Advertisement

There's no such thing as a stupid question, but they're the easiest to answer.
Login
Search

Advertisement

Networking Networking
Search Search
Search for:
Tech Support Guy > > >

Solved: Computer does not recognize LAN


(!)

galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
28-Sep-2009, 08:39 PM #1
Solved: Computer does not recognize LAN
Having a bit of trouble with one of the computers at my house. All of a sudden, after working just fine earlier in the day, it is not recognizing the cable internet connection. None of the usual easy fixes are working (restarting the router/computer, checking for a dead cable/port, etc.) I'm hoping someone can point me in the right direction!

I have a Belkin N wireless router with four computers hooked up to it (one through wireless, three through ethernet cables.) The computer that is not connecting uses a cable and is running on Windows Vista. None of the other computers are having any problems.

When I look at the network icon it tells me it has only local access through an unidentified network. Normally, this would show Belkin N wireless as the connection. This unidentified network is listed as "Broadband Connection: WAN Miniport PPPOE." I have never seen this listed here before. If I try to connect to it, it asks for a username and password.

When I look under "Network Connections," it lists the Broadband connection as disconnected and the LAN connection as unidentified. When looking at the ipconfig settings, I'm getting normal settings except for the autoconfiguration IPv4 address (instead it's the 169.254... that means I'm not getting an IP.) It also leaves the Connection-Specific DNS Suffix blank.

I've double-checked all of the Properties settings for the LAN connection with what's listed on my ISP's website, and it all looks to be in order. Additionally, I cannot even try to reset the connection or update the drivers through the CD, because the first thing it does is try to find the router, and it can't.

I have no idea what else to try next. The only change that has happened to this computer recently has been downloading a codec to view RAW photo files, and I can't imagine that had anything to do with this, as the problem occurred much later. Any suggestions would be greatly appreciated.

Last edited by galaxianomiko; 28-Sep-2009 at 09:09 PM..
JohnWill's Avatar
Computer Specs
Retired Moderator with 106,412 posts.
 
Join Date: Oct 2002
Location: South Eastern PA, USA
29-Sep-2009, 08:55 AM #2
First off, try booting in Safe Mode with Networking and see if you can connect that way.

If not, the next step would be to try this stack reset and see if that resolves the issue.

TCP/IP stack repair options for use with Vista or Windows 7.

Start, All Programs\Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt.

In the command prompt window that opens, type type the following commands, each followed by the Enter key:

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log

Reboot the machine.
__________________
Remember: Data you don't have at least two copies of is data you don't care about.
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
29-Sep-2009, 09:57 AM #3
Hi JohnWill, and thanks for your reply.

I still could not connect in safe mode, and the stack reset also made no change.

Though, now when I click "diagnose why Windows cannot find additional networks", I am getting a message that tells me I do not have a wireless network adapter installed. I hope that's just referring to the fact that this computer has no wireless card.
JohnWill's Avatar
Computer Specs
Retired Moderator with 106,412 posts.
 
Join Date: Oct 2002
Location: South Eastern PA, USA
29-Sep-2009, 03:13 PM #4
Hold the Windows key and press R, then type devmgmt.msc

Please respond to all the following steps.
  1. Under Network adapters, please tell me all the devices listed.
  2. Are there any devices under Network adapters that have a red x displayed?
  3. Also, are there any devices anywhere in the Device Manager display with yellow ? or ! displayed?
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
29-Sep-2009, 03:59 PM #5
1) There is only one device listed under Network Adapters: SiS191 Ethernet Controller

2) No devices listed with a red X.

3) No devices with a yellow ! or ? anywhere in the Device Manager.
JohnWill's Avatar
Computer Specs
Retired Moderator with 106,412 posts.
 
Join Date: Oct 2002
Location: South Eastern PA, USA
29-Sep-2009, 07:20 PM #6
Well, you don't have any wireless capability in that machine, so there's no hope of it connecting to a wireless network.

Since you're connecting with a cable, that shouldn't be an issue.

Let's see this.

Hold the Windows key and press R, then type CMD to open a command prompt:

In the command prompt window that opens, type type the following command:

Note that there is a space before the /ALL, but there is NOT a space after the / in the following command.

