PowerPC :: IMac G5 (Non-iSight) Won't Start / System Freezing
Aug 18, 2009
A friend of mine has a G5 iMac that won't start. When you press the powerkey it tries to start, the power light glows, the screen goes grey and after a while the fans start whirring. Occasionally (twice in the past couple of days) it has started up, but it froze after a while. Other times the apple logo appears and the gear wheel starts turning but then it freezes.
I have tried booting from DVD, holding down the shift key and have taken the back off and pressed the wee button on the board.
Since my friend has the same model of iMac as me (they were bought at he same time and place) i tried the RAM that I took out of mine when I upgraded.
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Feb 7, 2009
Have been searching all over for My 20" iSight G5 iMac won't start.
Already tried:Removing power cord Using other power cord Inserting power cord while holding down power button Holding power button for 6 secs+ Plugging cord to wall outlet Begging and praying to the mighty white apple.
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Aug 10, 2009
i have an imac here which won't start when i push the power button. nothing happens. there is no noise, no fan, no flashing on screen or something else. i already opend it and checked the 4 LEDs on the logicboard. nothing to see there too. the only thing i noticed is, when i connect the power supply i hear an short noise coming from the PSU, i think and one (i think the first) LED flashes one time. also tried to push the internal power button, without success. noticed NO exploded or damaged capacitors on PSU and Logicboard (but i think thas more a problem of older G5).
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May 16, 2010
I have an iMac G5 iSight. When the power button is pressed there is no sound and a white light flashes, but nothing else happens. I tried the power reset method and replaced the power supply, but the same thing happens. The white light just keeps flashing.
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Oct 5, 2007
So I've got my mothers aluminium 12" Powerbook here because there were some troubles with it, it was freezing, made strange clicking noises on the left side (like 20 times every time she tried to restart) and eventually wouldn't start up anymore. So I guess there must be something wrong with the harddrive .
What is the best strategy to try to save as much data as possible? I have the original OS X 10.3.4 installation disks, I have an external hard drive to write the users data folder to. Do I just slide in the install disk while starting up (I mean I can't slide in the disk while it's off can I?) and will I be able to attach the external drive in order to copy the files?
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Apr 30, 2009
According to the Guides section of the forum, the built in iSight cams use a USB bus connection to the system. Has anyone ever "harvested" the iSight from broken iMacs or MacBooks and wired them for external use? I would imagine that they'd make great fixed focus surveillance cams.
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Jul 19, 2007
I am a proud owner of a MAC powerbook G4 for just over 3 years now. It runs MAc OX 10.3. For the last two weeks i have been having issues. First it started to be very slow. Then it would not boot up and i got a blue screen. I ran the file system checks from the OS X and it complained about the volume being bad and said it could not be repaired. i decided to reinstall the whole thing and did a complete erase and install. IT booted up fine. The software updater asked permission to update which i agreed.
After the update was over, the software updater had more updates. I guessed that it was probably giving me updates in the chronological order. During a particular update, it gave the blue screen and "please restart" ... and when i rebooted it did not come up... just a blue screen... i verified the filesystem using the diagnostic tool and it again said it was corrupt .... I have done this twice now and i have a feeling it happened when i was updating the same batch of software updates.... sometimes my software updater would crash everytime i launch it.....
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Nov 4, 2009
I purchased the last generation iMac G5 when it came out a few years ago and I recently tried to sell it. I sent the item to the buyer and he said it would not start. The Apple logo or for that matter anything would not come up. He brought it to the Geek Squad at Best Buy and they said it was an issue that would most likely cost over $500 in repairs. I just got the computer back in the mail and all that happens when the power button is pressed is the white light on the front lower right hand corner comes on for a second, then the machine shuts down. You can also hear the machine begin to start for about two seconds, then it shuts down. Any ideas as to the problem and whether it is fixable without expensive repair costs?
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Dec 6, 2009
My mother's iMac G5 began this just two days ago. It turns on fine, but once is reaches the apple logo with the spinning wheel, the screen begins to exhibit what is shown in the pictures below. It first started when I opened an .AVI I received in an email from my uncle. When the file opened, the whole screen(within about 2 seconds) had discoloration and macro blocking spread from the center of the screen outward. After this I rebooted, tried again, and when I opened the file, it did the same thing. Now I can not even reach the log in screen. And after the screen has been in this state for a while, it may go blank and the fans run at full blast. I've opened the same file on a PowerMac G5 and a MacBook Pro with no problems.
