I have a stash of RB411's/RB133s in my drawer and most of them have broken Ethernet ports. The ethernet ports usually break after heavy weather, or major power surges/spikes. (I can connect to the board through the wireless interface)
This tells me that I may have an earthing problem, which is very puzzling to me, as we make sure during installation that our earthing is correct, so is the equipment that we use, enough?
The equipment we use to earth our RBs are as follows.
Shielded RJ45 plug
We wind the earth wire from the shielded cable around the shielded plug, on both ends of the cable. The one side plugs into the RB, and the other side plugs into the POE. The POE plugs into the home electric system, with a three prong plug(Live, Neutral, Earth). So provided the home electrical system is earthed correctly, or if the POE is connected through the UPS, then the earthing should be fine. But I still get RBs with broken ports. It seems as though the problem is in actual fact going through the client PC, through the POE and up to the RB. Is this possible?
Is it possible to replace the ethernet ports on the boards?