You can see a list of events for your LogicMonitor Collector from Settings | Collectors. Typically the displayed events include errors related to data collection tasks and the stopping/starting/restarting of the collector services. Looking through these events can be helpful for debugging issues with your Collector.
To view Collector events, navigate to Settings | Collectors and locate the desired Collector. Select Manage, and then select Collector Events from the Support dropdown menu in the Manage dialog: