http://jamet.com/Fanuc_Web_Manuals/C...cy/63005en.pdf
I guessed at your control that is on your machine.
The above link is to a maintenance manual for a 21i control.
Around page 300 or so is the reasons why FANUC would not function and NOT give an alarm.
If it is a Daewoo (Doosan) ladder issue, trace can be used to compare sections of operations that do function to one that does not.
Instructions for how to Trace on a 16i/18i/21i re located in the Tec Docs post dated 05-09-2015, 08:22 PM on this thread: https://www.cnczone.com/forums/daewo...bulletins.html