I've got a low end Brother MFC printer/scanner/fax, which works fine for printing in all ways, but won't scan. How can I diagnose what's wrong? I see a lot of contradictory and old advice here and elsewhere.
Some console output is:
# brsaneconfig4 -q | grep 480
59 "MFC-7480D"
145 "MFC-J480DW"
# brscan-skey -l
MFC-J480DW: brother4:bus2;dev2 : USB Active
# scanimage
scanimage: open of device brother4:bus2;dev2 failed: Invalid argument
# grep 04f9 /lib/udev/rules.d/40-libsane.rules
ATTRS{idVendor}=="04f9", ATTRS{idProduct}=="2038", ENV{libsane_matched}="yes"
ATTRS{idVendor}==”04f9″, ENV{libsane_matched}=”yes”
# lsusb | grep Brother
Bus 002 Device 005: ID 04f9:0384 Brother Industries, Ltd
What steps can be taken, in general, to figure out why a Brother MFC scanner won't work?
My specific configuration is MFC-J480DW connected via USB to Ubuntu 16.04 with drivers downloaded directly from the Brother website. I see https://help.ubuntu.com/community/SettingScannerPermissions
