The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    Barely visible horizontal flickering lines on secondary monitor

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Meschrenz, Jan 28, 2017.

  1. Meschrenz

    Meschrenz Newbie

    Reputations:
    0
    Messages:
    9
    Likes Received:
    0
    Trophy Points:
    5
    Hello everybody.
    My secondary monitor connected to laptop via VGA has horizontal flickering lines only when laptop is plugged in.
    When not charging it's ok, and I tried different AC adapter and it's good too.
    So, I understand that AC adapter is defective but what relations between laptop charging and secondary monitor?
    Note: Checked also adapters voltage. 19.1 V (which is ok), 18.95 V (which causes flickering lines)
     
    Meschrenz, Jan 28, 2017
    #1
  2. alexhawker

    alexhawker Spent Gladiator

    Reputations:
    500
    Messages:
    2,540
    Likes Received:
    792
    Trophy Points:
    131
    Have you tried using a more modern connection than VGA if the monitor supports it?


    Sent from my iPhone using Tapatalk
     
    alexhawker, Jan 28, 2017
    #2
  3. Meschrenz

    Meschrenz Newbie

    Reputations:
    0
    Messages:
    9
    Likes Received:
    0
    Trophy Points:
    5
    No, monitor supports only VGA and DVI.
    It's not VGA cable issue.
    When I plug in AC adapter it happens.
     
    Meschrenz, Jan 28, 2017
    #3
  4. alexhawker

    alexhawker Spent Gladiator

    Reputations:
    500
    Messages:
    2,540
    Likes Received:
    792
    Trophy Points:
    131
    That's far from the point. VGA is analog - since the AC adapter causes issues, it could be due to digital noise (either a fault of the adapter, or perhaps the A/C in your house isn't "clean" - you could test by seeing if you have the same issue elsewhere, which would suggest the adapter is to blame).

    Since a digital signal is more discrete (high or low only, not continuous like an analog signal), it may not have the same problems as the analog signal over VGA. This suggests any form of DVI other than DVI-A may help.
     
    alexhawker, Jan 28, 2017
    #4