When pairing, make sure you have Bluetooth turned ON, and that you are on a 2.4gHZ Wi-Fi network.
Unplug your EXPO Display Case, and then plug it back in to power it back on. Wait at least 30 seconds to ensure it boots up properly before you attempt the pairing process again.
If the power button on the display is not illuminated, perform a soft reset by simultaneously holding the power button and the “–” button for 15 seconds and then wait for 30s for the power button to light up.
Once the power button is lit up, you can initiate the pairing process in the Nanoleaf mobile app again.