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Dim Screen on a Garmin® Vieo™ Display
If the Vieo™ display is very dim, go to Apps > Tools > Settings > Display > Brightness Level to adjust the brightness.
If the Vieo display is bright when off of the dock but dim when on the dock, remove the display from the dock and navigate to the Brightness Level page. Then place the display on the dock and adjust the brightness from there.
If the display is dim and the brightness cannot be adjusted, clear stagnant warning and error pages on the device, like Trying to connect to Bluetooth and similar pages.
Lastly, hold the power button on the dock until the lights start to blink. Then attach the display and the brightness issue should be resolved.