Power Mac G4 won't start up after shut down

I have a Power Mac G4 (dual 1 GHz with 2 GB of RAM) running OS X 10.4.11. It has the mirror drive doors and was once referred to as the “wind tunnel”.
The problem is that it will not start up after it has been shut down unless I first push the reset button. I have tried replacing the battery and resetting the p-ram. When I try to start it without first pushing the reset button nothing happens. The light for the start button doesn’t even come on. But if I disconnect the power, open it up and push the reset button it will start up and run perfectly.
Thank you for any suggestions that you might have.

Thanks BDAqua, it does sound like a bad capacitor. The PSU is one that I put in a few years back when Apple was giving them out so as to reduce the fan noise. I kept the old one until last week when I sent it off to be recycled. I suppose it would be a tough job to find the bad capacitor and I doubt that I would have the skill to replace it even if I could find it. It's not like I really need this power mac since I have a Mac Pro 1,1 but I do occasionally want to run something in OS 9 and I do love this machine for what ever reason. There was remarkably little dust inside but I went over it with a can of dust remover.
Don

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Power Mac G5 won't start up after a security update, please help!!!

Hi all,
My Power Mac G5 version 10.4.11 keeps showing a black video, no beep, no start up chim, this occured after updating a security patch 2008-7 from Apple website, asked to reboot then I encountered this mess.
The powerlight is turn on with solid white color. My display also has its powerlight turn on with solid white. But not nothing happens, except the fan noise becomes gradually louder and louder. I wait for hours ... but ...
My system just won't start up. Although I tried to reset the SMU, reseated RAM...
I tried also to re-install the OS by CD but it's impossible to insert it to the DVD tray.
Any help is greatly appreciated, thank you for your time.
Sgmed.

