Ibook stuck on grey loading screen when turned on

When I start my Ibook G4 it goes to the grey loading screen and the loading circle spins round for hours but it won't do anything else.

Hello TeenageDirtbag,
be patient. You have posted your question in the
iBooks forum and not the notebook iBook forum.
Someone with more privileges may be able to move
your question or you can re-post it here:
https://discussions.apple.com/community/notebooks/ibook
There are a lot of good people there. Hope you find joy.
Good Luck,
A

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Power it down by holding the power button down. Then try to power it up again. Post back. It would help if we knew what OS you are running, the model MBP...

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Message was edited for additional clarity by: BrzrKrk

Well, I brought to the Apple Store's genius bar. Can't say enough about the experience... they archived and reinstalled... tried everything else and like sometimes happens, transfer of data can become corrupt in a spot that just makes things go haywire. So the Archive and Reinstall worked like a charm.
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For all who are having problems, I urge you to not damage the wall any further with continuous headbanging: make an appointment and definitely visit the Genius Bar. Your head will thank you

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Hi Arthur, and welcome to Apple Discussions.
While booted from the install disc, have you opened Disk Utility and checked SMART status and run Repair Disk?

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Hello,
I've read quite a lot of threads on the "grey loading screen" in this forum but the content remains buggy when i plug the content on an LMS with 100% completion
To reproduce the bug the user should :
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3-Re Open it
4-Move to a previous slide
5-Close the content
6-Use IE and syfadis as LMS
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Hello,
I have a Macbook Pro and recently its been having repeated kernel panics. In the past few days its been turning off every few minutes or so. yesterday it had one and now when I try to turn it on it doesn't load. I get the white loading screen with the apple logo and a loading bar underneath. But after the bar fills about 5% of the way (if that) the bar just disappears and the spinning loading icon just keeps going without anything happening (however long I leave it).
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Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
a. Boot into the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. The easiest way to deal with the problem is to boot from an external drive, or else to use either of the techniques in Steps 1b and 1c to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Boot in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 6.
If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)
If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
Step 9
Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 10
Repeat Step 9, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
Step 11
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a boot failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 12
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

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Hi,
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Sandy

Connect to iTunes on the computer you usually Sync with and “ Restore “...
http://support.apple.com/kb/HT1414
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http://support.apple.com/kb/HT1808
Note on Recovery Mode.
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Be sure to Follow ALL the Steps...
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http://support.apple.com/kb/PH11044
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http://support.apple.com/kb/PH5836
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Welcome to the Apple discussions.
First, you should fill out your profile to show which Powerbook system you have and which operating system you are running.
Find the original OS X disks that came with your system, insert the first one, and reboot holding the C key down. This will cause the Powerbook to boot from the OS X disk. Load Disk Utility, and repair the internal hard drive. Does this give you any error messages then terminate? If not, and it works, eject the OS X disk and try rebooting. If it gives you an error message, please post what it says. If it's something like 'bad b node' or 'bad tree', you'll need to use a program like Disk Warrior or TechTool Pro to fix it, as Disk Utility can't repair those types of errors.
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Solved!
Go to Solution.

Thanks alot mate
It worked I slept after posting as I had just returned from the party & just woke up as my mobile was ringing, but by the time I picked it, it ran out of battery & turned off. Now it is working when I connected the charger
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Hello,
Some information you may or may not have read.
Troubleshooting portables that won't turn on or start up
http://support.apple.com/kb/TA25686?viewlocale=en_US
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Ibook stuck on grey loading screen when turned on

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