Place the steel sheet on the heated bed, if you are running a MK2.5(S) or MK3(S).

Verify that the heated bed is clean.

For MK2.5(S) and MK3(S), verify that nothing is between the steel sheet and heated bed.

To check everything has been wired correctly and to calibrate the printer you need to run the wizard.

LCD Menu -> Calibration -> Wizard

If errors occur during the selftest, please fix them before going further.

Follow the instructions displayed on the LCD screen.