Hi BDAqua,
After weeks of strugle I can use my MAC as normal, but everytime I shut it down, she cannot wake-up, I had to refer to your hints in order to start it up again. So right now I can use my MAC every day with "SLEEP" mode.
She just cannot RE-START or wake up after a SHUTDOWN.
Any suggestion is greatly appreciated, here under I pasted the log file retrieved from Disk Utilities.
(I tried also to reset PMU, SMU and PRAM but nothing helped. Perhaps she is in need of a brand new PRAM battery???
Oct 26 23:54:04: Disk Utility started.
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Preparing to secure free space : “Untitled”
Creating Temporary File
Securely erasing file
Creating Temporary File
Securely erasing file
Secure Erase Free Space stopped after 14 hours.
89.0% complete.
Erase complete.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions differ on ./Applications/iTunes.app/Contents/Frameworks/InternetUtilities.bundle/Contents /MacOS/InternetUtilities, should be -rw-rw-r-- , they are -rwxrwxr-x
Permissions differ on ./Library/Application Support/Macromedia/Shockwave 10/Shockwave 10 Preferences, should be -rwxrwxr-x , they are -rw-rw-r--
User differs on ./Users/Shared/SC Info, should be 0, owner is 501
Group differs on ./private/etc/authorization, should be 80, group is 0
The privileges have been verified or repaired on the selected volume
Permissions verification complete
Repairing permissions for “Macintosh HD”
Determining correct file permissions.
Permissions differ on ./Applications/iTunes.app/Contents/Frameworks/InternetUtilities.bundle/Contents /MacOS/InternetUtilities, should be -rw-rw-r-- , they are -rwxrwxr-x
Owner and group corrected on ./Applications/iTunes.app/Contents/Frameworks/InternetUtilities.bundle/Contents /MacOS/InternetUtilities
Permissions corrected on ./Applications/iTunes.app/Contents/Frameworks/InternetUtilities.bundle/Contents /MacOS/InternetUtilities
Permissions differ on ./Library/Application Support/Macromedia/Shockwave 10/Shockwave 10 Preferences, should be -rwxrwxr-x , they are -rw-rw-r--
Owner and group corrected on ./Library/Application Support/Macromedia/Shockwave 10/Shockwave 10 Preferences
Permissions corrected on ./Library/Application Support/Macromedia/Shockwave 10/Shockwave 10 Preferences
User differs on ./Users/Shared/SC Info, should be 0, owner is 501
Owner and group corrected on ./Users/Shared/SC Info
Permissions corrected on ./Users/Shared/SC Info
Group differs on ./private/etc/authorization, should be 80, group is 0
Owner and group corrected on ./private/etc/authorization
Permissions corrected on ./private/etc/authorization
Permissions repair complete
The privileges have been verified or repaired on the selected volume
Name : Macintosh HD
Type : Volume
Disk Identifier : disk0s3
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : first-boot/@0:3
Writable : Yes
Universal Unique Identifier : 2C999ACE-B114-3460-8FE0-4013F539F100
Capacity : 232.8 GB (249,925,094,400 Bytes)
Free Space : 221.5 GB (237,882,122,240 Bytes)
Used : 11.2 GB (12,042,969,088 Bytes)
Number of Files : 298,349
Number of Folders : 76,969
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 0
Partition Number : 3
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
70 %)
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Oct 27 20:59:00: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Name : Macintosh HD
Type : Volume
Disk Identifier : disk0s3
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : first-boot/@0:3
Writable : Yes
Universal Unique Identifier : 2C999ACE-B114-3460-8FE0-4013F539F100
Capacity : 232.8 GB (249,925,094,400 Bytes)
Free Space : 221.6 GB (237,949,358,080 Bytes)
Used : 11.2 GB (11,975,733,248 Bytes)
Number of Files : 298,359
Number of Folders : 76,970
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 0
Partition Number : 3
Oct 28 00:31:37: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Oct 28 18:50:53: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Oct 28 21:00:10: Disk Utility started.
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Repairing permissions for “Macintosh HD”
Determining correct file permissions.
Permissions repair complete
The privileges have been verified or repaired on the selected volume
Oct 29 19:55:10: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions differ on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/Info.plist, should be -rw-rw-r-- , they are -rw-r--r--
Permissions differ on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/MacOS/Flash Player, should be -rwxrwxr-x , they are -rwxr-xr-x
Permissions differ on ./Library/Internet Plug-Ins/flashplayer.xpt, should be -rw-rw-r-- , they are -rw-r--r--
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Repairing permissions for “Macintosh HD”
Determining correct file permissions.
Permissions differ on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/Info.plist, should be -rw-rw-r-- , they are -rw-r--r--
Owner and group corrected on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/Info.plist
Permissions corrected on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/Info.plist
Permissions differ on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/MacOS/Flash Player, should be -rwxrwxr-x , they are -rwxr-xr-x
Owner and group corrected on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/MacOS/Flash Player
Permissions corrected on ./Library/Internet Plug-Ins/Flash Player.plugin/Contents/MacOS/Flash Player
Permissions differ on ./Library/Internet Plug-Ins/flashplayer.xpt, should be -rw-rw-r-- , they are -rw-r--r--
Owner and group corrected on ./Library/Internet Plug-Ins/flashplayer.xpt
Permissions corrected on ./Library/Internet Plug-Ins/flashplayer.xpt
Permissions repair complete
The privileges have been verified or repaired on the selected volume
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Name : Macintosh HD
Type : Volume
Disk Identifier : disk0s3
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : first-boot/@0:3
Writable : Yes
Universal Unique Identifier : 2C999ACE-B114-3460-8FE0-4013F539F100
Capacity : 232.8 GB (249,925,094,400 Bytes)
Free Space : 221.6 GB (237,921,976,320 Bytes)
Used : 11.2 GB (12,003,115,008 Bytes)
Number of Files : 299,521
Number of Folders : 77,045
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 0
Partition Number : 3
Oct 29 20:22:20: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Oct 30 17:14:49: Disk Utility started.
Name : Macintosh HD
Type : Volume
Disk Identifier : disk0s3
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : first-boot/@0:3
Writable : Yes
Universal Unique Identifier : 2C999ACE-B114-3460-8FE0-4013F539F100
Capacity : 232.8 GB (249,925,094,400 Bytes)
Free Space : 221.1 GB (237,409,587,200 Bytes)
Used : 11.7 GB (12,515,504,128 Bytes)
Number of Files : 299,790
Number of Folders : 77,188
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 0
Partition Number : 3
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Oct 30 19:41:53: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Oct 31 20:48:58: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume Macintosh HD appears to be OK.
Mounting Disk
1 HFS volume checked
Volume passed verification
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Name : Macintosh HD
Type : Volume
Disk Identifier : disk0s3
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : first-boot/@0:3
Writable : Yes
Universal Unique Identifier : 2C999ACE-B114-3460-8FE0-4013F539F100
Capacity : 232.8 GB (249,925,094,400 Bytes)
Free Space : 221.1 GB (237,362,040,832 Bytes)
Used : 11.7 GB (12,563,050,496 Bytes)
Number of Files : 300,773
Number of Folders : 77,858
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 0
Partition Number : 3
Nov 3 15:48:08: Disk Utility started.
Verify permissions for “Macintosh HD”
Determining correct file permissions.
Permissions verification complete
The privileges have been verified or repaired on the selected volume
Name : Macintosh HD
Type : Volume
Disk Identifier : disk0s3
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : first-boot/@0:3
Writable : Yes
Universal Unique Identifier : 2C999ACE-B114-3460-8FE0-4013F539F100
Capacity : 232.8 GB (249,925,094,400 Bytes)
Free Space : 221.1 GB (237,411,020,800 Bytes)
Used : 11.7 GB (12,514,070,528 Bytes)
Number of Files : 300,976
Number of Folders : 77,880
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 0
Partition Number : 3
Nov 3 16:12:13: Disk Utility started.

