I have had this problem as well. I solved mine with this process. Let me know if this solves yours too.
1. remove batteries
2. take paper clip and touch each battery terminal in calculator together for ten seconds.
3. replace batteries and turn on.
Apparently there is a capacitor that become fully charged and needs to be drained. Contacting the battery terminals together accomplishes this and clears up the display issue. Hope this helps.
Stintz