the lights on the buttons come on and go off on bumps. opened and looked behind the buttons. there is no obvious problem with the electrical connect. anyone has the same experience?

 

If all the buttons are doing this, the problem is something common to all the buttons, not the individual buttons. Maybe unplugging the wire harness on the backside and replugging it might help. This would clean any 'dirty' connections.

 

It is all the buttons. I have done unplug/plug the wire harness many time in the past months and have used the dustoff air can. There is no change.