Power Mac G5 won't start even after Repairing Disk and Permissions

I Repaired the Disk first by booting from the install disk and it did repair 1 item and then tried to reboot into safe mode to repair permissions and it didn't boot. I restarted by booting from the install disk again and repaired permissions and it seemed to repair alot of stuff. But it still won't start up.
I get stuck at the blue screen with the apple logo above a status bar that never moves.

Hi Larry,
Appears to be time for An Archive & Install, which gives you a new OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space...
http://docs.info.apple.com/article.html?artnum=107120

Power Mac G4 MDD - Has difficulty booting after shut down

I have a Power Mac G4 MDD (1.25Ghz) that is having issues when it is shut down. The power button on the front of the machine does not start the computer every time. Sometimes it works, sometimes I need to wait a while before it will work. When the button is pressed, it does not light up or anything.
I have noticed that if I sleep the computer it always seems to wakeup when the front button is pressed. But if I shut down the G4, is does not always bootup.
I have also performed multiple restarts when performing software updates, and they always seemed to work fine.
I have changed the Saft battery inside - it was at about .4v
I have performed a CUDA/PMU reset using the button on the motherboard, and followed the Apple procedure. (disconnect power, and accesories, press reset button, wait 10 seconds, reconnect, restart) It did not restart right away, had to wait 20 minutes or so.
The G4 has a new installation of Tiger, with all of the updates.
I have not checked the PSU, but plan on doing that soon. Just seems odd that it only has issues when the machine was shutdown. Seems to start after it sits for a while, but last night I was switching monitors, and shut it down, switched monitors, and it would not re-boot.
Any ideas?

With the "sometimes" nature of the problem, it could be the front panel board, a much cheaper replacement than a PSU. An Apple tech told me that one way to test the front panel board was to find one of the first Apple USB keyboards for the original iMac. The early ones have a power button like the old ADB boards that overrides the internal board/button. He said that, should the Mac start reliably from the old keyboard, then there is trouble with the front panel board. The Apple model number for the USB board with power button is M2452.
Very helpful forum member japamac has a test procedure for the MDD PSU on his site here:
http://jcsenterprises.com/Japamacs_Page/Blog/D275729F-09DA-4FBB-96B3-BEEEB2C0461 9.html
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My new iPad2 won't start up or shut down and I'm getting an error message OxE80000651

My iPad won't start up or shut down and I'm getting an error message when plugged into iTunes as OxE8000065!

Is it frozen on a certain screen? If yes, this happened to me when I tried updating the software on my iPad. (I have the iPad 1) All you have to do, is hold down the home button and sleep/wake button at the same time, for about 5 or so seconds. The iPad then should do a Factory Reset and turn on. After that, just connect the iPad to your computer and sync it to get all of your stuff back on it. I hope this helped! If not, could you give me any more info?

