how to start electric mode on Defu RH2 key duplicating machine

Defu RH2 key duplicating machine is a electric and hand dual-use combined horizontal key machine.some users says that Defu RH2 key duplicating machine can not power on , the following is instructions on how to start electric mode .
1, THE SHAFT ON THE RIGHT IS PULLED OUT ABOUT 3CM
2, PLUG INTO THE MAINS
3, LONG PRESS THE START SWITCH FOR ABOUT 3 SECONDS