switch fans stopped working. switch is in production environment so I had to replace fans with similar specification fans, not noctua but really loud 3 pin industirial fans. they spin and all ( they are like 9000 rpm fans ). but the fan led, even though not solid amber any more, still lights up amber for a second and goes back to green and then back to amber and so on. where can I source replacement fans that are compatile with the switch, that will keep the amber Fan led from going on?