crashed hp dv7 bios

[oxiallokarbouno]

Hello.
I am not sure if this is the right section for this post, if not please correct me.
I have an Hp pavilion dv7 1130 ev.
I tried to install mac os x, a totally unsuccessful attempt, and in the process I installed an new version of the bios.
After that it totally crashed.
When I turn the laptop on it shows me the first screen :"Pres esc to enter setup".
If I do pres Esc it promotes me to the F1, F9, F10, etc options, but then it fezzes, and I cant do anything, even if I pres one of the F keys.
If I don't it goes on a black screen and doesn't do anything.
I have been searching google all day long and nothing I've tried worked.
Can anyone please help me?
Tnxx!!