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lock screen flashing after wake from sleep.

Discussion in 'Windows 10 Help' started by cyberwasp, Mar 13, 2019.

  1. cyberwasp

    cyberwasp Established Techie7 Member

    After KB4481031 I've been experiencing a strange occurrence. Whenever I go out I usually lock my PC, "I know, kind of useless," but have been doing it for years.

    Anyway for the past month or so when I wake up the screen to put in my pin, the screen flashes off and on at about once every second. At first I thought it was a video driver so updated to the latest one and it stopped for a bit. Than it returned so I checked and got a newer update. Again it worked for a bit and than started again. swapped out monitors and still does it. If I do get into windows it performs normally and never flickers.

    Has anyone had any issues like this since KB4481031 update. I doubt the update is the cause but who knows? ?

  2. Digerati

    Digerati Super Moderator Techie7 Moderator

    Not heard of those problems after that update. But I have seen that problem several times before. It typically indicates a failing monitor (you eliminated that by swapping monitors), a failing card, or a failing PSU.
  3. cyberwasp

    cyberwasp Established Techie7 Member

    Just an update. After getting a new monitor I took apart the old ones power supply and fixed it!
  4. Digerati

    Digerati Super Moderator Techie7 Moderator

    That really does not make sense because you said in your opening post that you swapped out monitors.