I have a SX3 converted to CNC (with the CNCfusion kit). Went to start it up last weekend and spindle won't turn

power light is on - LCD lights up - and it beeps if I push the down arrow - but "start" doesn't work.

Mrpackethead... the control panel and LCD and motor from hishine are a direct replacement for the original parts???? They're not listing a 8000 rpm on their site at the moment - do you have a link to the one you bought?