A) Make sure that Channel Schedules are configured right in terms of start date and times.
- Go to Channels.
- Select the Channel that you are using.
- Click on the Schedules tab.
- See the list of schedules, and control their start date, time, and time zone.
B) Make sure there is no mistake in terms of AM/PM settings. OMMA uses 24-hour time format. For instance, to select 1:30 PM, you should click 13:30 on "Starts" field.
C) If you manage timing by using Campaign Dates or Time Range functions in display rules inside the playlist, make sure start/end dates and times are correct. Also check AM/PM settings.
E) Make sure your device is connected to the internet.