IMac G5 not turning on

Hi everyone,
I have a 2 year old iMac G5 (17 inch) and I was gone at a wedding this past weekend. When I got back home, my iMac would not turn on. I tried resetting the surge protector, even plugging it directly into an outlet that I know works. Something is wrong with my beloved Mac and I need some help (I'm typing this from a nasty windoze laptop).
TIA
-Dave

Well, I stumbled across a fix for my problem, merely by accident!
If anyone else is experiencing a similar problem, please follow this link:
http://docs.info.apple.com/article.html?artnum=301733
Cheers to the Apple community!
-Dave

Similar Messages

Imac does not turn off.

hello,
I have an imac, running on os x lion. u know how, when you click on shutdown, it shows the white screen. sometimes my imac does not turn off and keep showing it. could you please tell me what i can do to solve this problem.
thanks

The safe boot more or less resets system files.
When it is something in the hardware:
1.do the Pram and the SMC resets:
http://support.apple.com/kb/ht1379
http://support.apple.com/kb/HT3964
2. shutdown the mac and startup while holding the ALT(option) key: choose the Recovery Disk, from the window choose Disk Utility, select the Lion disk, choose "repair disk".
When it is not a hardware problem:
3. List the applications you installed in the last 6 months, also the ones from the Appstore.
4. List the plugins (extensions) you have in Safari.

Imac will not turn back on after being unplugged. Is there something I can do?

imac will not turn back on after being unplugged. Is there something I can do?

SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
The 5 second timing is important to a successful reset.

G5 iMac Will Not Turn On - Power Supply Diagnosis?

My A1145 20" iSight PPC G5 iMac will not turn on - it doesn't respond to the power button. It had been shut down for a few days, I turned on the power and it booted up as normal, the desktop appeared and I was about to open the web browser when it suddenly went dead; the screen immediately turned off with no warning or noise. There is no fan or disk noise coming from it when the power lead is plugged in, just a very, very faint electronic hum from inside.
From reading various webpages, it seems possible that the power supply could have failed. Is there a simple way that I can diagnose this before deciding whether to attempt to replace it myself or not? I understand that there should be some diagnostic LEDs which could help identify a problem - I've removed the surround from the iMac and peeled back the black EMI film below the display but I'm not sure for what or where I should be looking (they seem to be easier to find on the 17" models).
Whilst I know a repair might not be cost-effective on such an old machine, I have 220GB of photographs, documents and music on it - none of which is backed-up - so I am very keen to get it working and backed-up as soon as possible.
Could anyone suggest how to diagnose the problem?

Hi there:
My experience with Macintosh computers has not included the G5 iMac even though I almost got one to replace a failed-under-AppleCare iMac G4 17" 1.25GHz after three/four major failures and no local support.
...So, I think you may be able to pull the hard disk drive out of that computer and see if an external enclosure could allow you access those files IF the drive spins up at all. Sometimes odd things happen, and the G5 iMac had some history of capacitor and other failures that could be a problem. I see there are a few free information guides here that may be helpful: http://www.ifixit.com/Device/iMac_G5
If the battery on the logic board was dead, but the computer kept in running condition by leaving it plugged in, once the computer was left unplugged for a time then the device may fail to start. There is a way to reset the power management chip (different names for same idea as technology moved forward) and that could help in the process of troubleshooting most power related issues in the PPC Macs of later G3/G4/G5 design.
There are troubleshooting items of interest in here http://www.apple.com/support/imac/g5/ ie: what to do when your computer won't turn on...
Sorry to not be of direct help in this matter.
Good luck & happy computing!

My imac will not turn over, what should I do

my imac will not turn over, what should I do

Just FYI,
You are not addressing Apple here.
People here who help troubleshoot and attempt to correctly answer technical questions in these Apple Support Communities are Apple users just like yourself.
There are two initial things you can try.
An NVRAM reset.
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
After resetting NVRAM or PRAM, you may need to reconfigure your settings for speaker volume, screen resolution, startup disk selection, and time zone information. The logic board battery helps retain NVRAM/PRAM settings when your computer is shut down.
IF this fails to help reboot your iMac, you could try an SMC reset.
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Check back if neither one of these solves your iMac's issues.

