good day just working on canon ir3570 when I give a copy command it keep on showing me "close the main cover unit's right cover" at the top of the LCD and after about some 30 milliseconds it shows now "check covers are closed" at the button of the LCD. this two information keep on switching automatically. the machine had a heating problem which i finally change the heater and which i have test with another machine of same number and it working fine. pls help me out. thanks in advance.