Brother MFC-J650DW Basic User's Manual page 110

Error Message
Paper Jam [Rear]
Touchscreen Init.
Failed
100
Cause
The paper is jammed in the machine. Remove the jammed paper by
Paper dust has accumulated on the
surface of the paper pick-up rollers.
The Touchscreen was pressed
before the power on initialization was
completed.
Debris may be stuck between the
lower part of the Touchscreen and its
frame.
Action
following the steps in each section
below:

(MFC-J650DW)
Printer jam or paper jam
(MFC-J650DW) on page 106

(MFC-J870DW)
Printer jam or paper jam
(MFC-J870DW) on page 112
Make sure the paper length guide is
set to the correct paper size.
If there is a repeat paper jam, a small
piece of paper may be stuck in the
machine. Make sure paper is not still
jammed in the machine by following
the steps in each section below:

(MFC-J650DW)
Additional paper jam clear
operations on page 109

(MFC-J870DW)
Additional paper jam clear
operations on page 116
Clean the paper pick-up rollers.
(See Advanced User's Guide:
Cleaning the paper pick-up rollers.)
Make sure that nothing is touching or
resting on the Touchscreen,
especially when plugging the
machine in.
Insert a piece of stiff paper between
the lower part of the Touchscreen and
its frame and slide it back and forth to
push out the debris.