Perfect binder keeps dropping pellets straight down. Everything checks out in I/O mode and it knows home position. Say the machine finishes a booklet, if you open the front door or even the top glue pellet holder it automatically drops the pellets and the shoot never moves over the glue tank and it will code out with the c1567. Both Boards have been replaced, wiring harness, sensors and shoot motor. Any thing at all you can think of that might be the issue. KM was onsite and now they are recommending replacing the boards again, the temp sensors and the glue tank. Thanks