Powerbook won't boot

I have a powerbook G4 that's about 18 months old. I installed Tiger on it about 3 months ago, and have been having misc. problems ever since. It "spins" regularly, and can take up to 15 minutes to come out of sleep mode to where it can boot Safari.
Today it asked to do the Automatic Update, and began to spin again. I could operate other programs normally (Firefox, MSN Messenger, etc), so I just continued doing what I was doing. Auto Update hung, and I couldn't quit out of it, so I forced the computer to shut down (holding the power button for 10 seconds).
Now it won't boot.
I get the initial boot noise, and have tried to boot it normally, which brings me to the initial screen with the gray spinner, and safe mode (shift key), which does the same and then shuts off after about 45 seconds.
Help, please! I LOVE my Mac and would like to be able to use it.
Thanks!!

Did you run the correct version of DiskWarroir on that drive?
You would need version 3.0.3 for 10.4.5. Any other version will not work and could cause a kernel panic.
If that is'nt it mI have kernel panic help for you if you need it. I really think you need to run the AHT disk though. Too bad you don't have it. Do you or your friend have Tech Tool Pro version 4.1.1? That utility will test all your hardware also.
Cheers!
DALE

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