Anyone with a salt water above ground pool having problems with the program key pad?

I can turn the pump on but I'm having a problem with the touch pad that allows me to control the time of the sanitation cycle. Sometimes it will allow me to program the run cycle and sometimes it won't even beep that I've pushed the button at all. Any body know how to fix this? The pool is three years old, just past warranty (naturally) and a new pump will cost me nearly as much as the whole pool and salt water pump did originally. Any ideas....besides using a hammer on it?