Brother MFC-640CW User Manual page 172

7
If you replaced an ink cartridge while Near Empty was
displayed on the LCD, the LCD may ask you to verify that it was
a brand new one. Example: Did You Change Black? 1.Yes
2.No. For each new cartridge you installed, press
pad to automatically reset the ink dot counter for that colour. If
the ink cartridge you installed is not a brand new one, please be
sure to select
If you wait until Ink Empty message is displayed on the LCD,
the machine will automatically reset the ink dot counter.
If the Install message is on the display after you have
installed ink cartridges, check that the ink cartridges are
installed properly.
WARNING
If ink gets in your eyes, irrigate them with water immediately and call
a doctor if you are concerned.
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