Computer won't start from CD!

I tried booting from a CD by holding the "c" down when I start up the computer. I'm trying to run TechTool Deluxe... Anyway, I've tried holding down "c" numerous times, and it just boots up like normal. Then, I also tried something listed, which I found online for an older computer... Holding down command/option/O/F all at the same time, and that didn't do anything either. Can someone help?! I don't know what's wrong!
Thanks!
Tiff

Where did you get the CD from? It may not be a bootable cd. The TechTool Deluxe disk that comes with Apple Care is not bootable. You just install the program and run it from your booted system. cmd/option/o/f is for booting into Open Firmware which was used on the older Power PC based Macs. EFI Firmware has replaced OF on the Intel machines so that command no longer works.
George

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Computer won't start from hard drive or CD, and won't perform system recovery.

I have an HP Pavilion g7-1314nr. Yesterday it froze and I held down the power button to turn it off. After turning it back on, it started a disk check. I turned it off during the disk check, and upon trying to boot it back up, it told me booting failed and to press CTRL-ALT-DELETE to try again. After multiple attempts, it stopped displaying this message. Under system diagnostics, I ran a boot test, and it failed. Attempting a system recovery brings up the start-up windows logo, and then a black screen with an enlarged cursor. This morning, I inserted a recovery disk and told it to boot from internal CD/DVD drive. Like system recovery, it brings the Windows logo, and then a black screen with an enlarged cursor. My computer is incapable of booting from either the hard drive or a CD. What do I do?

Hi @TeridaxXD001 ,
Thank you for visiting the HP Support Forums and Welcome. I have looked into your issue about your HP Pavilion g7-1314nr Notebook and issues with Windows 7 and starting up. I recommend to restore the BIOS defaults. You could restore the BIOS with this document selecting the reloading the BIOS default settings which should resolve the fan issue.
Here is a link to computer won't start for Windows 7. There is a section on getting past the HP Logo screen.
If that does not help at the end of the document it shows you to do a hardware test.
Please note remove any and all USB devices before troubleshooting. Disconnect all non-essential devices
Hope this helps you out.
Thanks.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

Computer won't start up after changing permissions.

I accidentally changed the permissions for all of the files on my hard drive. Now, Leopard won't start up. And to top it all off I conveniently can not find my Leopard disk. I did, however, locate my Tiger disk but the computer won't start from the CD drive either.
I also thought that I could install Tiger on an external Hard Drive using my sisters computer but Tiger would not install on the USB Hard Drive because it said Mac OS X could not start from the external hard drive.
It won't start up in "Safe Mode (holding the SHIFT key)".
Anybody have any suggestions?

You can, in addition to Barry's excellent suggestions, reset the SMU.

Firmware update progress bar appears and computer won't start up

Hi,
I am on OS X 10.6 (the latest developer build, whose build number I can't remember and can't look up because my computer won't start up) and this morning when I tried to start up my computer, it chimed, the apple appeared but then a grey progress bar (like the one that appears during a firmware update) appeared at the bottom of the screen along with the customary spinner. This progress bar didn't update and after 10-ish seconds, it disappeared and left just the spinner. I left the computer in this state for 4 hours and nothing happened. It still starts up in single user mode (but I can't seem to get Open Firmware mode to load) and it starts Windows XP on another partition of my main HD.
When I start it in verbose mode, it says that my catalog B-tree has keys out of order and it is unable to repair them. Also, I get an error message from launchctl: "Bug: launchctl.c:2033 (23930):17: auditquickstart() == 0". Then later on it tells me to convert a few system plist files to launchd (all in the /etc/mach_init.d/ folder). The very last line says "launch_msg(): Socket is not connected".
I would rather not re-install the system, but if I have to, I guess I will. I appreciate any light that anyone can shed on this problem.
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Kyle

