Press `2nd`
Press `+` to open `MEM`
Select `7: Reset`
Choose `1: All RAM`
Choose `2: Reset`
Press `2` to confirm
Wait for the calculator to restart
Press `2nd`
Press `+` to open `MEM`
Select `7: Reset`
Choose `1: All RAM`
Choose `2: Reset`
Press `2` to confirm
Wait for the calculator to restart