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Classroom Tech March 23, 2026

Projector or SmartBoard Not Displaying

Steps to take when your projector, SmartBoard, or classroom display is not showing your screen or showing a blank/distorted image.

Projector or SmartBoard Not Displaying

When your projector or SmartBoard is not showing your screen, the problem is usually a connection or input source issue — not a broken projector. Try these steps before submitting a ticket.

Step 1 — Check the Cable Connection

  • Firmly unplug and re-plug the HDMI or VGA cable at both ends — the computer end and the projector/display end.
  • If using a dongle or adapter, try removing it and plugging the cable directly.
  • If you have a spare cable available, swap it to rule out a bad cable.

Step 2 — Select the Correct Input Source

The projector must be set to the same input your computer is connected to.

  1. Press the Source or Input button on the projector or its remote.
  2. Cycle through the options (HDMI 1, HDMI 2, VGA, etc.) until you see your desktop.

Step 3 — Extend or Duplicate Your Display (Windows)

  1. Press Windows key + P on your keyboard.
  2. A panel will appear on the right. Choose:
    • Duplicate — shows the same image on both your laptop and the projector (most common for teaching)
    • Extend — treats the projector as a second monitor
    • Second screen only — only shows on the projector

Step 4 — Restart the Projector

  1. Press the power button on the projector or remote to turn it off.
  2. Wait 30 seconds for the lamp to cool.
  3. Power it back on.
  4. Wait for the startup sequence to complete before checking the display.

SmartBoard-Specific Issues

Touch is not working: Open the SMART Board software (look for the SMART icon in the taskbar) and run the orientation/calibration tool.

Board shows image but pen does not work: Make sure the SMART Board USB cable is connected to your computer in addition to the HDMI/VGA cable. The USB cable is what sends touch data.

SMART Notebook files opening in Chrome: Right-click the file → Open with → SMART Notebook. If Notebook is not listed, it may need to be reinstalled — submit a workorder.

Submit a Workorder

If none of the above steps work, submit a ticket at support.nobleps.com, select SmartBoard or Projector, and describe exactly what you see on screen (black screen, "No Signal," distorted image, etc.) and what you have already tried.