Monitors Randomly go Black

Discussion in 'Mac Pro' started by tobiasenstrom, May 2, 2019.

  1. tobiasenstrom macrumors newbie

    Joined:
    Mar 30, 2018
    #1
    I've been using 3 screens without any issues but when I add a 4th it goes a bit wonky.

    All 4 screens randomly go black and then come back. They all do it at the same time.

    Details are:
    • The graphics card has 5 outs. 2 HDMI, 2 Displayports and 1 DVI.
    • I've been using 2 Displayports and 1 HDMI
    • When I add the 4th I'm using the 2nd HDMI.
    • They are all going to VGA inputs on the monitors
    I have switched the 2 HDMI monitors to see if it's the output of the card. It's all ok with 3 but when I add the 4th the same problem occurs

    Graphics copy.jpg system copy.jpg
     
  2. crjackson2134 macrumors 601

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
  3. tobiasenstrom thread starter macrumors newbie

    Joined:
    Mar 30, 2018
  4. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    Any spare hard drive to try High Sierra / Mojave? The RX570 has more mature driver support in later OS.
     
  5. tobiasenstrom thread starter macrumors newbie

    Joined:
    Mar 30, 2018
    #6
    I down graded from High Sierra to Sierra so I could still run Logic Pro 9 as a 'just in case'.

    I don't need all 4 monitors on at once. As long as there are no more than 3 monitors on at a time, it all works fine. Just would have been nice though.

    Thanks
     

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5 May 2, 2019