Did you ever solve the issue? The only idea that I can come up with is that one of the flexible ribbons has developed a stress fracture in one of the wires which would explain the scanner genreally making the right noises and connecting with the comp...
I have had my 9000F scanner for many years with no problems. I had been using it sucessfully one day, but the next day these same errors came up. I have reinstalled software and drivers several times, used different cables, tried it on Windows 10, Wi...