tonymfacebook wrote:
Thank you. I press the button and there is silence.
Excellent! That very much narrows down the issue.
My first guess is that it's a problem with the interlock -- either the brake isn't being depressed enough, or there's a problem with the brake switch. A cheap and easy experiment, when this problem happens, would be to try holding the other brake while starting to see if it changes.
If one brake works but the other does not (in this context) then it's probably a dodgy brake switch.
Next possibility is that the kill switch (if equipped) is dodgy -- flipping it back and forth a couple of times is worth trying.