I have a cash register SHARP XE-A102 .. and my nephews flattened many buttons when I had it disconnected, and when I connect it again only a noise appears and turns the roll of printing paper and two 00 appear on the screen and turns off and turns on this while doing it on ... Besides, as I have been opening it from the little lever below it does not work either and I don't know how to open it. They had mentioned to me that perhaps he had deconfigured. I hope you can help me with this problem, I urgently need to open the box ...