One or more toner cartridges are not installed or not installed correctly.
Pull out the drum units. Remove all of the toner cartridges, and then put them back into the drum units.
DCP-L3551CDW, HL-L3210CW, HL-L3230CDW, MFC-L3710CW, MFC-L3770CDW
If you need further assistance, please contact Brother customer service:
Please note this form is used for feedback only.