With the install Disc inserted, restart & hold Option key at bootup, see if it';s a boot choice.
Tough without the Install disc, but some things to try...
Does it boot to Single User Mode, CMD+s keys at bootup, if so try...
Repeat until it shows no errors fixed.
(Space between fsck AND -fy important).
Resolve startup issues and perform disk maintenance with Disk Utility and fsck...
Just recently I ran into a problem when I tried to Verify my hard disk and when it tried to verify the catalog, it responded "Invalid sibling link." Repair Disk didn't work. I searched the web and Apple's site, and couldn't find anything useful except to buy DiskWarrior or reformat the drive. Knowing that OS X is built on Unix gave me a few clues on how to proceed. The solution is pretty simple:
1. Boot off the OS X CD (reboot, hold C while booting).
2. The installer will load up, go to Utilities in the menu and run Terminal.
3. Type df and look for the drive that has your Mac system mounted---you'll have to unmount this. On my MacBook Pro, it was /dev/disk0s2.
4. Type umount /dev/disk0s2, replacing disk0s2 with whatever disk your OS lives on.
5. Type fsck_hfs -r /dev/disk0s2. If you umounted the wrong thing, it will complain that you can't repair a mounted drive. Go back and umount the right thing and repeat this step.
Just for fun, you might want to run another fsck_hfs on your disk (use the -f option because your drive is probably journaled). Hope this helps someone so they don't buy a program that's going to do pretty much what we did with fsck_hfs, and so they don't waste time searching for an answer to no avail. By the way, TechTool Deluxe (3.1.1) didn't find the Catalog problem for some reason (you'll have this on a CD if you have AppleCare), which is why I resorted to fsck.
When holding down the Option with Disc in there is no number Just the items I mentioned above.
When I tried your other ways a bunch of computer program text came up. But, the keyboard doesn't work to type anything.
Is there a way I can just wipe the entire HD when it's like this? I have all the programs I need on disk so I can just redo everything.
Thanks again for the help. I have a date with the Genuis Bar this Sunday. But, I'd like to try to do this myself.
I'm not the most computer literate person alive. But, I'm not an idiot either. I'm guessing what you're saying is because I have nothing with a usable 10.6 system available the computer won't turn on. Is that correct?
The reason I'm asking is because I bought this HD years ago and there was nothing on it. What did I do then, that I can't do now?
Thanks Again for your help.
I thought the 2z number was on the HD on the computer that's not working. I have the install disc and I've been using it for the things you've been telling me to try. I have to use it on an external DVD player because the one on my G5 hasn't worked in years.
The number on the Install Disc is 2z691-6178-A
Thanks for all your help. One last thing I'm going to try before tomorrow,maybe you can help.
I bought a seagate internal HD. I removed the HD that doesn't work, put in the new HD, attached the cables. I put the INSTALL DVD in and turned on the computer. All I get is a flashing little mac symbol and question mark.
I tried turning it on while holding down the option key and that didn't work.Neither did holding down the C and turning it on.
Is there something else I can try?
If you have another Mac with Firewire & a FW cable, put the Install Disc in the other Mac, boot the Other Mac into Target mode...
And boot this one with the option key.
I went to the Genius Bar yesterday. Somehow I fried the original HD, the people there had no idea what was going on with it. It took 2 hours for them to get the new HD up and running. When the uploading was down to "about a minute" some little girl was a milimeter from pushing the off button. It's all good now.
Thanks again for the help. It'sgreatly appreciated.