I have just tried to use a DeWalt chop saw that was unused but has been sat around for a little while. after plugging into the outlet for the first time and pressing the trigger it started up as expected, but as soon as i tried to use it again nothing happened, the outlet is definitely working and there is a click when the trigger is pulled but no sound or movement apart from that. If anyone could tell me what it might be that would be awesome, thanks.