Just for your future knowledge, you passed the POST when you saw the splash screen. Everything passed that is the BIOS starting up. Any video = POST passed.
Am I missing something or did you just not post your hard drive in the specs for your system. If you got to a blank screen past the BIOS splash screen w/ no HD that may be why all you got was a blinking cursor. Especially if the BIOS had never had a HD stored in its configuration.
Sorry, noticed this after I posted... I do have a hard drive in there. The problem now is I'm not getting anything at all when I press the power button, not even a blank screen.