PowerBook - Won't boot after OSX Tiger install

[emmzzie]

Hi,

I have a fairly old laptop - a silver Powerbook G4. It was running on 10.3.9 which yesterday I tried updating to OS X Tiger (10.4).

The install seemed to work fine, and told me to restart. I followed these instructions, but my machine would not boot up after that.

It will 'turn on' - it makes the start up sound, displays the apple on the screen, then after a while moves onto a blue screen with a box in the middle which says Mac OS X, and has a loader bar with nothing loading in it. This stays the same however long I wait.

I found some solutions on other forums but all of the involve starting up in safe mode or booting up with an installer disc for earlier operating system.

I have tried safe mode but nothing different seems to happen. I cannot use an earlier disc because I can't get the tiger disc out of my machine.

Please help!!! I can't afford a new computer, and obviously it is not under warranty any more!

Any advice would be much appreciated!

[Satcomer]

To a disk out of a mac hold down the mouse button while power the Mac up. The Darwin kernel will see that a try to force open the CD/DVD tray.