Texas instruments Pro problem

CFA General Calculators
#1

Hi I am facing a problem when I compute money weighted return (IRR) I press IRR the CPT and the result is ( RST 0.00 ) so i wonder is it a Calculator damage or a format and what should i do ?

#2

Try changing the battery

#3

I had had the same problem and changing battery definitely helped me after.

#4

#HP12cPlatinum