I tried checking out my slider plate,to see if there is any discoloration on it. I took the cover off the fines box, and was able to lift the plate off the arm that moves it in and out, but it doesnt come out far enough to remove it, because it hits on the control board and its wires. Do I have to remove the control board, or am I missing something? Also, and ,just curious, where is the chain that drives the auger, and if need be, how do I get to it? Thank you.