My iMac will not turn on, the screen stays black, makes a whistling sound 3 short, 3 long, 3 short, well maintained while keeping on, what solution do you have?

My iMac will not turn on, the screen stays black, makes a whistling sound 3 short, 3 long, 3 short, well maintained while keeping on, what solution do you have?

For some reason its firmware seems to have been corrupted. Read:
About the Firmware Restoration CD (Intel-based Macs)
iMac (Mid 2007) and later models: About startup tones

My imac does not turn off !

My imac does not turn off ! Since i bought the imac ( february ) i had this issue
I have called aplle support and During 2 months nothing changed ! I rebbot, i cleaned the cache i mean this
Is the way apple slove issue. ? My imac does not turn off ! I have to turn it off by myself ! ( hold the power button )
Everytime !
They told me " this is because of the app you are using !" come i have adobe master cs6 and i told them
It was before i install these apps.
I would like some help ! And suggestions. I will return my imac and hope to have the new one because
Since i bought i can not enjoy the Apple product.
Thank you

Have you done the safe boot mentioned above?
Can you click on the apple on the left of the menu bar? Did you try Paul_31's advice to choose force quit to see if there are any applications that are not responding?
I tend to agree that it may be time to take it to an Apple service center for hands-on attention.
Apple normally doesn't replace a machine with a new one unless they have been unable to repair an issues(s) after several tries.

My imac does not turn al the way on the sreen is blank and it beeps

can some one help with my problem with my imac it does not turn on and only beeps

This indicates problem with RAM.
You have to take the computer to the Apple store to have it checked out.
http://support.apple.com/kb/HT5860?viewlocale=en_US
Best.

IMac Will Not Turn On (Even When Cool and SMC Reset)

Hi all.
I have recently had a VERY ANNOYING problem with my iMac. It will not turn on. No matter what. I have reset the SMC (unplug, wait whatever, plug back in etc.) and have cooled it down with time and a battery fan held up to the case, but it still will not turn on.
I am really getting sick of this iMac and feel like sending it back, but I know that there is some sort of easy fix out there somewhere. I do not want to take it to the Apple Store again (2 times in the 5 days Ive had it already).
I read somewhere else that the older iMacs have stuffed up logic boards, which causes the computer's 'max operating temperature' to be much lower than usual, causing unnecessary 'overheating'. Is there some way to disable auto-shutdowns because of temperature, or raise the maximum allowed?
Please help, I just need to upgrade my Snow Leopard to 10.6.8 (from 10.6.3) to fix some software problems!
Thank you so much!
-Michael
Oh yes, iMac stats:
1.5GB of RAM
2.0GHZ Intel Core 2 Duo processor
Early 2006 20" White iMac
Anything else you need to know about it, just ask!

Ok, the Snow Leopard disc did not have the AHT thingy on it, but the Tiger one did. Currently running extended test. Had to reset the SMC to get the thing to turn on. I will do the test twice, then reset the PRAM and give you the results.
I have come to a conclusion about one thing: Old iMacs are very fussy and take a lot of work to keep them going, but are very satisfying to use.

27" imac will not turn disply on after waking up from sleeping

I have 27" imac with 2nd monitor attached. when in sleep mode the 2nd monitor will wake up but the imac itself will not turn the screen on. (what is funny is that i can log in but the only monitor i can actually see is my 2nd one.) i must play with the power button several times to either get the imac to reboot or to wake up. any fix out there?

I have had this same problem with my mid 27inch mac 2011. I recently yesterday took it to the genuis bar so they could try to give me a solution. I showed the technicians many threads with my same problem and they acted as if I was crazy and the issue was absurd/ non valid. This problem only started happening when I upgraded to lion. I suppose to get the coputer back in a couple of days. The onl god thing I had going was all the kernal panics that were listed because of the machine having to be restarted everytime. I will provide any informatio they give me.

