If I am sending this message it is because for several days I have not been able to use my piano which, when I turn it on, the LEDs activate again and again with the black screens. No matter how much I searched for the problem and tried the different solutions offered on the "Native Access" site, none of them worked. I've had my piano for 5 months and I haven't had any problems before. On top of that, my computer no longer recognizes it. Please help me.