cnc lathe type: AVENGER 200T
nc：Acramatic 850sx (simodrive)
1 machine occured the alarm" input que low " ,alert no:19099 ,
2 press ALIGN/HOME key,the X/Z axis can move and stop at the correct position,but the light of the ALIGN/HOME is always dark.

please give me some advise ,thangks a lot!