Kyocera KM 3035 copier display panel says:

Check the interlock at the front of the internal finisher where the inner tray locks in. sometimes the connection isn't solid and can lead to this exact problem. 906ing the machine won't fix it as there is essentially nothing wrong with the finisher.

The switch in the finisher that get press by a pin that is setuated on the leftside of copier need to be adjusted or cleaded or replace use a small skrewdriver to activate the switch if it work you now to adjust it if not open and test it with a tester swicth the machine of remove the disconnect the finnesher from copier fi problem is gone the finnesher is the reson fi not it is the wireing to the engin board or engen board on copier fi problum is at finnesher it and the switch is working on finnesher the chek wireing to FN board if that is fine and the wireing to the copier is fine and the conector between copier and fn is fine it is the FN board