I have the same problem and I traced it to the ribbon cables used in the console. These ribbon cables are used to complete the connection for all the contols on the conslole. I have reseated these cables several times and the treadmill will work fine for a short time. I am still looking for a long term solution. This is a very bad design. a replacement console is over $300.00 from Proform.
Rich Stedman, February 2009