If Braille pins are stuck in up position or down position.
Use the steps below to clean the display when movement of pins is impeded by dust and dirt. It is also possible to test the Focus buttons for problems.
The key and controls test ensures that each of the keys and controls operate
properly. You can begin the key test after entering Diagnostics Mode by pressing any of the keys below, the output should show as per below.
DOT 1 = 1
DOT 2 = 2
DOT 3 = 3
DOT 4 = 4
DOT 5 = 5
DOT 6 = 6
DOT 7 = 7
DOT 8 = 8
Menu = mnu
Left Shift button = kls
Right Shift button = krs
Spacebar = ksp
Left Panning button = pl
Right Panning Button = pr
Left Selector Button = sl
Right Selector Button = sr
Left NAV Mode Button = nml
Left NAV Rocker Up = nlu
Right NAV Mode button = nmr
Right NAV Rocker Up = nru
Right NAV Rocker Down = nrd
Left NAV Rocker Down = nld
Left Rocker Switch Up = rlu
Left Rocker Switch Down = rld
Right Rocker Switch Up = rru
Right Rocker Switch Down = rrd