Mac book won't boot after security install

Question

I've experienced major issues ever since the update to 10.5.5. I've performed the disk repair a few times, but the computer kept freezing, or it would quit my application with no warning, so I did an archive and install. It seemed to be working fine, although safari wasn't showing some content, so I ran the software update to update the system to see if it would work better. It was closing safari a few times, but after the security update tonight, I cannot get the system to boot.
I've held the shift key to try and start is safe boot... that worked once, when I went to restart it wouldn't start. I've tried to start form the DVD, it won't start by holding the c key at start up.
I've tried the option key at start up and selected the DVD, won't start.
Several times I'll get the gray screen with the apple for about a minute, then the computer just turns off.
Any suggestions besides take it in to get serviced?

Answer 1

Kimg wrote:
I also tried the fsck thing..there were some errors showing.. and the end message said something like it cannot repair.. then exit 8.
It's always better to boot into the Safe mode (hold down Shift key during boot) rather than manually run fsck. The safe boot runs fsck.
I hope the Apple Care will take care of the issue.
It may not be your HD. It could be that all your data are intact but that a controller or some other hardware is bad.
Whenever we install software, updates, etc., we use areas of the HD that were unused. This is why it's not a coincidence that many failures occur during a software install/update. Updates exercise hardware much more than do many standard apps. Even when storing a large file, a failure does not do much damage, but when installing a system program or update, any HD failure can result in disaster.