1) Enter service mode by pressing: MENU, COPY, SCAN, COPY, COPY
2) Select TEST MODE
3) Select (8) PRINTER TEST in TEST MODE
4) Select (3) (eeprom clear)
5) Select (0) (ink count)
6) Press the SET key
7) Press the STOP/RESET key (returning to the state in 3} ), then press power key to power off