvi to vga converter and when I connect it to a external tv capable of 1024x768, the iMac freezes and does nothing. I disconnect and the screen turns blue and the flickers back on and everything works. I have made the connection then booted up, and I have tried every resolution all the way down to 640x480, same thing it just locks up the screen, but again as soon as I unplug the mini-dvi to vga cable from the iMac it flicks to a blue screen and everything comes back. I have reviewed dmesg nothing, and revieiw /var/log/messages. Is there any troubleshooting I can do. I am old school unix/linux guy just converted my family to Apple and would like to use the display on my tv to watch my iTunes movies.
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Feb 11, 2006
I recently installed a new 250 GB hard drive in my 800MHZ emac. I did a nice clean install of 10.4 on it and all was going well. The problem is that it randomly freezes after about 10 or 20 minutes. Mouse locks up, keyboard doesn't work.I tried pinging it from another computer and there was no response. I hold the power button in to shut it down and when it reboots it works fine for a while and then freezes again. I checked the console and it had this:
Mac OS X Version 10.4 (Build 8A428) 2006-02-10 20:36:25 -0500 2006-02-10 20:36:26.072 loginwindow[84] FSResolveAliasWithMountFlags returned err = -1407
I ran the disk utilty checks and they come up clean. I have tried reinstalling os x with no luck.
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Oct 4, 2007
My girlfriend has a 17" G4 Powerbook - she recently bought it second hand. It's one of the late models, with a 1.67 GHz processor and 2GB of RAM installed. It runs like a dream, except for one thing - it has a propensity to freeze occasionally. They're not kernel panics - they're hard freezes, where everything locks up completely. Can't move the mouse, can't force quit, nothing - the only thing to do is switch off and on again. I've looked through the logs and can't find any crash reports, so I'm at a loss to what's causing this. The only lead I have is that it only seems to happen when the machine's running on battery - it's never frozen when the power cord's plugged in. I thought it might be overheating, but it froze this morning after only 5 mins of use, so now I'm stumped.
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Oct 2, 2006
I have a 1.8Ghz dual processor G5, 1GB Ram, 80GB HDD, with OS X 10.4.7 installed and all current updates, and today I was working on it and the fans on it slowly started speeding up, and then everything on the screen disappeared and a mesage appeared stating that a restart was required. After restarting everything seems to be working fine, but I'd like to know if this is a fluke or if I have a serious problem.
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Nov 30, 2007
recently my ibook keeps randomly locking up, it first started the other day when it got stuck on a blue screen at start-up eventually it came on, but kept locking up, no spinning beech ball just completely froze, i held down the power button to turn it off, i then had to wait at least ten minutes before trying to start up again, if i didn't it would get stuck on the blue screen, then something else weird happened, when i started up it came up with the mac set-up assistant similar to when you first upgrade, so i turned it off again and it went away, so i started up again this time i noticed that spotlight was indexing, despite it already doing that ages ago when i upgraded to leopard, so i thought this had something to do with it, because it kept freezing in the process, but today i turned it on, let it index and to my surprise it didn't lock up, so i went to play world of warcraft, and as soon as the login screen came up it locked up agai
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Aug 23, 2008
Fall 2005 PowerMac G5 dual 2.0Ghz with Leopard 10.5.4
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Aug 10, 2008
i have an ibook g4, and was using it just fine the other night, then when i came back to it a few minutes later it had shut off completely. now when i boot up, the computer freezes at the spinning gear startup screen or at the blank blue screen immediately after the spinning gear. it will boot in single user mode, but it won't boot up with my os x install disc. does anyone know any unix i could try to use to get my mac up and running again, or has anyone had this same problem and knows a fix for it?
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May 23, 2009
well where do i begin ?? basicly i purchased a ibook g4 14" 1.33ghz that had its harddrive upgraded by a apple service provider. About two weeks after this upgrade took place the harddrive started playing up and the machine would not see the boot volume on the drive when restarted or every now and then the machine would freeze after some time of use, a few hours maybe. i ran apple hardware test and it came back clean after zapping the pram and disk warrioring the drive it fixed this for a day then it started again oh well.
so i sent it back to the service provider who said yep its the hadrdrive goody !!! oh NO he calls back the next day and says the new harddrive is not reconized and that they tried a new ribbon cable WTF when i sent it in the machine saw the harddrive via target disk mode all the time it just didnt see the boot volume.
NOW his saying its the logicboard **** sake !!! so my question could this machines logicboard be fried when it was fine before i sent it in , i mean the ide controller was fine i checked it and now im faced with a brick !!!what do i do ????
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Apr 10, 2012
freezes very often imac
Info:
iMac (24-inch Early 2009), Mac OS X (10.7.3)
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Jan 6, 2011
I have a 3.06 Intel Core 2 Duo iMac with Snow Leopard. It is completely up-to-date and has always ran beautifully. I have not installed any new programs lately. Recently, when I go to APPLE > Restart (maybe after an update or just because I like to restart my computer on occasion) the bar at the top disappears, my dock stays up on the screen, and the computer just sits there and freezes up on me. I am forced to hold down the button on the back to get my computer back. Here are the things I have tried:Re-install of the latest update using Combo Update Reset PRAM Repaired Permissions Booted from disk and ran a Repair Disk Complete zero-out of the HD, clean install of Snow Leopard, and reinstallation of everything from a Time Machine backup Nothing has worked...The other problem is that it only happens when my computer is on for several days. If I restart daily, it doesn't happen. So, it makes it hard for me to log-in as a different user for that long to initiate the problem. I think it has something to do with a program that I may open and close throughout the week but I have no way to pinpoint what program it is.
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Nov 5, 2009
I recently had a hard drive failure in my imac which i replaced with the the samsung drive listed below and a fresh install of snow leopard. Now i am experiencing a problem when waking my mac from sleep. about 50% of the time when it wakes it will immediately freeze which can only be resolved by a reboot. Could this be caused by this new drive being a "green" drive that conserves more energy when asleep by going into a slower state than a typical drive or is this a software issue?
imac
2 ghz
4 g ram
Hard Drive
SAMSUNG HD154UI
1.5 t
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