Common Causes
- Laptop video settings (Duplicate/Extend or display detection) are misconfigured.
- Incorrect input selected on the touch panel hamburger menu (Auto, USB-C, or HDMI).
- Laptop not outputting video or attempting to share to a display that is powered off.
- Loose connections or faulty cables/adapters in the Teaching Station cubby.
- Issues with adapters, docks, or secondary devices that may interfere with video detection.
Troubleshooting Steps
Step 1: Confirm connection via the cable cubby
- Ensure your laptop is securely connected using USB-C (preferred) or HDMI.
- If using an adapter (e.g., USB-C to HDMI), ensure it is firmly connected and supports video passthrough.
- Try reseating the cable by unplugging and reconnecting at both the laptop and cubby.
Step 2: Select the correct input on the touch panel
- Check the touch panel. The main page should display input status as Laptop.
- If the room projector displays “Source Not Detected,” tap the hamburger menu on the touch panel and manually select the appropriate input:
- Auto (recommended, default setting)
- USB-C
- HDMI
Step 3: Adjust your laptop’s display settings
-
Windows:
- Press Windows+P and select Duplicate (recommended) or Extend.
- Open Settings > System > Display, click Detect Displays, and confirm the resolution is set correctly.
-
Mac:
- Go to System Settings > Displays and choose Mirror (recommended) or Extend Desktop.
- Click Detect Displays manually; hold Option for advanced settings if necessary.
Step 4: Restart your laptop and reconnect
- Fully restart your laptop and reconnect the cable after it powers back on.
- Ensure USB-C or HDMI is securely connected, then reselect Auto on the touch panel to force recognition.
Step 5: Test a different cable type
- If your laptop supports both USB-C and HDMI:
- Switch from USB-C to HDMI (or vice versa) in case the cable or port is faulty.
- Reseat the new cable firmly at both ends and manually confirm the input selection on the touch panel.
Step 6: Restart your playback app or platform
- Close and reopen the app that is sharing your content (Zoom, PowerPoint, browser tabs for YouTube).
- Restarting playback can sometimes force resync between your laptop and the AV system.
Step 7: Inspect projector status
- If the projector shows the “Source Not Detected” splash:
- Verify that your laptop is powered on and firmly connected to the cubby cable.
- If the projector shuts down after 5 minutes due to inactivity, restart the touch panel system and reconnect your device.
Quick Fixes
- Disconnect cables and reconnect them securely to your laptop and the cubby.
- Tap the hamburger menu on the touch panel and select Auto for input detection.
- Switch cable type from USB-C to HDMI or vice versa, reseating both connections.
- Restart your laptop and reselect input on the touch panel after reconnecting.
- If using an adapter, test with a direct connection or another adapter to rule out passthrough problems.
What To Do if the Problem Persists
If you still cannot get an image to display, contact the AV Helpdesk immediately.
Fastest Option: Submit a request online via the QR code on the projector splash screen or at av.as.cornell.edu.
Phone: Call (607) 882-1646 for assistance.
Email: Send a message to as-avhelp@cornell.edu.
Support Hours: Weekdays, 8:00 a.m. – 4:30 p.m.
Technicians can often begin remote troubleshooting right away and dispatch a tech to your classroom within approximately 10 minutes.