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LAN Connection Disappeared?


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#1
burnoutnotfadeaway

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I'm trying to set up my new modem. I had it all connected and was configuring it when I accidentally knocked the computers power cable and the system cut out. I restarted it, there's no problems with it; no device problems or anything, but the Local Area Network has disappeared from Network Connections...what happened? How do I create a new connection? I've got the modem connected to the computer at the moment, both the LAN1 light is lit on the modem as is the ethernet cards light at the back of the computer...so it's definitely communicating?! Thanks
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#2
thenotch

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I am assuming you are using Windows XP?

Is the NIC (network interface card) showing up in Device Manager? If not have you tried to do a hardware refresh to see if it picks it up?

If it is listed check to make sure the NIC is not disabled. I'm thinking this is the case.
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#3
burnoutnotfadeaway

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Unfortunately not. It was enabled, I tried disabling it, restarting, then enabling it, then restarting again to see if it would show up to no avail. Devmgmt is showing it as working with no conflits so I'm totally lost. How do I go about creating a new LAN?
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#4
thenotch

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If it is showing up in Device Manager as no problems, it is enabled, and all external connections are correct you have a bigger problem that just trying to add a new LAN connection.

What I would probably do next is uninstall the NIC, then shut down the PC, remove the NIC completely from the system, restart the system again, then shut it down once more, reinstall the NIC and see if Windows picks it up. If it does not you either have a faulty NIC, a bad PCI slot, or an OS malfunction.
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#5
acklan

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Can you got to Start and then select Run? In the Run box enter cmd. When the command line appears type ipconfig and press <ENTER>. What is the IP address and Gateway IP address?
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#6
thenotch

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Can you got to Start and then select Run? In the Run box enter cmd. When the command line appears type ipconfig and press <ENTER>. What is the IP address and Gateway IP address?


If he doesn't have a LAN interface showing in Network Connections he should get an error when he tries to type that in at the command line as the OS believes the interface doesn't exist and will not bind to anything...

I still think you should do the steps I mentioned above to see if the OS will recognize the NIC with a fresh start.
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#7
burnoutnotfadeaway

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Thenotches idea worked. Thanks alot!

Now, I've set up the addresses for the modem:

IP: 10.0.0.5
Subnet Mask: 255.255.255.0
Default Gateway: 10.0.0.2

Now, Zoom tell me I should enter http://10.0.0.2 into my browser to log into the modem configuration page. Only problem is it doesn't seem to connect to the page. I am given an error in IE saying the "Cannot find the server". Now what do I do?!
I go to cmd, enter ping 10.0.0.2 and the message 'request timed out' message 4 days, with 100% data loss. I got to the same stage earlier before the LAN connection disappeared. I pulled the cables in and out, shook them all about etc, and one time it actually connected with 10.0.0.2 doing a ping test and everything was fine, I went back to IE and entered http://10.0.0.2 and the server error was shown again, so I retried the ping test, and the request timed out error was shown again! What's causing this to happen? I've used 3 seperate cables to connect modem-computer.

PS. When I do the ping test the 'Active' light on the NIC flashes, the Link light is constantly on as it should be, and the LAN1 light is on on the modem. So they are definitely connecting somehow!

Edited by burnoutnotfadeaway, 21 November 2006 - 04:33 PM.

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#8
burnoutnotfadeaway

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While I'm at it. I got a Netgear 10/100/1000 mbps PCI Ethernet Card. Would it be worthwhile to put this in and install it, then try reconfiguring my modem through that than the card I've currently got in the computer?
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#9
thenotch

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Hmm... sounding a bit like a faulty network connection or cable... lost its settings and now intermittently connects...

What you might try is releasing and renewing your IP and then seeing if you can connect to the modem and pull an IP again (open up command window, type ipconfig /release then ipconfig /renew)... if you get a 169.x.x.x address I would replace the cable and then try again... if you get the same results then I'm betting you have a faulty network interface or ethernet cable.

Also, are you sure the address to connect to is correct?? Could it possibly be https://10.0.0.2 instead of http://10.0.0.2??

Also, do you have a firewall installed which may be prohibiting your connection to the modem?
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#10
burnoutnotfadeaway

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Well I closed my firewall and avg as instructed, so it's not the firewall blocking access. I shall try the technical side later when I get home then post back regardless if it works or not. Thanks for your help
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#11
burnoutnotfadeaway

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I tried the ipconfig /renew in cmd and got the following message:

The operation failed as no adapter is in the state permissable for this operation.

I've no idea what that means, switching the modem on/off doesn't change it, nor does resetting the modem. I've stopped using the onboard port and added a NIC card and attempted to reconfigure the modem using the NIC but the same error is also given.

I'm totally clueless?!
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#12
thenotch

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I'd say you have a faulty NIC... that response means that most likely it won't be showing in your Device Manager again...

I'd say it's time to replace it.
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#13
burnoutnotfadeaway

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That's the thing. The NIC does show up in the device manager, and it's enabled too. So I know the system is actually picking it up, whether or not it works is a whole different story. I'll try get hold of another one and see what happens.
Thanks again :whistling:
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