Keying again did not help to solve the issue. I turned off the power at the back of the crate, and turn it on again.
Then the key worked again.
c1iscaux2 is burtrestored and running fine now.
- One of the VME rack on 1X3 is not showing the +/-15V green LED lights.
This is the one on very upper side of the rack, which contains the old c1lsc machine and c1iscaux2. If we are still using c1iscaux2, it needs to be fixed.