Brother HL-7050N - Manual (Page 100)

CONTROL PANEL 3 - 16
HL7050_US_UG_FM5.5
Liquid Crystal Display (LCD)
The display shows the current printer status. When you use the
control panel buttons, the display will change.
If you take the printer off-line, the display changes to show the
emulation you have chosen.
If there are any problems, the display shows the appropriate error
message, maintenance message or call service message so you will
know that you need to take action. For more information about these
messages, see Troubleshooting in Chapter 6.