1) With the printer powered off but connected to a power source, press the Power button while pressing and holding the Stop/ Reset button.
2) When the Power LED is lit, press the Stop/Reset button two times while pressing and holding the Power button.
3) When releasing the Power button and the Stop / Reset button (regardless of order), the printer will move into a service mode. (Waiting for menu selection)
4) Open the tool and reset your printer
link: http://www.mediafire.com/file/nhzxdwimowv/service mode tool 105.zip