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Ethernet works with one router but wont work with any newer routers

The ethernet port works with my old router but when I got a new router it will not connect. My internet is through AT&T and they have said it was the ethernet port but I am not understand that when it will work with my old router but not any of the new routers. I have even taken the computer to someone for them to look at it and when they hook it up to the internet it will not connect they have Cable internet. Can anyone please help me with this??? I am completely lost and we cant figure out why it wont work with any new updated routers but it will work with my old one that is over 2 years old.

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  • 2,878 Answers

Make sure the NIC card is set to DHCP. ipconfig /all will tell you if DHCP is enabled.


Go to Start > Search (Run in XP) and type cmd ENTER. In the command prompt type ipconfig /release ENTER. Then type ipconfig /renew ENTER. This just refreshes your IP. Test it.

It is located in TCP/IP Properties.

Ethernet works with one router but wont work with  - 11_27_2012_8_29_32_pm.jpg

Posted on Nov 27, 2012

  • Edward Greene Jan 03, 2015

    It's also possible that your provider uses Mac addressing to authorize the modem

    Call your provider and ask for the next level of tech support

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Posted on Jan 02, 2017

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sandrew
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SOURCE: Ethernet not working! Help!

im assuming its not dissabled, if not then go to control panel, network connections and right click on your network card and go to properties then driver and see if there is a code 9 meaning it's faulty or the device is working. if it is faulty then it's part of the motherboard anyway and you will have to buy a pcmcia network card and connect through that instead

Posted on Sep 04, 2007

  • 35 Answers

SOURCE: Ethernet Port Trouble

install the drivers from here: http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=555&l=en&s=biz&&SystemID=PLX_PNT_P4_GX260&os=WW1&osl=en&servicetag=&catid=&impid=

Posted on Aug 19, 2008

jaye_ellen
  • 591 Answers

SOURCE: When can you unplug the ethernet cable from the

This can be done pretty much any time. You want to end up with the modem connected to the router, and router to computer.

Posted on Nov 22, 2009

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If your router works wirelessly but the ethernet ports do not work try using a new ethernet cord. If it still does not work try using another device with the old and new cord. If that still does not work try doing a hard rest on your router and setting it back up. if that doesnt work you may have taken a power surge and they are dead.

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First step is to make sure if the modem is working. Connect your computer directly to modem with ethernet cable and see if you can log on to internet! if yes
next step connect modem to your router's WAN port with an ethernet cable and then connect your computer to one of the LAN ports of router with ethernet cable. Power down all devices and power up modem first wait until all lights are on and then router wait until all lights are on then your computer! 9 out of 10 times this works! try good luck!!

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Hey. I want to use my Netgear WNR1000 as an extra accespoint for better range, is it possible?


Step 1: Make sure your old router is working. Step 1a: Connect the Broadband modem to your OLD_ROUTER's Internet (WAN) port. Then connect the computer to one of the four available ports on your router through an Ethernet cable.
Step 1b: Make sure that the Internet connection is working on your computer and on your wireless devices.
Step 2: Configure your new router
Most routers have an IP address of 192.168.1.1 so before you connect them, you need to ensure that they have been assigned two different IP addresses.
Step 2a: Shut down your OLD_ROUTER and the modem. Also unplug the Ethernet cable from the computer.
Step 2b. Plug the Ethernet cable into any of the numbered ports of NEW_ROUTER and connect the other end to your computer. Switch on the NEW_ROUTER.
Step 2c. Access the web dashboard of NEW_ROUTER (192.168.1.1) and change the local IP address to something like 192.168.2.1 so that there's no conflict with the old router. Save the changes.
Step 2d. Test the SSID name of the new router and make sure it's different from the old router. Also make sure that SSID broadcast is turned on. Save the changes.
Step 3: Connect the two routers
Step 3a. Connect the modem to the Internet Port of the OLD_ROUTER.
Step 3b. Connect one of the number ports of OLD_ROUTER to your computer.
Step 3c. Connect another free port on the OLD_ROUTER to the Internet Port of your NEW_ROUTER using an Ethernet or LAN cable.