Dual 1.8Gb power mac G5 won't start up. No chime or video.

I have a dual 1.8Gb power mac G5 that won't start up after the weekend. The computer was being run as a server using OSX 10.3. When my employee came in on Monday she said the fan was running full blast, but there was no video and the computer was totally unresponsive. The computer has been restarted with and without periferials plugged in, reset the PRAM and SMU/PMU/Cuda switch. Tried different monitor. I've put the hard drive in another G5 and it worked fine. I've also noticed that this computer does not click (sounds like a relay) when plugging/unplugging the power cord. I've always noticed my other G5 does this. Any ideas? I'd like to try and fix it myself and save the "Apple Authorized Service Provider" costs. Thanks!
Eric

It doesn't seem to matter if anything is hooked up or not ... mine nor his. I've tried three different power cords in two different locations. I wouldn't know what to "tighten" inside.
Most recently at home I've tried using just the mac keyboard an mouse connected to there own USB ports off the back of the CPU and then the Apple 17" studio display from the ADC output. Still nothing. I then tried the same setup, but with a 17" CRT monitor using the DVI output and the adaptor (finally found the adaptor). It booted up fully once, but then died (I wasn't there when it happened, but when I came back no video, fans on full, and unresponsive). I hadn't had any more success until this morning when I tried to fire it up again, and it came on, but with distorted video (the one that says you need to restart your computer). I'm beginning to think this is a bad power supply problem due to the specific component failure (same bad capacitors as the iMacs), but mine doesn't quite fall within the serial number range (just before).
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Auto Start up after Shutting down

I'm new to the Mac and am not sure of this is a normal issue or if there's a setting that I accidentally triggered. On my MacBook Pro when I shut down, it starts up again after shutting down. I'm not selecting restart and am not sure if I updated software and held off on shutting down so I don't know if its that. Is there a setting I have to adjust or is there some issue I have? Feedback is greatly appreciated.

HL
Try resetting the PRAM. Force the machine to shutdown if it won't shutdown. While the machine is turned off with your leftt hand hold down the option+commands keys. Then turn the machine on and immediately with your right hand hold the P key with your little finger and the R key with your index finger. Wait until you hear the Apple chime twice, release all key and let the machine boot up. Also try starting in the safe mode. Make sure the machine is shutdown then power it on and hold down the shift key until you see the gray Apple screen then release the shift key. let it strat up in safe mode. Then login to your user account and try to shutdown the machine again. See if this helps.
Joseph

Mac mini restarts on its own after shut-down.

The Mac mini will restart by itself about 10 minutes after shut down. I turned off all the restart options in energy saver. Funning 10.4.8 with the latest firmware instalation.
Any suggestions how to stop this?

I have had this problem for a looooong time and I think I finally resolved it. Last weekend I was trying a demo of MacPilot 3 and found Elgato's EyeTV had two items in the Power > Events list. Apparently when you set EyeTV to start up the computer for it's schedule it restarts the computer randomly rather in a reasonable amount of time before the recording begins. Since there were two files, I think 1 was left over from previous EyeTV version and was starting up the computer even though I told EyeTV not to start the computer at a later date. Deleting both files seems to be the solution.

MBP won't turn off after shut down

My MacBook Pro with upgrade to Leopard is staying hot after shut down. I am having to remove the battery to make sure, otherwise I have one red hot laptop when I open up my backpack. Is this another Leopard issue?

Good morning,
No, this isn't an issue I experience with Leopard...
I'd try [Resetting your MacBook Pro System Management Controller (SMC)|http://docs.info.apple.com/article.html?artnum=303319] and see if that solves your issue.
Hope this helps! 
David

Help!! My Power Mac G5 won't start up!!

I was working on my computer when all of a sudden everything froze. I tried all the key commands and no response. So, I held the start button until it shut down. Then when I tried to start it back up again after a few minutes, by pushing the start button, only the fan starts. No start up chime. Nothing on my screen. Then the fan starts getting louder and louder like it going to explode! I quickly held the start button again until it shut down. I read through the manual and tried everything it said and still the same thing. I read through alot of the questions and answers on this forum...found alot of similar questions, but no answers that I can use. I tried replacing the surge protector, but still nothing. My business & life is on this computer and stupid me, I didn't back up much! Help!!

