Hi Peggy,
Welcome to the Heartland Owners Forum and to the family. We have a great bunch of folks here with lots of information and all willing to share their knowledge when needed.
You might give ASA a call (877-845-8750) and ask for help. First I would unplug the unit from power and see if it might reset. Sometimes electronics get their own mind set and maybe unplugging will erase what ever is wrong.
Be sure and check out our Heartland Owners Club. Join us at a rally when you can and meet lots of the great folks here and make friends for a lifetime.
Enjoy the forum.
Jim M