Mine croaked a couple days ago. Thirty months since we bought it.
Guessed the Power button was shorted and saw the photo fix. We had been leaving it unplugged and only plugged it in to do 30 sec warmups, mostly coffee. Decided to take my keypad apart and removed the tin spring piece in the touch pad. Re assembled and no countdown like before but only RESET would work. I am not convinced a new touch pad would fix the problem, but until I can find a schematic. I suspect that the touch pads have an RC filter to prevent multiple signals from one press, a common problem on computer keyboards. I also found some solder splatter on the circuit board but after cleaning it all off, the problem continues.
The touch pad is available from several sources, including Amazon, so I'm not worried about finding one if/when I can be certain that is the problem.