Ethernet connection not working since a power cut

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kiwigirl

8 posts

Wannabe Geek

#171723 29-Apr-2015 09:47

My modem router (Netgear N600) is set up in my office and plugged into an ethernet port. There is then an ethernet port hub behind our TV for all rooms in the house. We had a power cut the other week and since then the ethernet port behind the tv is not working (hence not working anywhere) except in my office where everthing is normal. My tv guy has tested the CAT5 cable in the wall and says it is reading fine, we bought a new port hub (in case the power cut damaged it) but still have no internet from that point. Then I thought it might be the modem/router so purchased another Netgear and have tested it and still the same problem, do you have any ideas please?

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471 posts

Ultimate Geek

#1293367 29-Apr-2015 10:07

Take the existing ethernet hub/switch that is behind the TV and physically take it to the router and plug it in using a cable. Plug a laptop or whatever into the hub to test that you have connectivity.

If that works then it has to be the cabling between the lounge. When the hub is behind the TV and plugged in does the link light come up on the port it's plugged into?

Can you plug a laptop into the cable behind the TV after removing the hub and get access?

timmmay

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#1293376 29-Apr-2015 10:33

So you have a modem/router in your office, a cable to behind your TV, and from there a switch distributes ethernet to the rest of your house.

It sounds like you've tested the cable, the switch (not hub), and the modem/router, and all report fine. I guess either the client is broken too, or you need to retest your switch and router more carefully. It's a process of elimination that could be a pain to do.

kiwigirl

8 posts

Wannabe Geek

#1293379 29-Apr-2015 10:40

Hi thanks for the reply, to be honest it's such a jungle behind the tv unit I might just wait for the TV guy (who's coming back) to try those options, he's tried a few options and been asking around. To be honest when he tried a cable direct from the modem to the port hub and it didn't work I thought it must be the modem but I bought a new one to try and that hasn't worked plugged into the Ethernet in my office, I don't have a long enough cable to try from the modem to the port hub so will have to give that a go when the TV guy comes back. Will post back any results. Many thanks

kiwigirl

8 posts

Wannabe Geek

#1293392 29-Apr-2015 10:48

Hi Timmmay, yes sorry it is a switch not a hub, yes I think we need to go through a bit more process of elimination too and getting frustrated so that is why I am trying to think of all options as well (even though I am far from qualified in this field but I do like to solve a mystery!).

timmmay

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#1293396 29-Apr-2015 10:53

You haven't said what your client is - is it the smart TV? Can you try plugging it directly into your router? TVs are heavy, but it will help the process.

kiwigirl

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Wannabe Geek

#1293399 29-Apr-2015 10:57

Sorry, not sure what you mean by the client?

Jase2985

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#1293439 29-Apr-2015 11:48

client = device that plugs into switch to communicate over network

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Jase2985

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#1293440 29-Apr-2015 11:49

sounds live you have spent a lot of money to faultfind thins when there is a lot of things you could have done for free first to narrow down what is actually wrong.

timmmay

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#1293500 29-Apr-2015 12:52

kiwigirl: Sorry, not sure what you mean by the client?

What are you plugging into the network that isn't working? TV, laptop, etc.

richms

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#1293511 29-Apr-2015 13:03

Have you turned everything off and back on again? Is there another switch in a wiring cupboard or panel or something somewhere that could have died and not be connecting the ports together?

Richard rich.ms

kiwigirl

8 posts

Wannabe Geek

#1293512 29-Apr-2015 13:04

Hi we have TV's and pc plugged in, they were working fine before the power cut but now the tv says network cable not plugged in and the pc just doesn't show the network. The switch after the power cut was flashing all lights, so that is why we replaced it, the new one shows the power light but no lights come up for the ports even though they are all plugged in. Also the cable from the modem to the wall in my office doesn't show a light, but the cable from my modem to my office computer does.

richms

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#1293515 29-Apr-2015 13:05

Does the cable go straight from that TV to the ethernet switch or does it go via wall plates and inbuilt wiring?

Richard rich.ms

kiwigirl

8 posts

Wannabe Geek

#1293520 29-Apr-2015 13:12

Hi

All the cat5 cables come out in some wall plate system in the wall and are then wired into cables that go into the switch, my daughters pc comes through that way, the tv goes straight into the switch, there is no on/off system I can see.

Amosnz

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#1293531 29-Apr-2015 13:13

My old mans router got hit by lightening recently and the internet light was flashing (no line sync). Before he came through to get a spare router I thought we'd log into the web gui of the router and check, so I confirmed the LAN light on the router was on but when we did an ipconfig it reported 'media disconnected'. I told him to bring the computer through with him and it did the same thing when i plugged it into my switch, link light comes on but ipconfig reports media disconnected and it doesn't get an ip.
The lightening must have come into the router, jumped to the lan side and gone through the cable to the computer and physically taken out something on the network card.

Relevance to issue above - depending what caused the power cut, the devices plugged into it may have sustained damage too.

Speedtest

richms

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#1293533 29-Apr-2015 13:15

Actually that is a good point. Depending on your excess you might be better to start to look at this from a perspective of what has died and will insurance pay to repair/replace.

If no light comes on with a direct connection between your new switch and the TV or router or whatever (forget your internal wiring for now) then try another cable, and if still no link light, one of the devices is dead.

Richard rich.ms

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