Brother MFC Series Service Manual page 242

Color LCD models (non-touch panel models)
<Screen 1>
Completely blank
<Screen 2>
All black
<Screen 3>
All gray
<Screen 4>
All red
<Screen 5>
All green
<Screen 6>
All blue
<Screen 7>
White stepwise
1-line LCD models
<Screen 1>
<Screen 2>
<Screen 3>
<Screen 8>
Red stepwise
<Screen 9>
Green stepwise
<Screen 10>
Blue stepwise
<Screen 11>
Stroke detection
<Screen 12>
All gray
<Screen 13>
Image data
5-20
Confidential