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Solved Monitors going into power saving mode

Discussion in 'Windows 10' started by oitconz, Feb 21, 2018.

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  1. oitconz

    oitconz Thread Starter

    Feb 21, 2018
    I've just installed Windows 10 on two Dell PCs. The Dell PCs are identical model and purchased at the same time - client wanted them upgraded from windows 7 to 10.

    One of the PCs is having monitor trouble. Two monitors on an ATI HD 5400 graphics card. One connected via VGA D-Sub and the other via the DVI port (using a convertor to change from DVI to a VGA cable).

    The monitors go into power saving mode showing a message that they are about to go to sleep - it is the same message as when you turn off the pc or pull out the video cable.

    The screens blank, then the display shows on the other monitor. After a few seconds the screens blank again and the Pc returns to using both monitors.

    so far I have:
    • Changed both cables
    • Changed both monitors
    • Checked physical connections are screwed in
    • Turned screen save to be 20 minutes plus
    • Set power saving to not turn off the screens
    • Set PC to maximum power
    • Done a windows update on the screen drivers
    • Downloaded the latest drivers from ATI and installed them
    • Checked resolution
    • Deleted and reinstalled the display driver
    • Logged in as multiple users
    I've had the issue disappear for as long as 20 minutes and as short as every two minutes.

    The PC was working perfectly under Windows XP ( yes they are licensed for windows 7 but software needed to be held at XP as there was no upgrade path for specialist software)

    Display settings have been set at single colour background, no transparency, no power saving settings, no screen saver

    Differnet applications have been running while it faults
    • Outlook 2016 - latest version
    • Firefox - latest version
    • MS Defender antivirus then replaced with nod32 antivirus - latest versions
    • No updates left to download and do
    • Nothing seems to show in task manager
    Any thoughts appreciated.
  2. Santosh100


    Sep 13, 2008
    Look at any events?
  3. Lanctus


    Jul 20, 2017
    Sounding like you have a multi-screen display, one of them will be the "controller" monitor that wakes up the other(s). I've had experience in the past that the controller monitor, for one reason or another (old and going bad or compatibility issues, time for an upgrade, etc) would work part of the time, and failed others. If the controller has issues, the others depending on it to "wake up" can have issues too.

    Have you just tried replacing the two monitors you are using with two (newer) monitors? Do your new PCs have any DP slots? With older machines (or ones just not acting right when using the network card), I've removed the network card and bypassed it with two DP slots (ie: Dell 7040 and 7050 PCs). That has fixed certain display issues too. Without seeing the PCs in question, it is difficult to get an accurate assessment for the problem, but monitors are fairly easy to safely experiment with.
  4. plankton23


    Feb 7, 2018
    With windows 10, it's a bit finicky when it comes to those cumulative updates and the OS upgrades....ie Anniversary update and Fall Creators Update. These will generally reset PC to default settings. So you'll need to go back and check the power saving mode for monitors. I have mine set to turn off after 10 minutes of idle time.

  5. oitconz

    oitconz Thread Starter

    Feb 21, 2018
    Nothing there
  6. oitconz

    oitconz Thread Starter

    Feb 21, 2018
    The HD5400 has a VGA and an DVI connection. The DVI connection had a convertor ( DVI to VGA in it). While this worked perfectly with previous operating systems it seems it caused havoc with Win10. Removing te DVI to VGA connector and replacing it with a DVI cable worked.

    I suspect the DVI to VGA doesn't allow the power signal pin to send signals between PC and monitor correctly and for some reason this causes either the monitor to go into power save mode or the Win10 to do the same. However the issue showed up at random times e.g. 20 minutes okay before crashing, through to crashing every 1 -2 minutes.
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