I have HP Scanjet 3770. UBUNTU 10.04 installed on my desktop. HPLIP also installed. This scanjet working well in Windows Xp but in ubuntu SimpleScan does not recognize it. It shows:-
No scanners detected
Please check your scanner is connected and powered on.
I Also visited http://www.sane-project.org/
& found as below-
ScanJet 3770 Unsupported. While an external binary-only backend exists, it works only on Linux i386. Therefore the scanner is unsupported on other platforms.