CLAUSING -ATLAS # 8520 MILLING MACHINE 110Volt Hooked up to power and Running

CLAUSING -ATLAS # 8520 MILLING MACHINE 110Volt Hooked up to power and Running. Preowned milling machine has been maintained kept in running condition for use small shop and is hooked up ready to use now. Has had digital readout and mechanical adjustable stops added and mounted on milling machine. Milling machine in running condition, digital readout not working, or I do not know how to work it and or turn it on.