The LCD goes off and K1C goes offline after start priting.

My K1C suddenly stop to print any model. The LCD screen goes off and K1C goes offline every time I start printing. I can meke it go home, or start self checking but self check aborts and goes offline. After that I can restore the screen only by power cycling the printer. There’s no error code printed on screen because the screen shows nothing but black. How can I restore the printer from this situation??