Acer 4965G BIOS

Hello everybody,
I have a notebook Acer 4965G working fine until a couple of months ago. Suddenly, (without reason), stopped working with wifi and audio. After some attempts the wifi got back to normal, (it was a contact problem), but audio no way, (and the audio is controlled by slide controls on keyboard, terrific). Also I have tried to upgrade its own bios downloaded from Acer website. I did the upgrade and starting from that moment there is nothing to do with it. Turning it on i have just a blank screen, nothing blinking, nothing else appears. I was thinking to try and re-flash the bios but, stupid me, i guess i cannot do that seen that the notebook seems totally died. Is there anything i can do to get it back working? Thank you for any kind of answer.