Brother HL 1240 - B/W Laser Printer Service Manual page 247

CHAPTER 1 ABOUT THIS PRINTER
Data (Toner) LED indications
The Data LED indicates the current status of the print data process.
LED Printer status
The printer has no print data.
Off
Blinking The printer is receiving data from the computer or the printer is
processing data in memory.
Print data remains in the printer memory. If the Data LED is on for a
On
long period of time and nothing has printed, you need to press the


button to print the remaining data.
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