Troubleshooting Classroom AV Equipment

Purpose: Identify and fix common issues with classroom AV systems when the display, audio, or connections are not working.

Applicable to: Pueblo
Audience: Students, Faculty, Staff, Guests

Prerequisites

Ensure the classroom AV system is powered on via the touch panel.
Make sure your device (laptop, tablet, etc.) is charged and powered on.
Save your presentation or teaching materials to a USB drive, personal laptop, and/or cloud storage (e.g., OneDrive).
Have your CSU credentials (C-number and password) ready to log into the workstation.
- Example C-number: C12345678
Have your cell phone or device ready for Duo two-factor authentication, if prompted.
Bring a laptop charger and any required video adapters (e.g., HDMI, DisplayPort, VGA, USB-C) if connecting an external device.

Important: Classroom cameras only work with the professor workstation computer. They are not compatible with external devices.

Press Ctrl + Alt + Del on your keyboard.
A menu screen will appear with options like Task Manager, Lock, Sign out, and a Power icon in the bottom-right corner.
Click the Power icon using your mouse.
Select Restart from the menu.

If your mouse is not working:

⚠️ Important: Do not select Shutdown — this will not fix the black screen issue.

Additional troubleshooting

If Ctrl + Alt + Del does not bring up the menu, follow these steps to perform a hard restart:

Verify the projector/display power is on using the touch panel.
Ensure the correct input source is selected (Lectern PC, HDMI, etc.).
Reconnect your device’s cable securely.
If the projector is black:
- On the touch panel, toggle Projector Mute on and then off.

Wake the touch panel:
- Tap the screen, as it may have gone to sleep if not powered down correctly.
Check the screen color:
- White welcome screen: Tapping the screen will power the system on.
- Blue input screen:
  - Press the Power Down button.
  - Confirm by selecting Power Down in the pop-up to restart the system.
After restart:
- Once the panel returns to the white welcome screen, tap the screen and select the input you will be using.

Verify your credentials:
- Use your CNumber and password to log in.
Check keyboard input:
- Ensure the keyboard and mouse are properly connected and functioning.
- Make sure Num Lock is on if using the numeric keypad.
- Ensure Caps Lock is not interfering with your password entry.
Be patient on first login:
- The system may take extra time the first time you log in as it needs to create your profile.
Duo Authentication:
- Have your cell phone or device ready to complete Duo two-factor authentication if prompted.
Restart if necessary:
- If the PC is frozen or not responding, press Ctrl + Alt + Delete.
- If that doesn’t work, restart the PC from the Windows menu. Do not hold the power button unless absolutely necessary.
Additional help:
- Visit CSU System Login Support.
- See also Using Professor Workstation Instructions.

Check your device volume:
- Windows: Click the speaker icon in the bottom-right taskbar and adjust the slider.
- Mac: Click the volume icon in the top-right menu bar and adjust the slider.
- Tablet/Phone: Use the physical volume buttons.
Check the content you are playing:
- Ensure whatever you are playing (e.g., YouTube video, presentation, media player) has its volume turned up.
Check touch panel volume:
- Locate the volume slider or buttons on the right side of the panel.
- Increase the volume and ensure Mute is off.
- If sound is not working: Select Mute on the touch panel, then select it again to unmute.
Verify audio output:
- Ensure your device is set to output audio to Extron.
Reconnect the cable if audio still does not play.