After the machine is powered on, the mainboard indicator light flashes green, and a "beep, beep" sound is emitted when the button is pressed.
2.1 The machine failed to recognize the G-code file on the TF card or the connection failed to recognize the printing file.
2.2 The contact of the mainboard TF card slot is poor.
3.1 Check whether there is a sliced G-code file in the TF card, and only one can be saved.
3.2 Check whether the TF card is properly inserted, reinsert the TF card.
After checking the above steps, if the problem still cannot be solved, please contact after-sales service cs@creality.com