The problem is not a cable going to the floppy or hard drive. If that was the problem, you'd make it through the POST test.
Instead, it's probably 1 of 3 things:
1) Incorrectly seated CPU or Video Card
2) Bad or shorted CPU/Video Card
3) Bad or shorted motherboard
Make sure the specs for everything including RAM and Video card match up. You're not using an old video card, are you?
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~cdogg
[tab]"The secret to creativity is knowing how to hide your sources"
[tab][tab]- A. Einstein