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Jan 22, 2010
I've recently been having problems with my iMac G5 iSight after downloading iTunes 9. After a series of freeze-ups, i noticed a visual anomaly appear on my screen. Little hash-marks all over the display were present, and playing DVDs or iTunes visualizer would result in a checkerboard pattern. After doing some research, I found out this was a logic board problem, and it was not uncommon for iMac G5s. However, I kept using my computer for a few more months when it then started freezing two minutes after boot up. I figured it was time to open up the computer and take a look. But after spending the 3.5 hours opening the machine, removing all of the cables and screws, I couldn't find any visible damage on the board. No swollen capacitors like everyone was complaining about. The only strange thing I saw was some discoloration on a few circuits near the USB and Firewire outlets.
I've decided to replace the logic board myself for around $370, and I was wondering about a few things.
1. Would the new logic board come with a processor, or would I need to pry it off of my old one, and re-attach it?
2. Would I need to go through a lot of re-programing and software issues if I replaced my logic board, or would it just start running right off the bat after replacing it?
3. Is this operation worth it? Because I have come to like my iMac after 5 years of use, and I would like to know if fixing it would give me a decent amount of usage before I would simply need to replace it
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Aug 30, 2006
At work, we have a 17" G5 iMac from back before the iSight was put in. We're an Apple shop, so we have the new iMac actually on the floor for people to try out. The old G5 this thread is addressing is up on a shelf, but we want to turn it on as a display model. We plug a temporary mouse and keyboard into it, but the machine never gets past the white Apple screen with the "I'm thinking" animation. After a minute or two, the fan turns on full blast, but the white screen remains without any signs of moving on. What is our problem?
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Feb 25, 2010
I've got a 20" 2.1GHz iMac G5 iSight on my bench that doesn't power up.
I've tracked down the issue to a grenaded IC on the logic board.
The IC is an 8 pin SOIC chip, to the right of the power connector, just above the ALS connector. It is labeled UE300.
If you know what this guy is, can send me a good picture of one, or can provide me with the numbers from the IC, I can get this mac back to life.
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Jul 21, 2006
I have an old iMac Rev A (or B?) and it is constantly freezing. It freezes in OS 8, 9, and 10.3.. but most frustrating is that it also freezes while trying to install an OS. So right now it does not have an OS installed because of that. It will not boot up to my OS 9.1 disc.. but it will boot up to it's original 8.5 disc and a 10.3 disc.. However it always freezes near the beginning of the install process (often before it even writes to the HDD). I tried taking out the old RAM and leaving it with just the one (new) 256MB chip and that didn't work.
It was freezing before with only the old RAM so. I guess it's not the RAM. I have an identical iMac that doesn't choke on anything (never freezes) and it only has 96MB of RAM. I don't know what else I can do. I'm trying to use XPostFacto to put 10.4 on this thing (it's possible, I want to try it out at least) but it won't get through the first OS install and if it does, it won't get through the second (10.4). Even more frustrating is that I don't have any diagnostic software such as the Apple Hardware Test because the original iMac didn't come with any.
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Sep 5, 2010
PC user for a number of years. Made the jump to Apple; received my iMac Saturday. Started using it, but don't really know how to navigate.Also, during the initial start up, I took a picture when it asked if I wanted to do one. Where is it in the computer? I would like to edit it.
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Feb 12, 2007
Brother in laws imac g4 laptop does not start up. Is there a way to key command the computer to start up as a hard drive so we can save the data on his desk top?
He of course did not save the disks that came with his computer.
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Nov 10, 2010
I have a PowerPC Imac. I have OS 10.4.11 installed on it. Today I started it up and it was working fine, however it froze while trying to load Photoshop. I had to force shut down and when I tried to reboot, I got a flashing folder and question mark. I have tried running Disk Utility, but it gets stuck at the Gathering Disk Information stage. I have tried resetting the PRAM (I think that's what it's called). It won't let me start up in safe mode or single-use mode. When I try to specify a startup disk, my hard drive is not listed.
What do I do? Is there any way to salvage this? My biggest concern are my pictures of my family that I unfortunately have not backed up.
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Aug 13, 2010
So, I had read a few posts from various sites about how a problematic iSight (one that didn't show up in system profiler) could be possibly caused by a loose cable. The guides reported finding a loose connection in the iSight cable behind the bezel. They reported opening up their MBs and successfully getting behind there for the fix.
I thought I'd be okay opening up my 15" MBP to see if my iSight dilemma could be cured in the same way. I used this guide:
to get to the cable. I did skip a number of steps immediately following the detachment of the bezel; going directly to the upper iSight area simply disconnecting and then reconnecting the cable. This seems OK because the guide is for replacing the entire cable itself; whereas I just wanted to check the top connection.
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Jan 25, 2007
My parents recently bought an iMac. Yesterday my mom was playing a game when the computer froze. Neither force quit or holding the power button was doing anything so in her frustration she unplugged the system. Today, after plugging in the system again, it won't turn on.
