Brother MFC-L6750DW Online User's Manual page 528

Error Message
Touchscreen
Initialization Failed
Unusable Device
Unusable Device
Remove the Device. Turn
the power off and back
on again.
Wrong Paper Size MP
Wrong Paper Size T1
Wrong Paper Size T2
Wrong Paper Size T3
Related Information
• Troubleshooting
• Transfer Your Faxes or Fax Journal Report
• Replace Supplies
• Load and Print Using the Paper Tray
• Load and Print Using the Multi‑purpose Tray (MP Tray)
• Clean the Corona Wire
Cause
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.
A USB device or USB Flash
memory drive that is encrypted
or not supported has been
connected to the USB direct
interface.
A defective USB device or a
high power consumption USB
device has been connected to
the USB direct interface.
The specified tray ran out of
paper during copying and the
machine could not feed the
same size paper from the next
priority tray.
Action
Make sure nothing is touching the Touchscreen.
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 any debris.
Unplug the device from the USB direct interface.
• Unplug the device from the USB direct
interface.
• Press and hold to turn off the machine,
and then turn it on again.
Refill the paper in the paper tray.
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