Consider the Scenario:
1:) ChangeAuditor coordinator log (changeauditor.service.exe.nptlog) is not getting updated.
2:) Coordinator service keeps failing when started from Coordinator tray or from Services console.
3:) No new entries in the Application Log for the failure to start the coordinator service.
1:) Increase the Log size for Application log and ensure the retention is set to "overwrite events as needed"
2:) Can clear Application logs if required.