Hi Jen:
See if this helps:
http://docs.info.apple.com/article.html?path=DiskUtility/10.5/en/duh1018.html
"Disk Utility 10.5 Help
Testing and repairing your startup disk
If you have problems with your startup disk, you can use Disk Utility to test and repair it. To do so, you must start up from another disk, such as your Install Mac OS X disc.
Start up your computer using another disk.
To use the Install Mac OS X disc, insert the disc and restart your computer holding down the"C" Key OR (Option key and then select the Install Mac OS X disc and click the arrow).
Open Disk Utility.
In the Mac OS X Installer, choose Utilities > Open Disk Utility.
Select the startup disk you want to repair in the list of disks and volumes, then click First Aid.
Click the button to verify or repair the disk or disk permissions.
Check the S.M.A.R.T. status of your hard disk at the bottom of the window. If it shows "Verified," the disk has nothing wrong at this time. If you see "About to Fail" in red letters, back up your files on the disk as soon as possible and replace the disk."
And:
http://docs.info.apple.com/article.html?artnum=300537
"Troubleshooting: My computer displays no video
If your computer won't display video, here's how to troubleshoot it. Please keep in mind that although your computer may display similar symptoms that prevent it from turning on, this article discusses what to do if the computer won't display video, meaning that when you press the power button:
You may hear a startup chime
You may hear fan or drive noise
You may see the power light on the computer light up
If your computer does not turn on, when you press the power button:
You won't hear a startup chime
You won't hear any fan or drive noise
The power indicator on the computer won't light up at all
If your computer is not responding at all, see the Troubleshooting: My computer won't turn on article instead.
If your computer won't display video but you can hear a startup chime, fans, drive noise, or you see the power light turn on, the first question is whether you have an external display attached (such as a Power Mac G4, Power Mac G5, Mac Pro or Mac mini) or if the display is built-in (such as an iMac, eMac, MacBook, MacBook Pro, iBook or PowerBook).
For external displays
Try these steps to resolve the issue:
Make sure that the monitor is turned on and has power. Make sure that the display's power cord is plugged into a working wall outlet, and that it's properly connected to the power adapter. (To check if the wall socket is working, plug in a lamp or other electrical device.)
Check that all video cable connections to the computer video port and to the monitor are properly connected.
Examine the pins on the video cable connector to make sure they are not bent or damaged in any way.
Connect a known working display (if you have an extra one available). If you see video after doing so, replace your old display.
Reset the computer's parameter RAM. (Click the link for instructions.)
On a Mac mini, reset the computer's PMU. (Click the link for instructions.) For Power Macintosh G3, Power Mac G4, or Power Mac G5 computers, check your user guide for the location of the PMU reset button on the logic board.
Next we're going to check to see if the computer has video when started up from a disc:
Find the Install or Restore disc that came with the computer. Insert the Software Install and Restore disc into your CD/DVD drive. The disc may look something like the picture below.
Shut down your computer.
Once it's off, hold down the C key on the keyboard and start up your computer. This will start up the computer from the Software Install and Restore disc instead of your hard drive.
If you see video when started up from disc, you may have corrupted software. You can use the Archive and Install feature of the Mac OS X installer to reinstall. This kind of installation gives you a fresh version of Mac OS X, but you don't lose any data from the computer as your old information is all archived.
If you tried all of the steps above and the computer still won't display video, contact Apple technical support (1-800-APL-CARE in the U.S.) or take your computer to your local Apple Store or Apple Authorized Service Provider (AASP) for diagnosis.
For built-in displays
Try these steps to resolve the issue:
Make sure that the power cord is plugged into a working wall outlet, and that it's properly connected to the power adapter. (To check if the wall socket is working, plug in a lamp or other electrical device.)
Make sure that the power adapter is properly connected to the power port on the back of the computer.
Reset the computer's parameter RAM. (Click the link for instructions.)
On an iBook or PowerBook, reset the computer's PMU. (Click the link for instructions.)
Next we're going to check to see if the computer has video when started up from a disc:
Find the Install or Restore disc that came with the computer. Insert the Software Install and Restore disc into your CD/DVD drive. The disc may look something like the picture below.
Shut down your computer.
Once it's off, hold down the C key on the keyboard and start up your computer. This will start up the computer from the Software Install and Restore disc instead of your hard drive.
If you see video when started up from disc, you may have corrupted software. You can use the Archive and Install feature of the Mac OS X installer to reinstall. This kind of installation gives you a fresh version of Mac OS X, but you don't lose any data from the computer as your old information is all archived.
If you tried all of the steps above and the computer still won't display video, contact Apple technical support (1-800-APL-CARE in the U.S.) or take your computer to your local Apple Store or Apple Authorized Service Provider (AASP) for diagnosis".
-Robert

