Brother HL-5440D - Manual (Page 83)

77
General Information
3
Main PCB Failure
Turn off the power switch, and then turn it back on and try to print again.
If the error occurs again, call your dealer or Brother Customer Service.
Cover is Open
Close the fuser cover located behind the back cover of the machine.
Duplex Disabled
Put the duplex tray in the machine and close the back cover.
Jam Rear / Jam Duplex
Clear the paper jam.
See Jam Rear / Jam Duplex uu page 131.
If the machine does not start printing, press Go.
LEDs Machine Status