MB Won't Boot after Leopard

[airkarol]

I just did an upgrade of leopard on a MacBook. Now it doesn't boot. Any ideas why?

Thanks.

 

[unity]

Try booting from the DVD (hold down the C key after the startup chime) and repair the disk and permissions. If its a no-go, archive and install a clean copy.

Did you upgrade? Archive install? Erase and install?

 

[tonycspc]

Same thing happened to me

I'm at the same stage. No disk errors. When I reboot, I get a blue screen with a black cursor error in it.
..I upgraded

 

[unity]

I'm at the same stage. No disk errors. When I reboot, I get a blue screen with a black cursor error in it.
..I upgraded

Did you have APE installed? (Application Enhancer) Its used for some third part software.. cant recall the name right now....