All I can tell you is that -x is safe mode, and -v is verbose mode,
I would start by booting -v and either take a pic of the screen or write down the contents and ask people about that,
Basically at the moment all your saying is my computer won't boot up why is that?
You need to give people something to work with, also not sure this is the right place for this post. try your next post under leopard or snow preboot