I just removed the newest display board and put the old one back in. This time I hadn't turned the power off because I figured it was just low voltage. Changed the display and as I was putting it back, the touch pad seemed to be working. My first thought was maybe one of the cables I had installed wrong, but before I could get all the screws back in the touch pad quit working. So I changed back to the new display and the same thing happened. It works for just a little while and then as time go by the sound just gets weaker. This actually doesn't take more than a minute or two. It acts like it runs out of power for some reason. The old display you can still see faint numbers (time) the new one you can't see anything. Before I had turned the power off, and before I could get back to the oven, I guess it had lost enough power to make anything work.