HP Prime bricked after update

[rprosperi]

It is still difficult to understand, due to translation challenges, though we understand you are trying your best to explain.

You mention "damage to flash" many times, caused by the f/w. Why do you think it is damaged, what evidence of damage so you see, what are the precise symptoms? What exact steps do you follow and what are the results?

Without exact information, it isn't possible to narrow down the cause, so these details are needed to understand cause and possible solutions.

Also, have you tried to re-format the flash using the diagnostic menu?