Running an alignment this morning and noticed that ALS X-ARM was stuck.

• Symptoms: 
  • Green Arms ndscope was 0 for X-arm WFS signals (this was a new one to me)
  • ALS Overview had a RED box for AutoCenter for the EX WFS Indicator.
  • Went to ALS-X Conotrols Overview and focused on WFS-related stuff.  Noticed that all the WFS DOF filter banks had no inputs/outputs
  • Eventually noticed a RED box on the ALS-x Overview which was the Auto Center again, so I opened the adjacent TRIG box.  
• On Triggering box, clicked FORCE (from AUTO) for Auto Centering, and this immediately brought signals to all ALS-x WFS!  Returned ALS-x back to AUTO and moved on with alignment.