Hi
The CMOS is a chip which keeps the settings for the BIOS.
Pressing f1 when requested will take you stright to the relevent section section in the BIOS.
Try different combinations with the floppy and cable (i.e. change the cable round e.t.c).
If there is nothing on the hard drive then you will need to get the floppy working or try changing the BOOTUP settings in the BIOS to boot from CD, then try booting with a bootable CD.
Good luck
The settings in the BIOS for the HDD, are they the right settings for that drive?
If not they will need to be changed. If the motherboard is a new board then there will be a setting in the BIOS to auto detect the settings.
You'll need to navigate around the BIOS via K/b, so if the k/b aint working properly then you'll need to try another one.