As a followup to my previous post regarding our GE dishwasher; GE did send a wiring diagram 5 days after I emailed them but by then I had found one. I could find no in depth information on troubleshooting the main control board other than running the internal diagnostic on the machine which kept telling me it was reading the door switch open. I had continuity all the way through the switch and wiring harness to the main board connector so I knew it was working. Do to the odd symptoms I took an educated guess, also known as the WAG method which I hate throwing expensive parts at things to see what happens but, got a new main control board and installed it. Unit is happily running a load of dishes as I type.Wife VERY happy. Hope this helps some other poor slob sitting cross leg in front of his dishwasher with a confused look on his face. Good luck, Bustedstuff.