Sharp PC-7221 Configuration Problem

I have two Sharp PC-7221 lunchbox computer and both have "invalid configuration information" error upon booting. And to press "F1 to continue". I press F1 and then it says there is "no boot device available." When I boot from FDD, it boots ok. I figured that the Hard drive just needed to be formatted and FDISKed. So, I run FDISK but it returns that there is no Fixed Drive in system. But they are present.... I can see them... they spins up and the drive is initially accessed upon booting without floppy. That is, the HDD light comes on for about 1 second. Someone suggested that I could remove the internal battery and it would boot up with the default configuration. I tried that but it didn't change anything. Is this just something that can be fixed with the proper configuration? Anyone have the files for the configuration disk? Can you send them to me? Are they available on the internet? Thanks in advance. Mike