Not seeing an image when attempting to camera grade? This help document will address several common causes of this issue and provide solutions.
In some instances, based off of your answers to the questions asked, you will be asked to follow a new link; worry not! All links will open in a new tab or window and will include navigation back to this document.
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Are you using a recommended browser?
If your browser window looks similar to the one above, you are using a browser that is currently not compatible with Lightning Grader. Please select a recommended browser or download the recommended version.
Black or gray screen appearing?
If you are encountering a screen similar to this, please proceed to the next step.
Have you selected a camera to grade with?
If your camera is not automatically displaying in the scanning window, you will need to select Tools > Settings (right below the Lightning Grader window) and choose the corresponding camera from the dropdown menu. Once you have selected the camera, click Save Settings, and return to Scanning.
If you are able to select your camera and you are still not able to see an image, please skip down to the next step.
On occasion, a preferred camera may not appear in the dropdown. There are several reasons why your camera may not be appearing:
- The USB cable is not securely connected to your computer. If you are using a Document Camera, make sure you have the USB cable plugged in and not just the VGA cable.
- Switch USB ports. Be sure to connect to a USB port on the back of a desktop computer, not in the front. If using a laptop, try another port.
- Reboot your computer. Depending on the point in time you plugged in your camera, your computer may not see it.
- Verify your camera works correctly. Try using your camera with another program (i.e. Skype), but make sure you exit this program before trying to use Lightning Grader again. If your camera does not work with another program (i.e. Skype), please contact your District or Tech department for further assistance.
Still not able to see an image? Please proceed to the next step.
Is this camera being used by another program?
If the camera is being used by any other program it will not show up in the scanning window. Similarly, multiple open tabs or browser windows can hide a previously open scanning page. In both instances, exiting all programs is the best way to ensure that the camera is not in use.
Camera still not showing?
Perhaps you are not using a Lightning Grader compatible camera. While Lightning Grader supports hundreds of cameras, there are several that will not work with the program. Please look over our Which Document Cameras Work with Lightning Grader or Which Web Cameras Work with Lightning Grader help docs.