Pc was working fine but after updating to the latest bios it got screwed. Keyboard and Mouse aren't working and there's no video display. Fans are working even the HHD. This is so frustrating, I wish I didn't updated it.....
Motherboard: Asus p8z68-v le
CPU: Intel I-7 2700
Video Card: EVGA 580 GTX SC FTW
PSU: Ultra 1200 Watts
RAM: 16GB Ripjaw X
HDD: 500GB Seagate Momentus
Try firstly clearing the CMOS (unplug the power cord and remove the CMOS battery for few minutes). Connect the monitor to the onboard.
If still the same, insert the motherboard's DVD and restart the PC. See if it does recover. If not, you can buy a BIOS chip fom ASUS eStore if in US or ebay (about 17$) and replace the board's one. It's on socket.