Dell Premier KB900 User Manual page 29

Problems
Zoom touch control icons are
not visible
Backlight does not turn on
Possible solutions
1. Ensure that you have installed Zoom's latest
desktop version (5.9.3 and above) to your device.
2. Swipe the Zoom touch control icons from left
to right or right to left to ensure you have not
accidentally disabled them.
3. Ensure that Dell Peripheral Manager is installed and
running.
1. Ensure the keyboard is turned on.
2. If the ambient brightness detected in your
environment is bright enough, then the backlight
will not turn on to conserve battery life.
Troubleshooting │ 29