After BIOS update, black screen, No light

[nobby-qvp]

Hi,

This is my first post on this web site. Hopefully I am posting right place.

I have Envy 700-327C with Windows 7.
 
After I update the BIOS which I downloaded from HP site, my monitor is black and no light on the computer. But every about 50-60 sec, a light is flash, and fans are running at full speed. Also I can not turn off the computer with power switch.
 
I tried to do BIOS recovery using window's key and B key, but it doesn't do anything.

I have no idea how to fix my issue. Any suggestions will be appreciated

Thanks in advance