FreeBSD CDs don't boot with my Sony Vaio BGN-BX397XP

[Philippe Nenert]

Hello, 

I'have a Sony Vaio BGN-BX397XP.
I'have Windows XP and Mandriva installed, but I want use FreeBSD.
I cant boot with any CD, the system displays rapidly lines on the screen 
incomprehensible, I have a picture for that.

I'have test 6.2, 6.3 and 7.0 beta 4 CDs
 
You can see on back the model SONY PCG-9X1M.
You can have a description of my computer on Sony web site : 
http://support.vaio.sony.co.uk/login/login.asp?site=voe_en_GB_cons
Product Code : 28245051
Serial Number : 5000578

Thank you for your ideas, Philippe