Classroom AV Technology - Troubleshooting Issues
Note: This document is referring to the AV setup present in most classrooms on campus, including classrooms in Forbes Hall, Luter Hall, and McMurran hall (second floor or higher). Classrooms on the first floor of McMurran or the new Science and Engineering Research Center may need to refer to an alternate document here.
The following are common problems that may be experienced when using CNU’s AV systems, alongside some possible solutions.
While these solutions may solve the problem much of the time, it is possible that the issue you are facing will not be resolved after taking them into account. If you try the solutions mentioned here and are still having issues, please reach out to the Helpdesk at (757)594-7079. If you are currently trying to teach, mention that you are in class and a technician will be sent to you immediately.
- 1 Problem: The screen is black, and pressing different items on the touch panel doesn't do anything
- 2 Problem: No Sound is Coming from the Classroom Speakers
- 3 Problem: The monitor is displaying icons/program windows, but the projector is not.
- 4 Problem: The document camera is not displaying or is frozen
- 5 Problem: I need to access something in the cabinet, but it's locked, and I don't have a key
Problem: The screen is black, and pressing different items on the touch panel doesn't do anything
The most common reason you see this behavior is the person who used the AV equipment before you turned on Picture Mute. To turn Picture Mute off, tap the System Tools button.
Then, make sure Picture Mute is OFF for any/all projectors.
Problem: No Sound is Coming from the Classroom Speakers
The first thing you should check is that the system isn't muted at the touch panel (the button will read "Mute" if it is, and "Unmute" if it is).
If that doesn't work, the computer may have selected an incorrect audio output.
Changing Audio Output on Windows
To change the output, click the volume icon in the taskbar.
Then, click the arrow at the top to change outputs.
Choose the one including "Crestron" and the audio should go through the classroom speakers.
Changing Audio Outputs on a Mac
If you are using a Macbook, click the Settings icon at the top right corner of your screen and choose Sound.
In the output list that appears, click the choice with Crestron in it
Problem: The monitor is displaying icons/program windows, but the projector is not.
The lectern display has been switched to "Extend" mode. To switch it back, hold down the Windows Key and P key on your keyboard to automatically pull up a menu with basic display settings.
Change the selection to "Duplicate these displays."
Problem: The document camera is not displaying or is frozen
Double-check that the document camera is on by pressing the power button on the camera. A blue light will be lit if it's on.
Double-check the zoom level of the camera with the zoom wheel.
If the image is frozen, ensure you don't have "Freeze" activated.
Problem: I need to access something in the cabinet, but it's locked, and I don't have a key
The lecterns are supposed to be kept locked at all times. If you've been issued a key for ANY standard lectern, it will work on most lecterns on campus (excluding lecterns in the SERC building and the 1st floor of McMurran Hall). If you have an immediate need to access the tools stored in the lectern cabinet (ex. needing to play a Blu-Ray in class), you can get a key issued by submitting a ticket via help.cnu.edu to request key training. Unlocking lecterns for others or giving your key to others is prohibited.