Ethernet Link Keeps Going On and Off

Discussion in 'MacBook Pro' started by Fahd, Jan 10, 2007.

  1. Fahd macrumors regular

    Oct 26, 2003
    I have an issue with a MacBook running Mac OS X where the network link comes on for a few minutes and then goes off and keeps coming on and off.

    Sometimes, the link stays active for a few hours and then it goes off again.

    Any tips on troubleshooting? Could this be a hardware problem?

    I ran the hardware test off the Mac OS X Tiger CD and everything came back fine, but I think that hardware test only tests the main logic board and memory and not the NIC.

    Appreciate any help or suggestions!

  2. superbovine macrumors 68030


    Nov 7, 2003
    check the cable, including sources of interference. (swap the cable with a different one)
    trying changing port on the switch
  3. Fahd thread starter macrumors regular

    Oct 26, 2003
    Its definitely not the port or cable; its definitely something on the macbook. I am guessing hardware problem.

    I haven't tried resetting the SMC yet but I did upgrade the SMC firmware and still no luck!
  4. Paul Wright macrumors regular

    Paul Wright

    Aug 24, 2006
    yeah, check again, i had a cable it worked perfectly wih my PC but i could slide the cable out of my macbook meh and i never realised it until i did it with my hand by accident. Changed the RJ45 connector and w00t it works :p

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