Mine was doing the same thing (actually still is). Somehow the membrane switch completely stopped working. I was able to verify that it was bad by shorting a few contacts on the pin header that the button membrane attaches to. There is a pin on the end that is ground. The other 5 or so go to each button. It you short across the ground and one of the other contacts you should hear a beep. If your good you can trace which contacts go to each button. I actually do that to change the speed, etc. It's a pain, but it works in a pinch.
|