surface pro not detecting second monitor

Sue Regan 0 Reputation points
2026-03-22T23:45:40.3+00:00

surface pro not detecting second monitor, acer 15" monitor

Surface | Surface Pro | USB-C
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  1. AI answer

    2026-03-22T23:45:51.4533333+00:00

    Use these steps to troubleshoot the Surface Pro not detecting the Acer 15" monitor over USB-C:

    1. Confirm Windows display mode
      • On Surface, press Windows logo key + P.
      • Select Extend or Duplicate (not PC screen only). This ensures Windows is trying to use the external monitor.
    2. Basic hardware checks
      • Disconnect all other accessories (docks, dongles, adapters) from Surface; they can cause conflicts.
      • Make sure the USB-C video cable/adapter is firmly connected at both Surface and monitor.
      • If possible, try a different USB-C video cable/adapter.
      • Test the Acer monitor with another PC to confirm the monitor works.
    3. Check monitor input settings
      • On the Acer monitor, open its on-screen menu and make sure the input matches the connection type (for example, HDMI, DisplayPort, USB-C, DVI, or VGA depending on the adapter in use).
    4. Duplicate/extend from Surface-side tools
      • Again press Windows logo key + P and confirm the correct option (Extend or Duplicate) is selected so the Surface sends video to the external display.
    5. Reset graphics and restart
      • Press Windows logo key + Ctrl + Shift + B to reset the graphics driver.
      • If still not detected, restart: Start > Power > Restart.
    6. If using multiple external monitors
      • If one external monitor works but a second does not, the limitation may be the graphics adapter or connection method. Many devices only support one external monitor per video output, and simple splitters usually only duplicate the signal rather than create a second independent display.
      • For more than one external monitor, use a compatible docking station or a USB-C adapter that provides additional video outputs and is supported for Surface.
    7. Keep Surface and drivers updated
      • Use the Surface app → Help & support to check driver/firmware health and install any available updates via Windows Update.

    If the monitor still is not detected after these steps, follow the full guidance in the Surface external display troubleshooting article and, if needed, contact Surface support.

    References:

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  2. S.Sengupta 32,911 Reputation points MVP Volunteer Moderator
    2026-03-23T01:08:23.8566667+00:00

    Use a high-quality USB-C hub or adapter with video support for your Microsoft Surface Pro.

    Now set it as follows:

    Surface Pro → USB-C hub → HDMI cable →Acer 15-inch monitor

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