Brother MFC-890 User Manual page 140

Media Card Indicator Lights:
LED light is ON, the media card is inserted properly.
LED is OFF, the media card is not properly inserted.
LED is BLINKING, the media card is being read or written to.
Do NOT unplug the power cord or remove the media card from
the PhotoCapture Center
writing to the card (LED is blinking). You will loose your data
or damage the card.
LED
™
while the machine is reading or
WALK-UP PHOTOCAPTURE CENTER
™
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