When using the Discussion Boards in a course, it is possible to accidentally change the display of the threads.  If you find that you cannot view any threads within a discussion board, locate the Display button in the upper right corner of the thread and select Show All.

If you still are unable to view your discussion board threads, please contact the Blackboard Support team at 419-434-4357 or send an email to helpdesk@findlay.edu with your inquiry.