[split] Help with update

[Christian Choque]

Regards. Maybe someone could help me, I installed the new firmware of hp 2.1.14425 of my calculator but I had a problem a week with the calculator, it turned off and did not want to start I could not start it either by using the combination C, F, O + on or the Reset function until you remove the battery. In addition to that error, I observed a very frequent and noticeable flickering during the use of CAS, so perhaps they could recommend an earlier version of the more stable firmware, please.