Yes, they (the third-party utilities) both come on bootable DVD's. As I mentioned, since Snow Leopard was just released in its final version, the developers may be in the process of releasing updates.
Your situation is likely to be a case where the data corruption issue already existed before installing Snow Leopard, and the installation process made the problem more apparent (because something critical was installed where it was affected by the data issue).
It is a good idea to run +Repair Disk+ in Disk Utility on the startup volume before installing a major system update. Actually, I do it before any system-level update.
You should also have a backup (at least of your personal data if not the entire volume), in case something bad happens during a major system upgrade. If you were using Time Machine, the easiest recovery would be to reformat the internal drive and use the Time Machine complete volume restore utility to restore the volume back to the date/time state just before you installed Snow Leopard. Then, after restarting from that restored volume to make sure everything is working, start up from the Snow Leopard installation disc, run Disk Utility and use +Repair Disk+ (just to be sure), and run the upgrade to Snow Leopard again.
If you have a backup of at least your personal data, you may want to reformat the internal drive, install Snow Leopard and bundled apps, install your third-party apps from their original sources, update everything that needs updating, and restore your personal data.
If you don't have a backup, the best bet is to try either DiskWarrior or TechTool Pro. DiskWarrior is very specialized into repairing this type of data problem. TechTool Pro has similar capability, but it is a more general tool with other features.

What does a file folder with a question mark in it mean when the computer won't start?

What does a file folder with a question mark in it mean when the computer won't start?

There are four general causes of this issue:
1. The computer's PRAM no longer contains a valid startup disk setting when there aren't any problems with the disk itself. This can be checked for by pressing the Option key and seeing if the drive appears.
2. The internal drive's directory structure has become damaged. This requires usage of an alternate bootable system to perform the repair.
3. Critical system files have been deleted. This requires usage of an alternate bootable system to reinstall them.
4. The internal drive has died or become unplugged. This is the most likely case if the computer took a sharp impact or there are unusual sounds coming from the hard drive's location.
(68976)

Mountain Lion update, and now computer won't start up?

Writing this for a friend, as his computer is inop at the moment. Hence this message.
He has a new 27" iMac. He upgraded to Mountain Lion a few weeks ago, and then had intermittent problems with apps unexpectantly shutting down.
Now he did a ML update this morning, and his computer won't start up. It gets to the point of the Apple logo coming up, a progress bar, and then the spinning wheel, but then shuts itself down right afterwards.
A safe boot yields the exact same result.
Any thoughts out there on what he could try to get it up and running again?
Thanks much for any and all help.

Thank you for the fast response.
He was able to get into Disk Utility with the Command and R keys, but when he tried verifying the disk, in red it said 'Invalid Node Structure, volume could not be verified completely'.
He went ahead and verified it anyway, then proceeded to repair it. Howver, it stopped repairing, said it cannot repair, and that he should back up files and reformat the disk.
How can he back up his files? He cannot see a way to do it. Is there anything else he can do besides having to reformat the disk?
This is his first Mac (after much prompting from me to go Mac), and he's afraid he's now lost everything on there.

Help, computer won't start up

Help, my computer won't start-up now. I downloaded one of those free .swf converter softwares from the net and now I think in the restart process, which should've completed the download like it said, instead it's like I don't have any OS on my computer anymore. And if that doesn't make things worse I was trying to reinstall OS X and it wants to go the net to do that but when i try to it asked my to login to the apple store with the ID i purshased it with and I didn't buy it I downloaded it from a P2P site, so of course the apple store tells me when i login to login with the ID I bought it with so now what, I don't want to lose my file's what should I do anybody got any suggestion. This is what I tried so far.
When it starts up I see the OS X Utilities window
I clicked the the Disk Utility, and clicked my HD and clicked repair.
When it was done it said
The volume appears to be ok.
Volume repair complete.
Updating boot support partitions for the volume as required.
Now what, also I did it again after I held CMD + R
Still when I start up I don't see my hard drive just the OS X Utilities window.
Also when I downloaded the OS X 10.8.5 I saved it on an external but its plugged to my only computer and thats the one I'm having the trouble with, sorry about all the miss spelled words if you can read this and help please do...

