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Unability to connect to Local Area Connection - is my cable broken?


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#1 ihabecancer

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Posted 20 December 2014 - 06:28 PM

I don't know how to make sure whether my cable is broken or it's something else causing unability to connect. There is notification saying "Network cable unplugged" but I'm pretty sure it is plugged. Can it be caused by other problems or the cable certainly broken?

 

My internet provider is Alfa. Router Pentagram Cerberus p6360 P 6132-30. Driver for non-working connection is Realtek RTL8168D/8111D Family PCI-E Gigabit Ethernet NIC (NDIS 6.20).



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#2 sflatechguy

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Posted 20 December 2014 - 08:24 PM

Can you connect using WiFi? Can you connect using another computer? That would rule out the router.

 

Try using another Ethernet cable that you know works.

 

Click on the network icon in the lower right corner of the taskbar (this supposes you are using a Windows operating system), click Open Network and Sharing Center, and then click Troubleshoot problems at the botton of the window. This may help identify the problem.

 

Check to make sure the NIC driver is up to date, and that the NIC hasn't been disabled in Device Manager.

 

If you have another NIC or can get ahold of one, try swapping it out and see if that solves the issue.



#3 ihabecancer

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Posted 21 December 2014 - 10:32 AM

Ok, here is new piece of information. I can connect using WiFi. I also found out that my ethernet cable is working perfectly fine but the connection still cannot be established for some reason. My router http://i.imgur.com/EXfQjZn.png Pentagram Cerberus p6360 has 2 ethernet outlets, yellow and blue one(yellow is LAN and blue is WAN). I think one should be giving and the other should be receiving but it turns out that there is one (blue) both giving and receiving and other (yellow) not giving and not receiving. Yellow one seems useless. I came to this conclusion by plugging one end of my ethernet cable to blue outlet and the other end to my PC. My PC recognised cable and gave me such information http://i.imgur.com/A2pq3TM.png and http://i.imgur.com/zqHNhoT.png . In such state i can't browse the internet(this is what i get http://i.imgur.com/Q8r4iXq.png) but it means there is connection between router and my PC right? When i plugged one end of my ethernet cable to yellow socket and the other end to my PC nothings happens as my PC doesn't detect any connection and thinks there is no cable plugged. Another important thing to say is that there is one cable coming from a wall (i don't know where does it go and I'm bad at computers :C) to router, and when it's plugged to blue socket WiFi works for every PC in flat but when i unplug that cable then every computer still detects WiFi but cannot connect.


Edited by ihabecancer, 21 December 2014 - 11:23 AM.


#4 sflatechguy

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Posted 21 December 2014 - 11:40 AM

The blue port is used to connect the router to the Internet. The yellow port is used to connect your computer to the router. By connecting to the blue port, you are essentially connecting to the admin console when you open a browser.

 

So make sure the connection from your ISP goes into the blue port, and the Ethernet cable goes from the yellow port to the computer.



#5 ihabecancer

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Posted 22 December 2014 - 04:10 PM

Ok, blue ports connects to ISP and yellow one connects router and my PC - this was default setting. My coputer tells me that network cable is unplugged. Is the device responsible for receiving WiFi also responsible for receiving cable signal? How do I find out where is the problem located (i already know that cable is ok, since it connected my PC and admin console).



#6 sflatechguy

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Posted 22 December 2014 - 04:21 PM

Make sure the cable for your ISP connection is plugged into the blue port. Can the computer connect to the Internet via WiFi? If WiFi works, check the settings for your LAN.
With the WiFi turned off and the Ethernet cable connected to the yellow port, click the network icon in the far right of the taskbar. Then click on the Local Area Connection link in the middle of the window.
Click on Properties in the lower left. Find the Internet Protocol Version 4 setting, select it, then click Properties again. Make sure it is set to obtain an IP address and DNS server automatically.

If neither WiFi or Ethernet gets you onto the Internet, call your ISP.

#7 CaveDweller2

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Posted 25 December 2014 - 03:29 AM

Try uninstalling the network card and reboot. DO NOT check Delete the driver.....just click OK and reboot. Also....you are going right from the yellow port to your PC not to another router correct?


Edited by CaveDweller2, 25 December 2014 - 03:30 AM.

Hope this helps thumbup.gif

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#8 bludgard

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Posted 26 December 2014 - 01:09 AM

Could be the ethernet port (on router) is toast or broken: It happens....
Try another router?

#9 ihabecancer

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Posted 29 December 2014 - 06:50 AM

Make sure the cable for your ISP connection is plugged into the blue port. Can the computer connect to the Internet via WiFi? If WiFi works, check the settings for your LAN.
With the WiFi turned off and the Ethernet cable connected to the yellow port, click the network icon in the far right of the taskbar. Then click on the Local Area Connection link in the middle of the window.
Click on Properties in the lower left. Find the Internet Protocol Version 4 setting, select it, then click Properties again. Make sure it is set to obtain an IP address and DNS server automatically.

If neither WiFi or Ethernet gets you onto the Internet, call your ISP.

I did that with WiFi turned off and it told me that my cable is unplugged in or may be broken, but that is not the case since I connected WAN port and my PC with that cable and it works (because it glows right?). Internet Protocol Version 4 settings are set to obtain IP and DNS automatically. My WiFi works but it's painfully slow so I wish to connect by cable rather than wirelessly ;/.

Could be the ethernet port (on router) is toast or broken: It happens....
Try another router?

I don't have multiple routers ;/.

 

 

Try uninstalling the network card and reboot. DO NOT check Delete the driver.....just click OK and reboot. Also....you are going right from the yellow port to your PC not to another router correct?

I reinstalled ethernet driver by name Realtek RTL8168D/8111D Family PCI-E Gigabit Ethernet NIC (NDIS 6.20) but I did that by uinstalling the driver and probably deleting it too and then restoring it by clicking "scan for hardware changes" on "Network Adapters" (there wasn't any checkbox about deleting driver so i couldn't leave it blank). Doesn't help.


Edited by ihabecancer, 29 December 2014 - 06:54 AM.


#10 sflatechguy

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Posted 29 December 2014 - 08:09 AM

If you bought the router yourself, try swapping it out with another one. It may be that the yellow LAN port on the router itself is not working.

If your ISP provided that router to you, get in touch with them and have them replace it.



#11 ihabecancer

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Posted 31 December 2014 - 09:45 AM

I used another router which happend to be in my house and it solved my problem. I can finally enjoy HD porn without buffering.






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