IMac does not turn back on from sleep mode

Hi all,
I've having a problem sometimes that my iMac won't turn back on after I put it into a sleep mode. This does not happen everytime. After the machine does not turn back on, the only workaround is to unplug the power cable and connect it back. Then I'm able to turn on the iMac. After the machine boots up, and I will get the crash report said that the machine does not turn it off properly.
I tried to reset the SMC before and it did not resolve the problem.
Any idea?

One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons

My 2010 iMac Will Not Turn On

Like the title says it will not turn on, no liquid spilled or anything, I had used it as a computer for some years but as of 2013 I got a great macbook that was faster so I have only been using it as an external monitor for my Macbook(target display), and one night I powered off my laptop, and the iMac went black and never turned back on. It just stays black, no audible sounds through the speaker, no fans turning on, it just is completely dead like.
That only things I have tried is pressing the power button, and pressing and holding the power button, I have unplugged it for a minute and tried again, I have also left it unplugged overnight and tried with still nothing.
Since I have been using my macbook I can't remember what OS i was on, but I think it was just Mountain Lion.
SAVE ME BARRY!!!
Thanks Much
KickinWolf

If it makes no noise or has no graphics that show on the display this indicates it may be a power supply failure. Take it into an Apple Store or Apple Authorized Service Provider (AASP) to be fixed.

IMac wil not turn on

I have an iMac DV SE and it will not turn on at all. When I press the power button no lights, sounds, anything. There are a couple things I have already tried. I have tried a different power cord, pressing the reset button, and I tring to start it with the keyboard power button.
If anyone can, please help!

Any possibility that it is the power switch, itself?
The power switches on these machines can "stick". It should have a little bit of "feel" when you press it.
If not, try giving it a good wiggle around.
The power cord connection can also "film over" on these computers. Try plugging and unplugging the power cord into the computer a dozen times to clear any "filming". Some people swear by a bit of emery paper or steel wool on the "prongs" in the computer side of the connection, but usually simply plugging and unplugging will do the job.
(The keyboard power key is not enabled on the Summer 2000 DVSE's, but may be on the earlier model)
A defective mouse or keyboard can sometimes prevent proper startup too. Try starting with them both disconnected if the other suggestions don't fix the issue.
I'm sure you have already tried attaching it to a different power point, just in case.
Cheers
Rod

IMacs will not turn on.

I have 2 iMacs.. One is a Rev B Bondi Blue 233.. And the other is an Orange 333.. They both will not turn on at all. My Dad is an electrician but he says he cant do anything without a schematic.. Does anyone have any advice? I would like to see them working once again. Or should I just forget it altogether?

Were they both plugged in and working recently, or were they disconnected and stored in a closet?
If they were disconnected from power for an extended time, it is possible that the PRAM battery is weak or dead. They look like this and are located on the main logic board.
http://eshop.macsales.com/item/Newer%20Technology/BAA36VPRAM/
Sounds like your dad would have a voltmeter, so you can test them to see if they still read 3.3 to 3.7 volts. Weak or dead PRAM batteries have been known to cause odd startup issues. If they are bad, you can try it with the battery removed, which I've read in a few reports as being better than having a weak battery in place.
If the iMac is absolutely dead when the power button is pressed, you can also try pressing the Cuda button (sometimes referred to as the PMU button). This image shows where it is located.
http://mrjcd.com/junk/CUDA.jpg
IMPORTANT: Only press it ONE TIME between startup attempts. Press and release.
I've had a tray-loader go dead on me, and pressing the Cuda button got it working again.

I clicked all the buttons in the file sharing window and now my iMac will not turn on.

I really goofed. I clicked all the buttons in the file sharing window (Screen sharing;File Sharing...Remote Login; Remote Management...Internet sharing) but I did not write down the IP address and now the computer will not turn on at all. Is there a way to roll back my stupidity and get this thing to turn on again?

There's only one thing you can do: make an appointment with Apple genius at the Apple retail store for a out of warranty replacement.

IMac G5 not turning on

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