Try booting from your system CD, run Disk First Aid from your Disk Utility and repair your permissions.
-Bmer
Mac Owners Support Group
Join Us @ MacOSG.com
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New HD not recognized - computer won't start

Powermac G4 MDD
Originally had 2 hard drives -- 60GB (jumpered as master) and 40GB (jumpered as slave)
The 40 GB failed and the 60 GB was diagnosed as failing so I purchased used Seagate 160 GB ATA/100 Hard drive
I installed the new 160 GB Hard drive in place of the 40 GB HD and used SuperDuper to clone the still working 60 GB drive. The files were all copied to the drive and the drive showed up on the desktop as a hard drive icon, and it was recognized in the System Profiler. However, I could not select it as the startup drive from the System Prefs window.
I then took out the 60GB drive and replaced it with the 160 GB drive jumpered as cable select and now the computer won't start up (flashing question mark).
What have I done wrong?

I read through all this and still have some trouble. The article says that in Disk Utility if I select the drive a tab named "Partition" will appear at the top of the window among the other tabs. It doesn't.
I noticed some differences in the spec for the 2 drives currently in the machine: specifically, the new 160 gb drive is formatted (right word?) as GUID not AMD as the old drive is. But I can't figure out how to access that "partition" option and make the change. Here are the spec from System Profiler:
160GB Drive:
ST3160812A:
Capacity:    149.05 GB
Model:    ST3160812A
Revision:    3.AAE
Serial Number:    5L****J3
Removable Media:    No
Detachable Drive:    No
BSD Name:    disk0
Protocol:    ATA
Unit Number:    1
Socket Type:    Internal
Low Power Polling:    No
Mac OS 9 Drivers:    No
Partition Map Type:    GPT (GUID Partition Table)
S.M.A.R.T. status:    Verified
Volumes:
Seagate 160GB Drive:
Capacity:    148.73 GB
Available:    111.35 GB
Writable:    Yes
File System:    Journaled HFS+
BSD Name:    disk0s2
Mount Point:    /Volumes/Seagate 160GB Drive
60 GB Drive:
ST360021A:
Capacity:    57.27 GB
Model:    ST360021A
Revision:    5.21
Serial Number:    3H****4N
Removable Media:    No
Detachable Drive:    No
BSD Name:    disk1
Protocol:    ATA
Unit Number:    0
Socket Type:    Internal
Low Power Polling:    No
Mac OS 9 Drivers:    Yes
Partition Map Type:    APM (Apple Partition Map)
S.M.A.R.T. status:    Verified
Volumes:
60GB HD Mac OS:
Capacity:    51.26 GB
Available:    12.73 GB
Writable:    Yes
File System:    Journaled HFS+
BSD Name:    disk1s9
Mount Point:    /
<Edited By Host>

My computer won't start up it's stuck on the blue screen

my computer won't start up it's stuck on the blue screen

I've researched and I'm doing the internet recovery HD, hopefully I can move on from this situation..

Mac OS 10.5 / I deleted the " Private" folder ... and emptied the trash. So the folder and its contents no longer exists on my computer at all !!! I do have the OS dvd that i purchased years ago... But my computer will not start from it on its own. My

Mac OS 10.5 /
I deleted the " Private" folder ... and emptied the trash. So the folder and its contents no longer exists on my computer at all !!!
I do have the OS 10.5 dvd that i purchased years ago...
But my computer will not start from it on its own.
My question is what is the open source or terminal language code used to tell my mac to look in the DVD rom drive for startup info? I know that im not the only person in this world who has deleted the "PRIVATE" folder and emptied the trash so it no longer exists on their machine...
That said theres gotta be a common fix for a Power PC G4 that has the OS X dvd in the rom drive but wont look to it to reinstall the vital contents of the PRIVATE folder.
Once again there is not a copy of this file or its contents in the recycle bin...
Also rebooting the machine , pressing and holding the letter C does not prompt the machine to look to the dvd rom drive.
I was reinstalling pro tools and figured I would make some room by cleaning my computers HD...
Lol It was a bad choice to delete this file ...
Thanks guys

