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Solved: Cable modem cable issue with different computers

Discussion in 'Networking' started by gocubs, Jun 23, 2012.

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  1. gocubs

    gocubs Thread Starter

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    Recently I had to test my cable modem by directly plugging the output cable of the modem to a computer. The problem is that I have 3 computers: One desktop and two laptops. All three computers are running Windows 7, 64 bit and service pack 1. The three computer models are: (1) Dell Vostro, (2) Levovo Ideacentre and (3) Sony Vaio. All computers are less than a year old. When I cpnnect the cable modem RJ45 cable to the Vostro the browser works great. However, when I connect the same cable into either the Ideacentre or the Vaio the browser does not see the signal. Therefore a signal is coming out of the modem (as demonstrated by the Vostro) but I can't figure out why the other two computers don't see the signal? I checked the computer configurations in the command mode but that did not help much. Any ideas?
     
  2. Megabite

    Megabite

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    Howdy,

    Did you unplug the power to the Modem for a minute so it will re set itself then try
     
  3. gocubs

    gocubs Thread Starter

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    Yes, several times.
     
  4. etaf

    etaf Moderator

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    you may need to do a full powercycle each time you change (or possible something to do with Mac Address if the cable ISP uses that information)

    ------------------------------------------------------------------------

    How to power cycle

    “power cycle” process to reboot or reset the modem/router
    • Switch off all the devices modem, router and computers also unplug their power cables.
    • Wait at least 30 seconds.
    • Plug the power cords back in, but don’t switch them on.
    • First turn on the modem and then wait for a few minutes for it to settle and all the lights to become stable.
    • Next switch on the router (if a seperate device ) and then wait for a few minutes for it to settle and all the lights to become stable.
    • Now turn on your computer, You should now be able to access the Internet.
    ------------------------------------------------------------------------
     
  5. etaf

    etaf Moderator

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    crossed post - lets see an ipconfig /all from the working PC and then from one of the none working PC

    why not use a router ?
    ------------------------------------------------------------------------
    ipconfig /all
    If you cannot access the internet with this PC, then you will need to paste the results into something like notepad and then copy onto a machine that can access the internet and post results here

    We would like to see the results from ipconfig /all post back the results in a reply here

    Hold the Windows key and press R, then type CMD then press Enter to open a command prompt box (A new dialogue box - black with white font, will appear on screen ):

    In the command prompt window that opens, 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 > network.txt & network.txt

    It will export the results to notepad and then automatically open notepad.

    Now all you need to do is copy and paste those results to a reply here
    to do that:
    From the notepad menu - choose Edit - Select all
    all the text will be highlighted
    Next
    From the notepad menu - choose Edit - Copy
    Now go back to the forum - reply and then right click in the reply box and paste
    ------------------------------------------------------------------------
     
  6. gocubs

    gocubs Thread Starter

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    I will try the power cycle before I plug the cable modem to each computer and see what happens and post the result. Thanks. The reason I am testing the signal is because I wanted to make sure my wireless router died. I bought a new router and things work but my question remains because it does not involve the router.
     
  7. Megabite

    Megabite

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    If the other PCs are set for 192XXXXXXX then it won't work....you will have to set them to get the IP and DNS automatically.
     
  8. gocubs

    gocubs Thread Starter

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    Thanks ... still on the power cycle test. It's a bit tedious. - gocubs
     
  9. gocubs

    gocubs Thread Starter

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    Ok, solved! The key was to do a power cycle BEFORE connecting to each computer - not just once before the first computer. Thanks very much for solving this little mystery.
     
  10. Megabite

    Megabite

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    Glad your sorted...:)
     
  11. etaf

    etaf Moderator

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    (y) thanks for letting us know
     
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