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 Post subject: Faulty network card?
PostPosted: Tue May 24, 2011 2:59 am 
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Joined: Thu Feb 10, 2011 4:37 am
Posts: 38
Location: Singapore, Singapore
This might sound rather weird. On my X61 (running Windows 7) whenever I connect a network cable to its Ethernet port, its status will quickly blink over to "Identifying..." before switching back to "Network cable unplugged" again. I've tested the cable and the router with another laptop and it works fine, so the fault is probably with this particular machine.

I've also tried using a dock's ethernet port instead to see if it is something related to the physical port on the laptop, to the same effect... so chances are the actual network card is busted. Can it be? I've never encountered a bad network card before. Could it be some other BIOS setting that I've missed out on?


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 Post subject: Re: Faulty network card?
PostPosted: Tue May 24, 2011 3:50 am 
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Joined: Thu Apr 12, 2007 8:23 am
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There isn't a separate card for Ethernet on the X6X series. The Gigabit Ethernet is integrated into the systemboad (motherboard). What happens if you run another OS, like a Linux Live CD?


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 Post subject: Re: Faulty network card?
PostPosted: Tue May 24, 2011 7:44 am 
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Location: Singapore, Singapore
Harryc wrote:
There isn't a separate card for Ethernet on the X6X series. The Gigabit Ethernet is integrated into the systemboad (motherboard). What happens if you run another OS, like a Linux Live CD?


Great tip! After I've booted up from a Ubuntu LiveCD, it worked. And a subsequent reboot into Windows works too... so it is probably just some weird thing going on :)


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 Post subject: Re: Faulty network card?
PostPosted: Tue May 24, 2011 8:07 am 
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Location: Singapore, Singapore
Gah. Seems like it happens intermittently... my guess is that somehow it can't receive an IP address via DHCP.


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 Post subject: Re: Faulty network card?
PostPosted: Tue May 24, 2011 8:10 am 
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It happens intermittently in both Windows and Linux?


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 Post subject: Re: Faulty network card?
PostPosted: Tue May 24, 2011 8:35 am 
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Joined: Thu Feb 10, 2011 4:37 am
Posts: 38
Location: Singapore, Singapore
Harryc wrote:
It happens intermittently in both Windows and Linux?


Yeah. I'll try to hunt around my room for a spare cable and report back again. The cable has lost its "click" so that might be the cause, but even when I hold the connector by hand to the port, it still does the same thing...

And weirder still, other machines don't have that problem using that very same cable.


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 Post subject: Re: Faulty network card?
PostPosted: Tue Nov 22, 2011 9:33 am 
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Joined: Tue Nov 22, 2011 9:28 am
Posts: 5
Location: Philadelphia, PA
Sorry to resurrect an old thread, but I'm now having the same problem on my X220. What was your resolution? Was it a hardware or a software issue?

In my case, it works fine at home, but fails at work. If another computer is connected to the same port (with the same cable), it works fine. I don't think I'm getting an IP address correctly. I reinstalled the ethernet adapter, made sure all settings are default, did a netsh resest...no help.


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 Post subject: Re: Faulty network card?
PostPosted: Tue Nov 22, 2011 10:08 am 
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Joined: Mon Sep 18, 2006 5:17 am
Posts: 13854
Location: Mt. Cobb, PA USA
You probably run W7. Check this article: http://www.windowsnetworking.com/articl ... ation.html

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 Post subject: Re: Faulty network card?
PostPosted: Tue Nov 22, 2011 4:35 pm 
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Joined: Tue Nov 22, 2011 9:28 am
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Location: Philadelphia, PA
Thanks, RealBlackStuff. I do run W7 Pro, and tried the troubleshooter, etc. Nothing seems amiss in settings; it just keeps cycling through Enabled --> Identifying... --> Network Cable Unplugged. But only at work! Works fine at home.

SmallWalrus said via PM that his was a hardware issue resolved by a mobo replacement. Since it works at home though, I find it hard to believe that it's a hardware problem in my case...I could do a system restore or factory reinstall, but that's a pain.

I'll check with IT here at work, maybe call Lenovo tech support, and report back.


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 Post subject: Re: Faulty network card?
PostPosted: Tue Nov 22, 2011 5:51 pm 
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Joined: Mon Sep 18, 2006 5:17 am
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Location: Mt. Cobb, PA USA
If you use Access Connections, disable it and let Windows manage connections.
Maybe your (software) firewall prohibits access at work?

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 Post subject: Re: Faulty network card?
PostPosted: Tue Nov 22, 2011 8:03 pm 
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Joined: Thu Feb 10, 2011 4:37 am
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Location: Singapore, Singapore
I think ours are different problems :)

I ruled out the OS being the cause by booting up under Ubuntu. No go there either. That helped me conclude it was the chip on the motherboard.


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 Post subject: Re: Faulty network card?
PostPosted: Wed Nov 23, 2011 2:35 pm 
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Joined: Tue Nov 22, 2011 9:28 am
Posts: 5
Location: Philadelphia, PA
I tried a fresh install (ugh) and the problem persists. IT at work will be looking at it soon (maybe after Thanksgiving) and we'll see from there. The mystery continues!


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 Post subject: Re: Faulty network card?
PostPosted: Fri Nov 25, 2011 11:42 am 
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Tell me about the network? DHCP? Domain controller? Do you have another machine connected? If so, what are the settings?


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 Post subject: Re: Faulty network card?
PostPosted: Tue Nov 29, 2011 9:42 am 
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Joined: Tue Nov 22, 2011 9:28 am
Posts: 5
Location: Philadelphia, PA
Thanks for the input. IT came to check it again. The jack and cable work fine with other computers, and my computer still won't connect even running Linux. So it looks like a hardware issue; I'll put in a call to Lenovo.


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 Post subject: Re: Faulty network card?
PostPosted: Wed Dec 21, 2011 3:34 pm 
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Joined: Tue Nov 22, 2011 9:28 am
Posts: 5
Location: Philadelphia, PA
Conclusion: I had the system board replaced, and it works fine now. So, it was the same problem as OP. Thanks for all the support!


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