Many C5 Problems, they just stop for no reason



We are an industriel integrator in Quebec Canada, Since a couple of month many of my C5 just stop to work, No more light from the etehernet port? Anyboby had this issue before?


Normally I only get this issue after lighting storms or a real good hail storm. What do you do for grounding your C5s?


We had the same problem with a few C5.
If they are under warranty, return for RMA