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Power Up Issue: LAN Cable Disables Power Switch?

Discussion in 'Hardware' started by lightnb, May 17, 2007.

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  1. lightnb

    lightnb Thread Starter

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    Jun 16, 2002
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    I've got a computer that's turned off. I press the power switch, and nothing happens. Now, I unplug the network cable and the computer turns on.

    Why does having a network cable connected prevent the computer's power switch from functioning? And why does unplugging the network cable cause it to power up?

    The computer has worked fine for a year, but was recently moved to the other side of the room, and a new switch replaced the old network hub at the same time.
     
  2. lightnb

    lightnb Thread Starter

    Joined:
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    I swapped network cables and the problem still persists.

    Any ideas?
     
  3. lightnb

    lightnb Thread Starter

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    Ok, here's an interesting discovery: It works fine when it's plugged directly into the 10/100 router, but misbehaves when it's connected to the 10/100/1000 switch. The computer has a gigabit NIC.

    Do know if that helps, but maybe it narrows it down a bit?
     
  4. JohnWill

    JohnWill Retired Moderator

    Joined:
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    Sounds like you have some sort of power or grounding issue with one of the components.
     
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