You can find the usre's manual here:
http://welcome.solutions.brother.com/bsc/public/us/us/en/doc/manual_index.html?reg=us&c=us&lang=en&prod=hl2140_all&dlid=&flang=English&type2=-1
1) If the LARGE BLUE BUTTON is blinking:
Data remaining in memory
There is remaining print data in the printer memory. If the
Ready LED is blinking for
a long time and nothing has printed, press the
Go button to print the remaining data
in the memory.
2) If the TONER LED is blinking:
Toner low
Indicates that the toner cartridge is nearly empty. Buy a new toner cartridge and have
it ready for when
Toner life end is indicated.
The
Toner LED will turn on for 2 seconds and off for 3 seconds.
3) If the DRUM LED is blinking:
Drum life end soon
The drum unit is near the end of its life. We recommend that you get a new drum unit
to replace the current one. See
Replacing the drum unit on page 69.
The
Drum LED will turn on for 2 seconds and off for 3 seconds.
4) If the RED ERROR LED is blinking:
Front cover is open
Close the front cover of the printer.
Fuser cover is open
Close the fuser cover located behind the back cover of the printer.
Paper jam
Clear the paper jam. See
Paper jams and how to clear them on page 85. If the printer
does not start printing, press the
Go button.
Memory full
The printer memory is full and the printer cannot print full pages of a document.
Print overrun
A print overrun occurred and the printer cannot print full pages of a document.
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