Power Mac G5 won't start up and is beeping

Dear friends,
This morning, my Power Mac G5 started to beep. When I try to restart it, it beeps some more and also makes a clicking sound like a metronome.
The computer won't start up anymore. At startup, it displays a grey screen with a little folder in the center that flashes a question mark and a finder icon.
What is wrong with my excellent computer, and how do I fix it?
Marnie

Marnie Glickman-
Could be a variety of things, but most likely your hard drive is not happy. The flashing question mark means that the system is trying to find a working disk with a valid system on it. Should be the hard drive. Isn't.
Launch from the install DVD of the latest OSX system you have. Under the Apple Menu should be the Disk Utility. Launch it and try repairing your hard drive and see if that does the trick.
If not we dig deeper into this excellent problem.
Luck-
-DaddyPaycheck

Please help! 2.7 Power Mac froze, won't start up past white apple screen!

Hello!
I own a Dual processor 2.7 power mac G5. I only had safari and itunes running when everything came to a freeze without any kind of crash message. Upon force-shutting down the computer, the white screen with the gray apple came up, but would not move past this point! I also did not notice any sounds coming from my machine! I force-shutdown and started it up again and the same occurred. I left the room to jump on this computer (my old, trusty G3 iMac) to try and research while I let it try to start up. When I entered back into the room, I heard the fans going a pretty full-blaze with the white screen w/ apple still starring at me. So I shut it down and came here to post. If it is major issue, at this point, I just want all of my data to be safe. Can someone help me? Any ideas or suggestions? I am not thinking too clearly.

Hi-
Don't give up yet.
There are a few things to try before hauling the machine in for diagnosis.
What I think you should do now, is to follow all the steps (in order) as listed/described in this article:
http://support.apple.com/kb/TS2570
Even if you have tried before, please follow the order of troubleshooting.
Each step helps to isolate the problem.
Removing all but keyboard, mouse, and monitor is important.
Try the Safe Mode boot, followed by resetting the PRAM.
In lieu of repairing with Disk Utility, try and start to your DiskWarrior disk.
Remember, booting to Disk warrior can take several minutes, so be patient.
In the "Remove third-party RAM and internal hardware" step, try removing and reseating the RAM, and graphics card, attempting to boot after RAM, and again after graphics card.
Instructions for removal and replacement are here:
http://support.apple.com/kb/TA22565
Also, it wouldn't hurt to try booting the G5 to firewire target disk mode.
but I wonder what my G5 (the fans, in particular) would make of that interaction. hmm . . .
The fans are just noisy. They will insure that overheat damage doesn't occur.
If the firewire boot is successful, it may be wise to copy your files so that you can try a reinstall of the OS, should that be necessary.
Also, again worst case, check for coolant leakage:
http://www.fusina.net/G5coolantleaks/gallery.php
http://www.xlr8yourmac.com/systems/G5coolantleaks.html

Power Mac G4 won't start - no activity except light.

I have a Power Mac G4 (1.25ghz, 2.25gb RAM, 80gb HDD) that is having somewhat of a strange problem. Basically it's not powering on at all, the light powers on when you push it but once released it goes out. No sound, no fans, no other activity. However if you hold the button in the light will stay on. It's almost identical to the problem this gentleman had:
http://www.ehmac.ca/mac-ipod-help-troubleshooting/8884-powermac-g4-wont-boot.htm l
No I have already tried reseating all the connections on the board (power, RAM, GPU, etc.), tried booting it with only the original 256mb DDR stick of RAM, booting with known working RAM, and resetting the PMU.
I am thinking at this point it may have to do with the PSU, but I thought I would post here to see if anyone had any other ideas. Apparently I am not the first person to have this issue and was wondering if anyone here had something similar, and how you resolved it. Thanks!

