I had to "jump" the jumper.
It's solved now
I am having a similar issue with my logitech g510 keyboard and z77-ud5h mobo. It is powering on at post but I am unable to get into the bios. What do you mean by "jump the jumper"? I am in need to fix this problem because the boot disk is set first so booting to the dvd drive or usb is impossible.