Brother SB4138 - Manual (Page 168)

APPENDIX
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166
Nothing appears in the LCD
If nothing appears in the LCD when the sewing
machine is turned on, the brightness of the LCD is
either too light or too dark. If this is the case, perform
the following operation.
a
Turn off the sewing machine.
b
While pressing (Cancel/clear key) in the
operation panel, turn on the sewing machine.
c
Press or (Stitch width keys).
Adjust the brightness of the LCD so that the
screens can be seen.
d
Turn off the sewing machine, then turn it on
again.
Operation beep
Each time a key is pressed or an incorrect operation is
performed, a beep is sounded.
■ For a correct operation
One beep is sounded.
■ If an incorrect operation is performed
Two or four beeps are sounded.
■ If the machine locks up, for example, because
the thread is tangled
The sewing machine continues to beep for four
seconds. The machine automatically stops.
Be sure to check for the cause of the error, and
correct it before continuing to sew.
Cancelling the operation beep
When the sewing machine is purchased, it is set to
beep each time an operation panel key is pressed.
This setting can be changed so that the machine does
not beep.
a
Turn on the sewing machine.
X The LCD comes on.
b
Press (Settings key) in the operation
panel.
X The settings screen appears.
c
Press or (Stitch length keys) until is
displayed.
X The screen for changing the beep setting
appears.