+ 0 Votes Reponse To Answer robo_dev 3 years ago Ergo: the classic - 'short between the headphones' fault - 'loose nut behind the wheel' problem. - PICNIK ("Problem In Chair, Not In Computer") error - ID-10T error Like when years ago a user was reporting a completely dead mainframe terminal. Yup. dead as a doornail. So there are no lights at all? None. Except for the green light on the edge and the flashing square on the screen. Flashing square? Yes. After giving up on the phone and dispatching a tech, somehow the user had adjusted the terminal so the color of the font was the same as the background color, and the square was the cursor.