Hi there,
I had to change the battery in my calculator and sg went wrong with the settings (especially the time value of money calculation gives silly number for YTM like 17,8 instead of 1,45). Is there any preliminary setting I should use to refine my calculator? Online manuals did not help 
Thank you
To reset the BA II PLUS or the BA II PLUS PROFESSIONAL calculator, please follow the procedure below (this procedure will work for both the old and new case designs).
• Press [2nd] [+/-] [ENTER]. The display will show “RST 0.00” if the reset is successful, then all of the manufacturer’s defaults will be restored. Manual reset procedure for the BA II PLUS and the BA II PLUS PROFESSIONAL (this will only work on units with the updated case design). • Using a paper clip or the tip of a pen, press the small RESET button on the back of the unit. The display will show “RST 0.00”, and all manufacturer’s defaults will be restored.
Many thanks!