I press the power button on the side of the wireless keyboard and the green light on the keyboard turns on for about 3 sec and then starts flashing. No fans start up and the screen does nothing.
Information:
iMac and Macbook Pro
Mac OS X (10.6.3)
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Jun 19, 2008
A couple of nights ago I set my iMac G3 (Blueberry) to stop automatic login at start up and put it to sleep. I did this because I didn't want my kids on the web in the middle of the night while I was sleeping. When morning comes, the computer is off. I try to start it but it won't turn over. When I push the on button, the button flashes on for a split second and I hear the crackle of static as if the computer is starting, but nothing happens after that. I tried plugging and unplugging the computer, but nothing helps.
It's like a car that won't turn over.
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Oct 27, 2009
I am currently experiencing problems booting up my imac 17-inch, 1.6GHz (2004 model I think). When I hit the power button the machine starts but the screen rmains black and after about 3 mins of this, the fan goes into overdrive! The only way I can turn the computer on at the moment is to remove the casing and use the on switch located inside the the machine, although this is no guarantee it will work, sometimes it does but the majority of times it will be the same black screen as before. All I am waiting to hear is the part in the top corner (hard drive~?) to click into gear and then it's fine, and the machine seems to work perfectly. But this is not a solution and I fear it is only a matter of time before the machine just explodes altogether
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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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Oct 6, 2010
Just got ahold of a iMac g3, 450mhz, 20gb hd, and 192mb of ram, (+airport +combo drive) what would be the best operating system I could put on here that would run normally?
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Apr 2, 2009
I have an old iMac G4 sitting in a box, to be honest it's probably not worth anything, I've seen them online So I'm looking to maybe give it away to somebody that just wants the internet and iTunes, etc.
I want to do a fresh installation of the operating system, so it's nice and clean for the next owner, but I don't have the disks for it, anymore!
1 - At the moment, it has OS X 10.3.9 on it, can I put Leopard 10.5.4 on it?
2 - If not what OS can I put on it, and how do I clean it up without the disks?
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Feb 3, 2009
this morning my iSight was working...and now, a few hours later it is not. is there anywhere i can go to look at this? i tried looking in the system profiler and didn't find anything.
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May 8, 2010
my built-in iSight has failed very often during Skype video calls. More specifically, let's say I'm in a video call and I'm showing my webcam to the other person. It works for many minutes, and then I pause the call. As soon as I pause it, I get a message saying something like "no video camera detected, make sure it's plugged in", and from then on my system acts as if there were no iSight installed even if I un-pause the call.If I then go to any other application that makes use of iSight, like Photo Booth for example, it says that there is no camera installed on the system, with a crossed-out camera icon and a black screen in place of the video.
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Apr 17, 2012
my imac keeps freezing on the white boot up sceen where the apple logo usually appears. But the apple logo does not appear also the computer doesnt go beyond this point just fresses.
Info:
iMac (27-inch Late 2009), Mac OS X (10.7.3)
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Sep 5, 2014
all my docks are shaking and it seems like the my mac keeps freezing when it starts up but i already deleted autocad.
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Jan 28, 2010
I have an out-of-warranty 2005 iMac G5 running OS X 10.5 in my bedroom. The screen is very unreliable to the point where it stayed off all the time or gave weird colors and I had to purchase an external monitor (via mini-VGA). I have installed (successfully) spanning tools to allow both extended desktop (2 dual monitors) and mirrored display (2 monitors showing same thing).
However, after hooking up the external display, the iMac's bright display lights up my bedroom. I want to turn OFF my built-in display (i.e. no backlight) and have my external monitor act as my main display --- avoids having two displays eating electricity. Is this possible? (using any Terminal commands?) I don't want the computer to sleep, just to turn off the main display (even manually removing wires will work, if I can find a how-to guide on this!)
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May 23, 2012
Im new to macs compared to most, 27-inch, Late 2009 imac, freezing at start up on grey screen Software Mac OS X Lion 10.7.4 (11E53)I have tried booting in safe mode, verified disk-goodverified disk permissions and repaired disk permissions called tech support restarted holding command r and did the same thing again, well computer worked for 1 day and now freezing again, and it will not let me command R right after turning the mac on.
Info:
iMac, Mac OS X (10.7.4)
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Jun 28, 2014
After connecting the imac to a new router the system hung completely up. After each input, e.g. opening preview or a browser, the coloured turning disc appeared and nothing happened anymore. Several restarts, also in safe mode, were unsuccessful. I could not switch to another user. Restart is only possible at all from installation disc but thereafter problem remains the same.
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