Hi Bob. Thank you for your suggestions. I'm not an electronic expert, but I'll try to do what you said. The most worrying thing is that when something turns on, it is stuck; I mean, it's not that, without hearing any sound, I can operate on the buttons; they stay on or off, even if I push them. The same for the lcd panel; there's something written on it, but it doesnt' make sense and it is frozen. Maybe I didn't point it out properly in the first post, I apologize. So: can the battery down cause such behaviour? Or do you think is something else, and the battery has no fault for such behaviour?