Ok now that I get a good nights sleep and more info on your problem it come to me what we are looking at the only thing is it can be more the one thing. Please only do the things I list one at a time.
1) checked the ide cables first On cd-rom, floppy drive, hard drive and also that the hard drive jumper is set as master (red edge of ide cable facing power and red edge on mother board is set to the power pin) ( if the green light on your floppy stays on that cable is not set right)
after checking all try to boot system.
2) remove the ide cable from your cd-rom and the power core and try to boot system (if it does boot most likely the cable is bad and you will need a new one)
after removed both cables (still unplug) try to boot system
3) if one of the frist two did not fix it then its a bois setting that not set right it may be tring to boot your system from a network.
How do you feel on makeing bois setting changes?