Powerbook stuck at black apple on grey background...

Tonight I have witness a strange event with my Powerbook:
I started my Garageband programme and while this was happening suddenly a very high pitch sound took over from iTunes in the background. Also the computer seemed to freeze. I might have panicked a bit as the sound was painful. I switched off the computer by pressing the on/off button for about 6 sec.
When I tried to restart, the dark grey apple icon would on light grey background, the HD seems avtive and nothing happens for hours (I have tried 2-3 hrs). I have then switched it off again, and restarted in T-mode. The Firewire icon would appear on the screen, but the icon would not appear on the iMacG5 I have connected it with.
Unfortunately, there is a non bootable DVD stuck in the optical drive so I cannot try booting from it, as I do not get it to eject.
Not sure what to make of this!
Do you have any suggestions?

Bernd,
This is a question for those who know Macs really well, which is not I. Sometimes it's interesting & educational to all to guess, however.
Why didn't you turn down the speakers or pull their plug first? If you were using the computer's speakers, did you have the volume turned up all the way? When GarageBand starts, does it turn on the computer's microphone for input? You see where I'm going with this: could the screech be caused by feedback from the speakers to the microphone?
Also, there was a time (I think) when using Quicktime to handle two different applications that ran audio at different bitrates caused a whine. That was patched some revisions ago. Finally, two sound-producing applications that compete for the speakers can produce a whine as a (faulty) scheduler tries to run both by quickly alternating between the two.
I'm not sure the whine (which you can reproduce?) is related to your boot problems, however. They are more likely related to pressing the on button to shutdown. (I didn't know one could even do that: the PowerBook doesn't have an off button.) MacOSX needs to do many chores as it shutsdown: quit each application you were running (and a decision it can't make, such as whether to save changes you stored in memory or delete them will stop the shutdown), quit the OS's processes, and update the disk's information about the filesystem with changes held in memory. Then it writes a bit of information stating the machine was shutdown cleanly.
If you had held down a mouse or touchpad button when starting, the optical disc should have been ejected, and the computer should have booted Darwin from the hard disk; then, noting the clean-shutdown bit was unchecked, it would have performed a long test of your filesystem's integrity before starting up MacOSX normally.
The grey Apple appears while your computer is looking for the boot drive and reading the booting information off its disc. If it can't find an acceptable boot device, it stays at the Apple. If it is confused, it displays all those it found and asks which you want to boot from. It found two drives, neither in perfect shape for booting.
Why it didn't boot slowly from the hard disk would appear a mystery. It's possible that starting with the 'C' pressed saved in Open Firmware the location of the boot disk: the optical one. Disk Utility doesn't check whether a disk is bootable, so the 'clean shutdown bit' stayed unchecked.
I'm guessing that, with the optical disk removed, the computer showed a grey Apple, then a choice of bootable disks it found; and you chose the hard disk.
Important questions are still unanswered, of course. And, much of the above is guessing (to encourage an expert to correct my guesses and address the whine question definitively); but it gives you bits of information to read about yourself, if you're interested.
Bruce

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B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D13 24 24 32 31;D13 25 37 32 33;A1 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 48 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D13 14 2 48 43;D13 4 5 32 1;D22 4 4 50 0;D13 14 3 49 5;D12 26 48 59 49;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
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[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report the results. No harm will be done.
11. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with "Model Identifier." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
12. When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

My mac book pro will not fully boot up. I have the grey background with the apple sign and the timer going round...but 20 minutes later still no desktop

My mac book pro will not fully boot up. I have the grey background with the apple sign and the timer going round...but 20 minutes later still no desktop

You could try doing a hard shut down (holding the power button or yanking the battery) and then doing a safe boot by holding the shift key at startup:
http://support.apple.com/kb/HT1455
Also, not sure if this applies in your case, but I've had that happen when there's a USB drive inserted either in the computer or a connected external keyboard. I did a hard shut down, removed the drive and it went through a normal start up.

Stuck with black screen with Apple and download bar approx 1 quarter done. Downloading Yosemite. It has completely stopped. I can't access anything. Please help

Stuck with black screen with Apple and download bar approx 1 quarter done. Downloading Yosemite. It has completely stopped. I can't access anything. Please help

You should really read the manual.
"How do you restore from backup? "
Restore. When given the choice, choose to use backup.
"And how can I check to see if the pics and videos are on my computer somewhere first??"
They would only be where you put them. What program did you use to import them? Pics/vids taken with ipod are not part of the sync process at all. You should be importing them just as you would with any digital camera.
If you did not import them, then they are not on your computer.

Apple logo and spinning timer with grey background pls help

I just get a grey background with apple logo in dark grey with a spinning timer thing below and you can here the fans running when I turn on my new mac book its a day old!
I have tried removing battery holding down power button
i've tried reseting pram and navram ctrl cmd p & r buttons.
is there anything else to try before I take it back?

So you never got to see what your new desktop or programs are like?