IPCONFIG /ALL

Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
Paste the results in a message here.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
29-Sep-2009, 10:30 PM #7
Here you are:

Windows IP Configuration

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

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : SiS191 Ethernet Controller
Physical Address. . . . . . . . . : 00-1C-25-82-CF-17
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::fc3e:81b8:13f2:3fcd%8(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.63.205(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 0.0.0.0
DHCPv6 IAID . . . . . . . . . . . : 134218092
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 Local Area Connection* 6:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{AE688BBD-6991-4C08-8412-D09CE60F4
D74}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5efe:169.254.63.205%10(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Hope that gives you some more information.
TerryNet's Avatar
Computer Specs
Moderator with 66,405 posts.
 
Join Date: Mar 2005
Location: Ottawa, IL
30-Sep-2009, 08:41 AM #8
Strange to get something for Gateway along with a APIPA (169.254.x.y). Maybe some corruption.

Make sure you have the latest ethernet driver from your PC (or motherboard) manufacturer's web site. If you already have the latest driver use Device Manager to uninstall it; reboot and let Windows discover the adapter and reinstall the driver.

If still no go try the post # 2 repairs again.

If still no go please show another ipconfig /all.
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
30-Sep-2009, 02:11 PM #9
Hi, TerryNet. I tried to update the LAN driver, but a window popped up saying that I was already using the best possible driver. So I uninstalled the driver like you said, but could not reboot at this stage because the computer automatically reinstalls the driver every time I try to uninstall it. So I rebooted anyway and went on to try the repairs in the second post again.

This time, when I did the stack reset commands, I got this message for the IPv4 and IPv6 resets: "Reseting Echo Request Failed. There is no user speficied settings to be reset."

Here is what the ipconfig settings say now:

Windows IP Configuration

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

Ethernet adapter Local Area Connection 2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : SiS191 Ethernet Controller
Physical Address. . . . . . . . . : 00-1C-25-82-CF-17
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::9137:7720:5f29:21cd%9(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.33.205(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 0.0.0.0
DHCPv6 IAID . . . . . . . . . . . : 167779365
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 Local Area Connection* 6:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{962C9298-1BB2-4FAC-8D29-5259D3AE9
A83}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5efe:169.254.33.205%10(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

I can't see a difference, though.
TerryNet's Avatar
Computer Specs
Moderator with 66,405 posts.
 
Join Date: Mar 2005
Location: Ottawa, IL
30-Sep-2009, 03:51 PM #10
I don't see a difference either.

You said you checked for a defective cable or router LAN port, so all I can think of is a possibly corrupted non-Windows firewall or security suite (uninstall it if you have one) or a defective NIC.
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
30-Sep-2009, 09:49 PM #11
I uninstalled McAfee to see if the firewall was causing problems, but still no change. Thanks anyway, Terry. Looks like this is the kind of unfortunate mess I'll have to hire someone to evaluate in person. Totally perplexing! I really appreciate you and JohnWill taking the time to walk me through all these repairs, though.
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
01-Oct-2009, 03:42 PM #12
I've got a positive update on this one: turns out it must have been the NIC. I replaced it with a new card, and almost immediately it connected to the Internet. I'm thrilled.

It's doing one weird thing, though. It's not calling the network Belkin N Wireless--instead it just says "Network 4." I also don't get this "Network 4" listing at all in the Network Sharing Center. Do I need to run the CD that came with the router, or change some settings? I just want to make sure this is running correctly.
JohnWill's Avatar
Computer Specs
Retired Moderator with 106,412 posts.
 
Join Date: Oct 2002
Location: South Eastern PA, USA
01-Oct-2009, 07:48 PM #13
The sequential numbering of the network connections is normal, nothing to be concerned about.
galaxianomiko's Avatar
galaxianomiko galaxianomiko is offline
Member with 17 posts.
THREAD STARTER
 
Join Date: Jan 2008
Experience: Beginner
02-Oct-2009, 01:34 AM #14
Thanks JohnWill. So glad to have this solved.
As Seen On

BBC, Reader's Digest, PC Magazine, Today Show, Money Magazine
WELCOME TO TECH SUPPORT GUY!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.


(clock)
THIS THREAD HAS EXPIRED.
Are you having the same problem? We have volunteers ready to answer your question, but first you'll have to join for free. Need help getting started? Check out our Welcome Guide.

Search Tech Support Guy

Find the solution to your
computer problem!




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools


WELCOME
You Are Using: Server ID
Trusted Website Back to the Top ↑