I manage IT for several clients in Central Florida, where we have quite a lot of lightning (the most in the U.S.). I have one client that has trouble keeping electronic devices alive. We have replaced several network devices. I suspect there is a problem with the grounding or surge/lightning protection. I am not worried solely about that electrical system. The ethernet network seems to be a problem as we keep losing individual ethernet ports on devices. Some of the devices keep working, but individual ports are dead and we just move connections to previously unused ports. But it is not clear to me if the hardware is dodgy or the facility is more vulnerable than others.
I have previously asked this on networkengineering.stackexchange.com and the only advice I got was to hire an electrician. I can do that, but I am not sure I can trust someone to not just sell me a lot of remediation services that do not improve anything.
Is there a device I can buy or a process I can follow that can show me what, if any, wiring is bad? I have a simple wall plug AC outlet ground tester widget that I plug into outlets that tells me if the something is obviously bad, but that doesn't help me with surges or ethernet.
If I do hire an electrician, I would like some way to verify this personally without relying on someone else.