Okay sorry it took forever to respond... But for a while there I gave up on this computer!!!!
Money's been tight lately , so taking it in to a professional was not yet an option... though I did consider it eventhough.
Anyway long story short im glad I didnt spend any money because I already had all the tools necessary to fix this issue but was going about it in the wrong way. Okay so here is my scenario and the breakdown... Though this may not fix the issue for everyone :( which *****... But I know we all will have different circumstances.
Anyway here we go...
Okay so first things first.... Years ago I purchased the OS 10.5.1 disk ... So that has always been in my possession!!!!
I realize that some may not have a disk to reflash your OS to your hard drive... but if you do your in luck.
2ndly ... I had an external harddrive with all of my itunes downloaded music so it was more than okay with me to delete my primary HD because all the important stuff could either be copied over or repathed to be located.
-------If you dont want to read through the whole story the fix is summed up in the bottom section-------
Okay so now the SOLUTION!!!!
By trial and error , and pure boredom I opened up my computer to clean the inside...
AND
"Disconnected the primary HD"
and just because ....... REBOOTED my computer. Just to see what it would do.
Upon restart and though it looked like it would repeat its usual cycle...
About 1 minute in to that process my computer froze for about 2 seconds and flashed to the OS installation screen.
Mind you I havent seen this screen yet... Probably hasnt been since I installed the OS years ago.
After a bit of trial and error...
I decided to tell my computer to startup from the OS 10.5 disk located in my dvd rom drive and restarted once again...
this setting is under
Utilities / startup disk
After a little more trial and error ... I realized that I could reconnect the primary HD , restart the machine and return to the OS installation menu.
So upon this discovery
I went to the Disk Utility located under Utilities
Highlighted my primary HD located in the left hand column
Once highlighted ...
In the heading section on the right I selected the option
Erase
in which I erased My current OS on my primary HD ...
I used the first option in the list under security... Because it seemed like the least invasive and would take the least amount of time to see if this process would actually work.
I FORGOT to add something...
Another reason why I deleted my primary HD!!!!!
I forgot to say that it WOULD NOT!!!!! Show up in the STARTUP list as an option...Even After multiple reboots....
But like clockwork... Once I deleted its name IT SHOWED UP as an option!!!!
So back to the next step...
I returned to the STARTUP option under utilities ... And was then able to see MY primary HD now as a startup option...
But ofcourse it had no name because it we previously erased it.
So when Clicking my newly erased HD ... I was almost immediately prompted to REINSTALL the OS ...
Which said it would take about 57 minutes ... But I believe was alot less...
My issue was resolved ... My computer then stated the install was SUCCESSFUL!!!!!!! :))))))))))) lol ;)
It was like I was setting up for the first time ;) asking for my registration info...
The dilemma of deleting the private folder and emptying the trash is finally over resolved. Done ... and no extra money spent!!!!!!!!!
Its really crazy that the information for such a simple thing is not readily available. Especially being such a simple fix.
I know im not the only person who's had this issue , because i've seen numerous posts with similar wording.
I also know I wont be the last person to have this issue... So I hope this synopsis makes sense.
-------One more time the fix------
*Insert your OS dvd into your dvd rom drive.
*Unplug your primary HD or corrupted startup disk
*Reboot your machine...
Upon restart your primary HD will not be recognized...
* you will then be prompted to select your language.
Once selected
*Click Utilities/startup... Highlight the the selection that refers to the OS dvd located in the dvd rom drive.
* Click restart...
!!!!!!!!!!Be sure to reconnect your Primary HD Before your computer restarts and you hear the chime!!!!!!!!
If you do not replug your HD before the chime it will not be recognized.
In that case restart again.
Upon restart once again
*Choose your language...
*Click Utilities / disk utility
In the left column select and
*Highlight your HD ...
Then towards the top portion / center of the page
*Click the heading Erase
Then on the page toward the bottom
*Click security options
This will then provide erase options.
I USED THE FIRST OPTION
"Dont erase data"...
*click OK
* click erase...
Once erased which should take a few seconds
*Cancel the disk utility...
* Click Utilities / startup
And your newly erased HD should now appear in the list.
* Select your drive from the list by highlighting
It should no longer have a name.
*Once selected, you will then be prompted to restart and install the OS to your newly erased HD...
Thats it!!!!
Once everything reinstalls re-add your personal info or registration info and you are up and running.
Goodluck ;)

Computer won't start if ipod is connected

My computer won't start when my ipod (nano) is connected. He stucks in the post screen of the motherboard. Before the pc will check what the boot drive is. So, changes in boot devices in bios won't work. What can be the problem?
AMD Windows XP Pro

mardymar: Windows may be seeing the iPod as a bootable disk....the following link talks about confusion as a network drive and could be cuaisng the same.
http://docs.info.apple.com/article.html?artnum=93499
Did you change your BIOS boot order - I think you might try that if the above link fails to help.

