Brother HL-4200CN - Manual (Page 111)

TROUBLESHOOTING 5 - 22
The Alarm Indicator is On or Flashing
The red alarm indicator on the control panel indicates that there is a problem with the printer. Refer to
the sections below.
The Alarm Lamp is On
When the alarm lamp is on, it indicates a paper jam or other problem that you can rectify yourself. Rectify
the problem according to the message displayed on the control panel.
For detailed information about the meaning of error messages, see What to Do When an Error Message
Appears on page 5-16 and correct the error as instructed.
The Alarm Lamp is Flashing
When the alarm lamp is flashing, it indicates a problem that you cannot rectify yourself. Write down the
message and error code displayed, turn the printer off and contact your dealer or Brother Customer
Service.
Ready Alarm