network cable is unplugged when it is not : Windows 7

I have been using windows 7 and suddenly my LAN stopped working and it says that network cable is unplugged when it is infact connected. It does not work with most of the cables. I tried swapping it with a patch cable and it worked. Strangely it works only with this cable and does not work with normal cable. Don't know why. I have tried changing the link speed for my realtek adapter it didn't help either. I am able to connect using D-Link type CPI 24 AWG CAT SE UTP LAN cable only.
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  1. That is sign of lower tension. Check motherboard for bad capacitors and power source on 5V line. If all ok, it could be the network adapter itself failing. Just get an PCI network adapter add-on card.

    PS: As far as i know there is no difference between "normal cables" and patch cords... other than length.
  2. I had the same problem and after much cussing I discovered the solution. I had this trouble when I was doing a clean install of Windows 7 and the internt would work until I updated the Realtek driver. The weird thing is that I've done clean installs before and installed every new driver I could get, but this time, no. So I went to the device manager, selected the realtek lan in the network menu, right clicked, Properties, Driver tab, clcked the "roll back driver" radio button. Instantly I had internet.

    I don't know what this means,except that I'll probably be getting a discrete LAN card soon.
  3. navidb said:
    I have been using windows 7 and suddenly my LAN stopped working and it says that network cable is unplugged when it is infact connected. It does not work with most of the cables. I tried swapping it with a patch cable and it worked. Strangely it works only with this cable and does not work with normal cable. Don't know why. I have tried changing the link speed for my realtek adapter it didn't help either. I am able to connect using D-Link type CPI 24 AWG CAT SE UTP LAN cable only.
  4. I tried everything listed and then some. What worked was unplugging cat5 from router and into another port. killed 7hrs trying to fix before doing so, even contacted realtek and dell.
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