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This problem is the most common in this model
1-Run manual toner for bk and check if the bottle moving or not by hearing its voice or seeing it directly by opening the upper cover and closing the switch
2-if it moves try to make manual toner many times
3-if not that mean the toner pump is blocked and locked by toner and it may cause damage the motor and the motor will damage its port for power from the IOB
4-so don't change the motor or the board before remove the blocked toner that located inside the pump
5-you can do it by changing the complete pump and this very complicated process or you can change the Spiral part located inside the pump that damage by the blocked toner
6-first remove the motor you will found 2 small gears put a paper under them and remove the bottom one carefully so the Spiral part not Separated try to clean all the toner inside don't forget to remove the toner bottle first .
7-get a new one and inset it carefully by spinning it
8-now try a new motor if not working try a new board but my advice if the motor was damaged it will damage its port in the new board again so change the motor and the board together
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