How to reset network defaults on desktop printest ( GK420T, GK420D, GC420T, GX430T, GX430D)
Press "feed" button (as show in image below) and hold it until status led will blink 4 times
The Status Led will light amber for 3 seconds, within this time you can do the followings actions:
No pressure "feed" button: restoring factory settings sensors and recalibration