Dell Optiplex 755 - Error "Floppy Diskette Seek Failure"

I need help resolving this error on my Dell Optiplex 755. At first the computer was showing the error "Floppy Diskette Seek Failure" on the screen, so I went ahead and Hit F2 to go into the BIOS menu and disable the "Onboard or USB Floppy Drive" in the Boot Sequence folder. I then when to Drives>Diskette Drive>OFF. Hit Esc and save & rebooted the computer. 

The error doesn't show up anymore and the Dell startup image boots up, however it does not take me to the Windows page. I tried starting it up on safe-mode and normal mode with no success. Just a black screen. Even try checking the LED light, all 4 lights are off, the only light on is what looks to be a Battery symbol next to the 4th  light. 

Any ideas?

Thanks