Brother HL-5050 - Manual (Page 88)

3 - 6 CONTROL PANEL
Table 1: LED indications after pressing Go and Job Cancel
Make a note of the indication and report the error status to your dealer or a Brother authorized service
representative by referring to the above table.
LEDs Fixing unit
failure
Laser unit
failure
Main motor
failure
Main PCB
failure
Engine PCB
failure
DIMM failure
Toner
Drum
Paper
Status
Make sure that the front cover is fully closed before you report a service call.