With DH67GD I allways used F7 to update bios, up to bios 132 and it's OK.
To reach the bios try first to hit F2 at high rate after power on, or place the bios configuration jumper on the board in the "configuration" position instead of "normal" (have a look at the quick ref. paper in the box).
The boot failing maybe related to bad disk Controler setting.