This usually means that the unit has become faulty, look in your manual as to how to perform a "Reset" this may,sort the problem. Also check the unit is in clear view of the sky/satellite, as this unit cannot, or thinks it cannot "See" the "Birds" as they are called.
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This usually means that the unit has become faulty, look in your manual as to how to perform a "Reset" this may,sort the problem. Also check the unit is in clear view of the sky/satellite, as this unit cannot, or thinks it cannot "See" the "Birds" as they are called.