4s bricked after trying new update, stuck with black screen with apple logo how can i fix this

Update bricked my 4s
phone , stuck with black screen with apple logo ..
how can I fix this

Greetings r1042,
Welcome to the Apple Support Communities!
I understand that your iPhone is not booting up past the Apple logo. In this situation, I would recommend working through the troubleshooting steps located in the attached article.
If your iPhone, iPad, or iPod touch doesn't respond or doesn't turn on - Apple Support
If your device gets stuck during startup
When starting up, you might see the Apple logo or a red or blue screen for a long time, or your device might restart again. Try these steps:
Make sure that you have iTunes 12 or later on your computer.
Put your device in recovery mode.
When you get the option to restore or update, select Update. This will reinstall iOS without erasing your data.
Have a great day,
Joe

My iPhone 3gs is stuck on black screen with the apple logo, help

my iPhone 3gs is stuck on black screen with the apple logo, help

then get it replaced if that doesnt work or try to le tthe battery die and recharge

The screen on my 5c is stuck on black with apple logo

The screen on my 5C is stuck on black with the apple logo. I cannot get it of function.

Did you already try to reset the phone by holding the sleep and home button for about 10sec, until the Apple logo comes back again?
If this does not work, try to connect in recovery mode, explained here:
If you can't update or restore your iOS device

My iPhone is stuck on the black Apple logo screen.

Hi,
So I just bought my friends used iPhone 2G. So in the car, on the way home, I reset everything on the phone because his all his stuff was on it. So when I got home it said it was done, and it was stuck on the black screen with the white apple logo. I shut it off thinking it would come back on and go to the slide to unlock screen. Nope. It is still stuck on the black Apple logo screen. Keep in mind, this phone has never been attached to my computer. Please help me. I'm really excited that I bought this. Now I REALLY want to use this.
Thank you,
DJ

Do you plan on activating the iPhone with AT&T?
If so, are you currently an AT&T subscriber?
If you plan on activating the iPhone with AT&T, you need to get a new SIM card from an AT&T corporate store.
When connecting the iPhone to iTunes for the first time with the new SIM card inserted, you should be prompted with the AT&T activation process.
If you don't plan on activating the iPhone with AT&T, did your friend include the no longer activated SIM card inserted in the iPhone - the SIM card that was used with the iPhone when it was activated with AT&T? If so, you can restore the iPhone with iTunes on your computer as a new iPhone. Activation with AT&T will not be required, but the no longer activated SIM card (the SIM card that was used with the iPhone when it was activated with AT&T) must be inserted in the iPhone to complete the restore with iTunes process.

My iPad wont turn on, its black screen then i press home power buttons together and white screen with black apple logo come out after 5 seconds black "lighten" screen comes out and its stuck just like that! Whats the problem?

HI
this happened today suddenly while i was working on my iPad it kicked my out of the app that i was using then white screen with black apple logo came out, i thought it was an ordinary thing cause this happens all the time with me, but this time it refused to turn on! After the white screen with the black logo vanished i wad waiting for my lock screen but no, a black screen showed up just like that! And could tell it was black "lighten" screen i tried more than 10 times to do the home+power thing but it wont work, whats wrong with my ipad!

If the battery is completely drained it may take some time while on the charger before the iPad responds. Plug the iPad into the charger that came with it and plug that into a good wall outlet. Wait one hour. Then reset your device. Press and hold the Home and Sleep buttons simultaneously until the Apple logo appears. Let go of the buttons and let the device restart. If the iPad restarts let it continue to charge until the battery is 100%. If it doesn't start up make an appointment at an Apple Store to have your device examined by a technician. Or contact Apple Support. They will examine your iPad and explain your options.

Grey Background of Arcobat program conflicts with Grey PDFs

I have a client who use a grey background & border on their ads. This grey background is almost exactly the same colour as the background colour of Adobe Acrobat Professional - so when I view pdf's I cannot see where the pdf page ends or starts as it merges with the background colour of the Adobe Acrobat Professional program.
In previous versions of Adobe Acrobat Professional the page had a black drop shadow and the program grey was lighter so this was not an issue.
Using:
Windows
CS3 - Adobe Acrobat 8 Professional

Thank you for providing the system info. At least we have some idea. Your GF either has Lion or Mountain Lion...version unknown.
Disconnect all devices from the MBP when troubleshooting to avoid conflicts. Try the following by clicking on all the links until you try the one that hopefully works:
http://support.apple.com/kb/TS2570 Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/PH10929 OS X Mountain Lion: If your computer stops or delays while starting up
http://support.apple.com/kb/PH11044 OS X Mountain Lion: If you see a gray screen at startup
http://support.apple.com/kb/HT1564 What is Safe Boot, Safe Mode?
http://support.apple.com/kb/PH11212 OS X Mountain Lion: Start up in safe mode
Check out: Troubleshoot the spinning beach ball/freezing & crashing and Troubleshoot the spinning beach ball

Powerbook stuck at black apple on grey background...

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