Ethernet light keeps flashing when the machine is powered down

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  1. Posts : 119
    Windows 10 Pro 22H2

    Ethernet light keeps flashing when the machine is powered down


    I'm not sure if this is the forum to ask, but as the title says, the ethernet light keeps flashing when the machine is turned off. I remember this happening about 10 years ago and for the life of me I can't remember what setting to change. I believe it's either in the network adapter settings or through device manager. Does anybody know what changes I can make?


    I'm on Windows 10 Pro 22H2
      My Computer

  2. Posts : 42,481
    Win 10 Pro (22H2) (2nd PC is 22H2)

    Probably your equivalent of this?
    Ethernet light keeps flashing when the machine is powered down-1.jpg
      My Computers

  3. Posts : 188
    Win10 Pro X64 22H2 build 19045.3803

    You might also check to see if "Wake on Lan" is enabled in the BIOS and disable it.

    Many computers have a feature called "Wake on Lan" which can be enabled and disabled in the BIOS. I suspect this is what's causing your ethernet interface to blink while your computer is supposed to be off. When this feature is enabled, an appropriate packet received over the network will cause the computer to turn on and boot. For this feature to work, the computer's network interface must powered on all the time, even when the computer is nominally powered off. It's often used in corporate environments so software can be updated during off-hours, when the computer normally would be powered off to save energy.
      My Computer

  4. Posts : 9,746
    Mac OS Catalina

    Modern standby means that devices are never fully powered down unless you have physically removed the power source. The Ethernet eill continue to show ping activity from the router while there is power on that device.
      My Computer

  5. Posts : 2,281
    Windows 10 Pro/Windows 7 Ultimate

    Yeah, it's a power setting.... or the NSA...

    =Off Topic =

    Movie was a blast back then. I saw it in the movie theater opening day, too I believe. The movie to me reminds me of Gene Hackman's performance in the movie The Conversation. Totality different plots of course, but the theme is there in a way...

    Did pretty good in the box office! The Conversation - Wikipedia

    Wikipedia said:
    Surveillance expert Harry Caul, who runs his own company in San Francisco, is obsessed with his own privacy. His apartment is almost bare behind its triple-locked door and burglar alarm, he uses pay phones to make calls and claims to have no home telephone, and his office is enclosed in a chain-link cage in a corner of a much larger warehouse. He has no friends, his girlfriend Amy knows little about him, and his sole hobby is playing along to jazz records on a tenor saxophone alone in his apartment.
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  6. Posts : 119
    Windows 10 Pro 22H2
    Thread Starter

    It's a new Lenovo and this is the only pc I have that does this, so it's a setting somewhere.

    @dalchina, @selden, it could very well be that. When I get a chance, I will look at those settings. Thanks
      My Computer

  7. Posts : 9,746
    Mac OS Catalina

    There is no setting that can be changed. Machines have been this way for over ten years.
      My Computer

  8. Posts : 1,204
    11 Home

    It's how this particular network IC has been designed by Intel. Even after you pull the ethernet cable out of the computer to allow the IC to enter Ultra Low Power (ULP) mode with the computer shut down (Shut Down = neither Legacy Standby nor Modern Standby..), the LEDs on it will still be in Tri-state mode.. just look at the bottom of page 43 in the official datasheet:
      My Computers

  9. Posts : 42,481
    Win 10 Pro (22H2) (2nd PC is 22H2)

    ..although the first post makes it sound as if this wasn't happening, but now is... @cheaterslick - please confirm.
      My Computers

  10. Posts : 119
    Windows 10 Pro 22H2
    Thread Starter

    I have two new machines that I'm helping someone configure. A 14" Lenovo ThinkPad and an ASUS ExpertBook 14" laptop. The Lenovo ethernet flashes while the ASUS one doesn't. Both happen to be Windows 11 but that shouldn't make any difference here. It's not about "paranoia", it's about making it so the light won't flash at night in their bedroom, keeping people awake.

    So I'm convinced it's a setting. I'm not at home right now so I can't do anything at the moment, but I do remember there was a way to turn it off from back in Windows 7 days.
    Last edited by cheaterslick; 04 Mar 2023 at 20:40.
      My Computer


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