My mac desktop computer won't start and just beebs

My mac desktop computer won't start it just beens loudly. I don't have any lights showing on the keyboard but can hear the drive switching on. I have unplugged the computer, waited and replugged and waited and then turned it on again without and results. Please help.

Use this tip to identify your Mac:
https://discussions.apple.com/docs/DOC-6413
If indeed it has a PowerPC processor (the PowerMacs use that, and have been around since early 2006 simultaneously with some of the Intels), see this tip on beeps:
Power On Self-Test Beep Definition - Part 2
If it is Intel, see this tip:
Mac computers: About startup tones

Powerbook G4 10.4.11 won't start from hard drive . Tried repair, " The underlying task reported failure on exit (-9972).Invalid sibling link,invalid B tree header, invalid map node,invalid record type,the volume needs to be repaired.

Powerbook G4 10.4.11 won't start from hard drive . Tried repair, " Invalid sibling link,invalid B tree header, invalid map node,invalid record type,the volume needs to be repaired.Powerbook G4 10.4.11 won't start from hard drive . Tried repair, " The underlying task reported failure on exit (-9972).Invalid sibling link,invalid B tree header, invalid map node,invalid record type,the volume needs to be repaired.
The underlying task reported failure on exit (-9972).

kauribill wrote:
" The underlying task reported failure on exit (-9972).Invalid sibling link,invalid B tree header, invalid map node,invalid record type,the volume needs to be repaired.
The underlying task reported failure on exit (-9972).
This is a directory issue that Disk Utility cannot fix. Although it manifests itself as a software issue sometimes it may be hardware based. See DiskUtility reports "Underlying task reported failure" when repairing avolume http://support.apple.com/kb/TS1901?viewlocale=en_US". You can try using a utility like TechTool Pro, Drive Genius or Disk Warrior to repair and replace the directory. Another option would be to use the Archive and Install feature to reinstall. If the problem returns after correction you may have a failing or failed HDD.
cornelius

HELP PLEASE!!! Computer won't start up

Help Please!
My computer won't start up, when I click the start up button the light comes only once, sounds click (once) and that's it, no power up.
Because of the age, I knew that the battery could be the reason, so I ordered the exact same battery and replaced it today (following the instructions very carefully). Nothing changed. Then I read about the button for resetting the power management (the one below the ram memory), did that too...and nothing.
I read the manual, it talks about recently installed components (which I have not) and explains the meaning of the numbers of blinks the power light makes with this type of failure, 2 blinks=ram memory, 3 blinks...4 blinks..more than 5 blinks= take it to service.
If somebody could please help me, I would really appreciate
All the best,
Veronica

I had similar problems with my G5 2ghz dual PPC. Mine would turn on, sometimes the startup chime would sound, sometimes not. The fans would run and continue to run faster and faster until I shut it off.
The red light comes on by the way, when the internal plastic shield is not installed or seated correctly.
Anyway, I determined after fooling with the machine for several hours that the symptoms pointed to the video card so, on a hunch, I grabbed a hair drier, pulled the video card and warmed up the video card with the drier. Then reinstalled the video card, hooked up the monitor and hit the power button. Bingo, the machine booted normally. BUT, it would intermittently hang or act odd while running so, I ordered a replacement video card. Installed it and the problem never returned. Sadly someone stole the machine last month but it was in perfect working order at the time:(

HELP! Battery drained and now, even with a power plug, computer won't start

My battery drained completely...and I went to charge it. When I plug the power cord in, it shows "green" not "red." When I remove the battery and just plug in the power cord, the computer won't start either.
Anyone encounter this before after a full battery drain? It's very odd.

I had the same green light non-charging problem. Turns out, I had to replace my wall adaptor. A dealer will have a good power supply you can try.
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Computer won't start from CD!

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