ok,,l did  switch test, found ball trough number 1 is staying open, trough 2 and 3 are closed, shows on the screen,,but trough 1 shows open on the screen, lt still clicks, when you click it manully , on screen shows open, tested with my MM, shows ok,, has a diode,, could it be that, how do l test a diode? l never touched any of those when l changed the real rubber.. will try the camera trick,,

regards john