Boot problem after 1st installation

[DarioC]

Hello,

 

After some problems to install mac os x on my laptop (Fujitsu-Siemens Amilo Si1848), installation Atiwas fine... but when I restart after the grey apple screen... a black screen is only think i can see.

 

Some help?

 

On my laptop I've 2 partitions: Win Xp and Mac Os X 10.4.8.

The Apple partition is still active and primary.

I think is a boot problem... but how to fix it?

 

 

Laptop spec:

 

CPU Intel Core 2 Duo 2 Ghz

2gb Ram

Ati Radeon X1300

Sata HD 120GB

 

Some help?? PLEEEEEEEASE!