760gm-p25 fx can\'t enter bios

[Bbkbongo]

I just bought the msi 760gm-p25 fx Motherboard and when I boot it up I can't enter the Bios menu. the manual says to press Del key when you see the message, but there is no message that say it on screen. there is a message that says press any key but then says no bootable device found. i have a sata hd with win 7 installed but no sata optical drives. please help

 

[ScrewySqrl]

repeatedly hit DEL as soon as you power up.

 

[ScrewySqrl]

repeatedly hit DEL as soon as you power up.