1. open front cover
2. while front cover is open and machine is on, push "options"
3. push start
4. (quickly) type in '1' then '0' (typing in "10") . if you are not quick enough in this step, start from the beginning
5. the machine says 'accepted'
6. toner goes and goes
it's odd that I had this problem presently after using a compeer toner cartridge (historical Brother) but a new 2nd lot beat.. seems equal Friend cuts up the toner too apace because it entireness superior after this