1) With the printer powered off but connected to a power source, press and hold the Stop/Reset button for 4-5 seconds.
2) Without letting go of the Stop/Reset button, press and hold the Power button. Then, press the Stop/Reset button two times without letting go of the Power button.
1 time Orange Service pattern print
2 times Green EEPROM print
3 times Orange EEPROM reset
4 times Green Waste ink counter reset
Then turn off the printer, press once or twice power button to turn it all off.