Some days ago my iPronto stays sleeping even when I pressed a key or touched the screen. So I did a reboot and than the problem occured: I received the first screen saying "cleaning ressources...", second the music prior to booting came and than the boot screen with the flashing iPronto logo appeared. But this was it... I unplugged battery & ac adapter: no change. I let the iPronto boot more than 24 hours. When I came back, it was still booting.
So I tried to update the firmware in the way I described in my prior thread. And this was the solution: I received an error message "Network card not found". I opend the cover of the network card, released it, put in in again and started the update again. I received that not update was needed, the iPronto booted and now it's still back to live.
You can imagine how happy I was. And I learned something: It seems that booting is hanging, when the network card isn't inserted properly.
Maybe this will help you when facing the same problem than me!