Boot into your bios. Press the F2 key at the Dell splash screen. Go to the drives section and in the Drive controller make sure it is set to RAID Autodetect/ATA.
After my hard drive crashed, i got a new one, and proceeded to load Windows XP. I did a diagnostic check to make sure that the drive was detected, and it was.  The installation starts fine, but when it asks to press return to load Windows XP, i get the following message: "Setup did not find any hard disk drives installed in your computer. Make sure any hard disk dirves are powered on and properly connected to your computer, and that any disk-related hardware configuration is correct.  This may involve running a manufacturer-supplied diagnostic or setup program." Does anyone know what's going on?  
Loading Windows XP Manually