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I cant install my router. The internet, power, WLAN, and DMZ lights are all on, but none of the Ethernet port lights are on, but when I try to complete the install I get the following error message: Unable...


If the ethernet light is not coming that means your router is not detecting your computer. Try to plug the computer on any other port.

To check if your ethernet ports are fine you can perform a loop back test. You can take a cable which is not connected to anything. Than put one end of the cable to one ethernet port and put other end of that same cable to any other ethernet port. If the light on the ethernet ports led up means your ports are fine and u need to reinsatll the drivers of the ethernet card on your computer. Else your routers ethernet port are not functioning. If that is the case you can try to reset the router.

Let me know your finding.

**If this works please rate else let me know in case of further help.**

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I'm trying to hookup a usb modem broadband to a router for a desktop and laptop


This wireless router does not have any USB connection on it. Types of connection available on this router are wireless and Ethernet. You can check on the modem if there is an Ethernet port on it.

If your modem has an Ethernet port, I recommend that you test the Ethernet connection using one of your computers. We want to make sure that the Ethernet connection on the modem is enabled. If not, you may need to contact your ISP or the modem manufacturer to make sure that the Ethernet will work before you install the router.

If your modem does not have have an Ethernet port on it. This is not the router that will do the work for you. And I personally does not seen any router yet with the USB port for the modem.

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Ibook wont log onto my network


I ran into this with my home network and my old g3 ibook needed the older speed wifi to connect. I found my old wifi router, hooked an ethernet cable to the newer router (in a regular ethernet port) and connected the other end to the internet port on the old one... they linked and worked fine to provide wifi for the old G3's ..

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The CISCO light is on and the computer has an internet connection, but cannot find the internet. Charter has told me it's a problem with the computer. Additionally, the number light that used to be...


If the number light isn't on anymore, there's something wrong with the physical connection between the PC and the router. About all you can do in this instance is to start "swapping things out".

Try these things in order. They go from easiest to more difficult.

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2.) If #1 doesn't work, try using another ethernet cable...that's the cable that runs from the computer to the "number" port on the router. If the "number" light on the router comes on after doing this, trash the old cable.

3.) If #2 doesn't work, Plug another PC into another "number port" on the router. It's easiest if you know somebody with a laptop. If the 2nd PC lights up the router's "number light", there *is* indeed a problem with your PC...namely the ethernet port. If the 2nd PC *doesn't* light up the number port on the router, your router is probably dead. Note: If you're up to it, you can take note of which cable goes where, completely disconnect the router, and take the router to the PC you want to hook it up to. If you do this, all you need to do is hook up the power supply and the PC's ethernet cable to the number port. You don't have to connect the non-number port.

If there's a problem with your computers ethernet port, just replace the card. I personally like the old Intel E100B's or 3Com 3C509's because you don't have to mess with drivers....just put it in a slot, and any Windows version 98 or or later will automatically load the drivers. If you buy a new card, you'll probably have to load drivers. Do the same thing if the ethernet jack is on-board. The system will work fine as long as only the new card is plugged into the network.

Hope this helps.....

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Automatic installation failure


unless you were switching from DSL to cable Broadband, there usually wouldnt be much reason to rerun the software just because you got a new computer. when you ran the software the first time on the other computer, it was the router you were setting up, not the computer.
if the new computer is not getting internet when hooked to the router, try this.

1.turn off computer and unplug electricity from router and cable modem.

2. connect all ethernet cable to the right location. ethernet from modem to router goes in the non-numbered port, ethernet from your computer to router goes in numbered port.

3. plug in cable modem electricity first, wait for all its lights to come on like normal.(this part is important). the ethernet light on the modem (it might be labeled ethernet, link, pc link, or something similar) will not be lit, this is normal until you get to the next step

4. plug in the router electricity, give the router 2-3 minutes to get connected to the modem.

5. start up the computer, wait for everything to fully load and check internet again.


hope this helps.

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that would be a settings issue for the router..the output of the modem should work on usb or ethernet..can you see the router from your desktop management application?

Oct 22, 2008 | Computers & Internet

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