My HP 48 died :( stuck in recover memory screen

[Enric2008]

I have resurrected my hp48g a couple of times, after being stuck with the "try to recover memory" message, by pressing all the buttons at the same time with a rigid plastic cover of a sharp pc 1403 I have at home. I'm not sure if it's the fact of pressing all the buttons or something behind the keyboard receives pressure, but the thing is in my case it works.