How to downgrade CASIO Prizm fx-CG20?
Posté: 09 Juin 2021, 22:04
Hi,
I´m trying to downgrade a CASIO Prizm calculator but I can´t seem to find an answer for it. I saw somewhere that by pressing the F2-4-AC/ON and Restart once the calculator was turned off, I would be prompt to a black screen so I then I would press 9 and install the OS. But nothing happens. Currently the calculator is in version 3.1.02
Thank you in advance
I´m trying to downgrade a CASIO Prizm calculator but I can´t seem to find an answer for it. I saw somewhere that by pressing the F2-4-AC/ON and Restart once the calculator was turned off, I would be prompt to a black screen so I then I would press 9 and install the OS. But nothing happens. Currently the calculator is in version 3.1.02
Thank you in advance