Laptop Does Not Show My Desktop When Connected to the HDMI or VGA Cable in a Classroom


The laptop does not show my desktop on the projector screen when connecting it to the HDMI or VGA cable in a classroom

The projector will only display a blank Windows background

My laptop is stuck in extended mode


  • Classroom
  • Conference room
  • Laptop


The laptop is set to Extended mode


  1. On a Windows PC or laptop
    1. Press the key and P key at the same time
    2. From the menu choose Duplicate
  2. On a Mac laptop
    1. Go to System Preferences
    2. Choose Display
    3. Select the Arrangement tab
    4. Select Mirror Displays


Article ID: 3853
Thu 8/29/19 9:31 AM
Mon 8/31/20 10:54 AM
KCS Article Status
WIP: Only Problem & some Environment captured
Not Validated: Complete & Resolution captured, confidence lacks in structure, content, no feedback
Validated: Complete & reusable, used by licensed KCS user, confidence in resolution & std. compliance