The SMART Pen Tray’s lights won’t light up when you pick up a pen or eraser.
If the infrared light sensors in the bottom of your pen tray’s recesses are obstructed, they won’t detect when a pen or eraser is picked up from the tray.
Remove any obstructions from the pen tray’s infrared light sensors. Moisten a cotton swab with a household glass cleaner and carefully wipe the sensors. Also, you can spray compressed air over the sensors to remove debris.
There is a light and sensor under each pen and the eraser. If you lose your pens or erase you can replace them with any other type of marker or even a wooden dowel to cover the sensor.
When the pen is in the tray the light above it (1.) is dark. When removed the light (1.) is lit and the sensor (2.) underneath is uncovered.
If the lights still won’t come on after you’ve cleaned the sensors, try using one of the pens and gently rubbing the sensor until you see it light up.
Last Update: December 6, 2018