The "HD is required" will appear if any of the hardware required for scanning is not present. I ran into this before. The machine required a Format Converter Board to scan. Basically, that board coverts the raw image data into a "computer Friendly" format. As far as I can tell, the scan function uses the board to relay info to the HD, thus if there is no board, it doesn't see the drive.
Not all models require this board to scan, but most require it to retrieve files in a useful format (like PDF)
Bookmarks