Cpu upgrade Asus Notebook

I'm going to upgrade my F5VL Notebook from T5450 to P8700. I've already bought processor, but after fitting it into socket computer starts but there's only black screen. I have NB SIS 671/FX/DX/MX Rev. 00 and SB SIS 968 Rev. 01 . BIOS is AMI ver. 213 from 12/25/2007.
I couldn't find any cpu support list for this notebook. Is there something I can do about it? Please help me. Someone could modify the bios or tell me which processors are compatible with my asus?
Thank you