It can be due to the button itself. See this:
http://support.apple.com/kb/TA27071
The power button lives on a separate component called the "front panel board." or "FPB" hereafter. They can fail, and are a much cheaper fix than a new PSU of logic board.
An Apple tech at a nearby college told me a way to test for a bad FPB. It requires that you find one of the original Apple USB keyboards that came with the first iMacs. It's model M2452 and, unlike newer keyboards, has a power button much like teh older Apple ADB boards.
The tech said that, when using the old iMac board, the power button overrides the buton on teh FPB and should start the computer if only the FPB board is bad. If the keyboard switch does not work, then there is something more expensive at fault.

MacBook won't start on battery/shuts down when power adapter is removed

Help & advice needed please.
My MacBook won't start without external power, it gives a whir then a click then nothing. Once started up, if I remove the external power it just shuts off.
The battery shows at 98% & charging. Coconut Battery shows the following:
Current battery charge 4126 (& increasing as I type)
Maximum battery charge 4200
Current battery capacity 4200
Original battery capacity 5200
80%
Battery loadcycles 111
Age of your Mac 6 months
Charger connected yes
Battery is charging yes
Does anyone have a clue why the Mac won't power itself on the battery when everything else seems like it works?
Cheers!

As of today, my MacBook and I have been together for 40 days. Yesterday, while I was happily surfing (on battery), it powered down with no warning. Okay, these things happen. I plugged it in, restarted, and all seemed to be fine. Battery was about 70%. I did other things on my other machines and when it was about 90%, unplugged it and everything was good. This morning after using it unplugged for 1.5 hours it did the same thing, but decided to only work with the power adapter, not on battery alone. When trying to boot without AC, it would try to spin the CD and then fall back into off. When on AC, if I pulled the adapter, it would last two seconds and go blank. I made an appt. with the Apple store (Fashion Show Mall, Las Vegas) for 3:20pm. I got there right at 3:20pm and the monitors showed I was 5th in line. Store was fairly packed, at least one patron at every display item. Monitors also said the next MacGenius appt. was "approx. 8:30pm." Glad I made an appt! I was served about 15 min. later, during which time the monitors had changed to "No more MacGenius appts. available today, please try tomorrow." However, one guy came by without an appt. and was told he would be put on standby and to come back in 30 min.
Once I explained my issue with my MacBook battery, my Genius tried one of his batteries. "I just want to make sure it's your battery and not your motherboard." My machine worked fine, so he said "No problem, I'll have you out of here in 10 minutes." He got me a brand new battery, tested it, and put my old one in a box on the rear counter with four others. He pulled the serial number from the "About this Mac" area, didn't need my receipt for purchase date or anything. I had even printed this page: http://www.apple.com/support/macbook_macbookpro/batteryupdate/ to use as ammunition, but didn't need it. He did approve highly of my dashboard widget "iStat pro", available here: http://islayer.com/.
So the battery issue is a very common problem, and one that Apple has tried to deal with as painlessly as possible for the consumer. My Genius did ask if the battery showed an "X" in the icon bar, and I said no. Just wouldn't run on battery. On the way out of the store, one of the 3 MacBooks, in fact the one closest to the door, had an "X" on the battery icon. When I unplugged the power, it shut down immediately! The moral of the story is to contact Apple immediately with problems and give them a chance to fix them. Hope this helps others.

Macbook Air won't start up after shutting it down for about 20 minutes

I shut my MBA for about 20 minutes then I tried to turn it on but it won't let me, it is at 49% battery. I pressed the on/off button then waited for about 30 seconds but nothing happened, then i waited for longer and pressed again then it turned on. (I also heard the fans) Can you guys please tell me why this happened and how can I deal with it next time? Thanks a lot.

I would recommend a SMC reset.
SMC RESET
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination 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.
Roger

Power Mac G4 won't start up after shut down

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