Question Lightning struck twice and now ethernet is stuck at 10 Mbps ?

[ShanRoxAlot]

Lightning struck our house or house adjacent, followed by a second strike a minute or so later. The internet went down for a couple of minutes. (It was back up before I got to the modem to restart it).

The aftermath left our Lutron system partly down and apparently the AC was blasting due to thermometer misreading temps in the 200s.

But the issue I am trying to understand is with the ethernet port in my room where the router shows no internet connection with, but when I plug in my PC directly I can connect but only 10 Mbs service. Wired and wireless speeds used to be 300 Mbs. I can connect to an another access point somewhere else in the house with my phone and get an 90Mbs, so the modem still seems capable. What gives?

 

[white.a.drew]

Lightning struck our house or house adjacent followed by a second strike a minute or so later. The internet went down for a couple of minutes. (It was back up before I got to the modem to restart it).

The aftermath left our Lutron system partly down and apparently the AC was blasting due to thermometer misreading temps in the 200s.

But the issue I am trying to understand is with the ethernet port in my room where the router shows no internet connection with, but when I plug in my PC directly I can connect but only 10 Mbs service. Wired and wireless speeds used to be 300 Mbs. I can connect to an another access point somewhere else in the house with my phone and get an 90Mbs, so the modem still seems capable. What gives?

You may need to update your driver's for one, for two the lightning probably shorted something if your aren't using surge protectors

 

[bill001g]

Lightning can be very strange. I have had it burn out ports on equipment that was protected by both surge protection and UPS. It did not even damage any of my UPS but killed power supplies and ethernet ports, even a on board video port on one machine.

So I would start with a machine that will properly get 1gbit when you connect it directly to the router with a short cable. You can now work to eliminate what is broken. My prediction is it is the port in the machine and it now has issue running with longer wires and has other issues preventing it from running above 10mbps.

It is not likely the wire itself but with lightning who knows. The most common issue if it works on a direct cable is there is some problem with one of the wall plate jacks. Most you should be able to remove a bit of wire and then re terminate the wires. There is a special punch down tool to do this but you can use a small screwdriver if you are very careful not to damage the center part of each connector.

 

[USAFRet]

Lightning can be very strange. I have had it burn out ports on equipment that was protected by both surge protection and UPS. It did not even damage any of my UPS but killed power supplies and ethernet ports, even a on board video port on one machine.

Yep.

I had one that killed ethernet ports on 2 different items, a PC and printer, that were separated by 2 switches and a router, and on different UPSs.
(among other things that died that day)

 

[ShanRoxAlot]

I think the lightning made a cable(or port possibly) go bad. I swapped ports on the modem and seemed to fix it.

 

[bill001g]

Could be it burned out just that one port. It is not likely it is the cable itself it takes a lot more power to damage simple metal. You would likely smell it or see melted. A port just very high voltage can cause damage. Even a static discharge can damage stuff which is why they say to always use grounding straps. Hard to say it seems so random as to what gets damaged and what does not.