Windows 10: Can't extend display onto second monitor, black screen

  1.    07 Oct 2016 #1

    Can't extend display onto second monitor, black screen


    I have two BENQ GL2250 monitors connected to my Lenovo H535s via VGA. On bootup the Lenovo logo displays on monitor #2, and not on monitor #1. Then my usual display comes up on monitor #1 and monitor #2 goes to sleep.

    Tried HDMI leads too and a combination of HDMI+VGA, still having the same issue. Drivers are up to date according to AMD software. Any ideas?

    Thanks in advance
      My ComputerSystem Spec

  2.    07 Oct 2016 #2

    Are you in Extend mode? Windows logo key + P select Extend.
      My ComputerSystem Spec

  3.    07 Oct 2016 #3

    alphanumeric said: View Post
    Are you in Extend mode? Windows logo key + P select Extend.
    Yeah tried that still no luck! Thanks anyway
      My ComputerSystem Spec

  4.    07 Oct 2016 #4

    OK, I had to ask the obvious to rule it out. If you go to Settings > System > Display, does it show both monitors? What happens when you click Identify or Detect? Also check Device manager and have a look in "Monitors". See if one has a yellow ! or RED X. The BIOS post showing on the other monitor is normal. I run triple displays and my BIOS Post screen shows on my monitor labeled no 2. The Windows LOG also. Once my desktop loads all 3 screens become active. If I set my display mode to PC only, the boot up shows on monitor no 2, then jumps over to no 1 when my desktop loads. Like yours is doing now. The Video card decides which monitor the BIOS and boot screen shows up on.
      My ComputerSystem Spec

  5.    07 Oct 2016 #5

    Forgot to tell you to make sure that each one is set to the correct resolution.
      My ComputerSystem Spec


 

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