Author Topic: Ethernet problem  (Read 8665 times)

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Offline Bellzemos

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Ethernet problem
« on: October 18, 2012, 11:44:19 PM »
Hello!

I need some non-Avast-related help. I bought a new laptop - Lenovo G770. I installed Widnwos 7 and all the drivers but I can't connect to the internet by cable. Only wireless works. When I connect the cable the connection icon shows an exclamation mark. Troubleshooting says that my local area connection doesn't have a valid IP configuration. If I connect my other laptop (Sony Vaio) to that same cable the internet works without problems there.

I formatted the Lenovo disk, installed all the drivers, tried many things - nothing. Please help. :)
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Offline polonus

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Re: Ethernet problem
« Reply #1 on: October 18, 2012, 11:53:04 PM »
Does you have the right IP version installed? Open up a command prompt and type "ipconfig /all" post the results for your Local Area Connection here,

polonus
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Offline Bellzemos

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Re: Ethernet problem
« Reply #2 on: October 19, 2012, 01:25:38 AM »
Hello Polonus!

I don't know if I have the right IP version installed. Wireless connection works, but the cable connection doesn't. Here are my results:

C:\>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : haha-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Atheros AR9285 Wireless Network Adapter
   Physical Address. . . . . . . . . : 44-6D-57-02-1C-65
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::b9e7:8563:93ad:8064%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : 18. oktober 2012 23:48:43
   Lease Expires . . . . . . . . . . : 19. oktober 2012 2:48:44
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 306474327
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-12-12-9D-DC-0E-A1-D8-06-18

   DNS Servers . . . . . . . . . . . : 192.168.1.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Atheros AR8152/8158 PCI-E Fast Ethernet Controller (NDIS 6.20)
   Physical Address. . . . . . . . . : DC-0E-A1-D8-06-18
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::5dcf:55d:d78e:b404%11(Preferred)
   Autoconfiguration IPv4 Address. . : 169.254.180.4(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . :
   DHCPv6 IAID . . . . . . . . . . . : 249302689
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-12-12-9D-DC-0E-A1-D8-06-18

   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{574A0CD9-78B3-4DA9-9723-DC9DAAEDBFF7}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{F1C28E68-E813-4836-8C5F-7FA9B9293758}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:5ef5:79fb:8f0:164:3f57:fe9b(Preferred)
   Link-local IPv6 Address . . . . . : fe80::8f0:164:3f57:fe9b%14(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled
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Offline Bellzemos

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Re: Ethernet problem
« Reply #3 on: October 19, 2012, 03:27:45 PM »
Can anyone help me please?
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Offline Bellzemos

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Re: Ethernet problem
« Reply #4 on: October 19, 2012, 04:39:44 PM »
I tried /flushdns, /release and /renew (ipconfig commands), but the problem is still here. Renew gives an error: unable to contact DHCP server. What can I do?
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timcan

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Offline Charyb-0

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Re: Ethernet problem
« Reply #6 on: October 19, 2012, 11:57:42 PM »
Try running Farbar Service Scanner-  http://www.bleepingcomputer.com/download/farbar-service-scanner/
Please post the log file.

Also, use Troubleshooting in control panel to troubleshoot network errors. See attachment. Not sure if this is what you meant by troubleshooting in your first post.

Go to Device Manager in control panel then network adapters to make certain there is no Ethernet error.

Are you hardwired to the router or hardwired directly to your modem?

What firewall are you using?

The Sony connects, I would compare settings with the Lenovo to see what is different.
« Last Edit: October 20, 2012, 02:18:05 AM by Charyb »

adotd

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Re: Ethernet problem
« Reply #7 on: October 20, 2012, 02:04:00 AM »
try this

click start

click control panel

click Network and Internet link

click change adapter settings

right click Local Area Connection

click properties

click internet protocol version 4

make sure obtain ip address automaticaly

+ obtain dns server adress automaticaly

click ok to the 2 windows :)

Anthony.

Default Gateway . . . . . . . . . :

it seems you are missing a default gateway in your settings.
« Last Edit: October 20, 2012, 02:10:10 AM by adotd »

Offline Bellzemos

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Re: Ethernet problem
« Reply #8 on: October 20, 2012, 03:32:38 AM »
Thank you all, very much! I've messed around today with it and the connection established only when I entered the other laptop's IP, gateway, mask and DNS. At least now I know that my laptop/ethernet card isn't faulty. :) I will try the stuff you wrote me when I have time - and then post back. Again, thanx! :)
Intel Core i7 Q 740 @ 1.73 GHz, 6 GB RAM, Windows 7 Ultimate x64 SP1, Avast! Free Antivirus, Malwarebytes Anti-Malware (free version) and Sandboxie (paid version).

dansorin

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Re: Ethernet problem
« Reply #9 on: October 20, 2012, 10:37:19 PM »
actually, something like this happened to me some time ago, but the other way around. on my desktop (W7 SP1), hardwired to my router, I lost the internet connection. after using without problems the desktop for more than a year, all of the sudden my ethernet connection had the yellow exclamation mark on it and refused to connect to the internet. no matter what i tried, i couldn't fix this. the only solution was to buy a wireless card. even today i still don't know what went wrong.