Ok, sounds bad, it’s most likely the LED or OE is defective. 
We’ll need to exchange it.
Please email bugreport@screeneo.com and tell them you need a replacement unit due to this problem. They’ll send you a form to fill with info like serial number and your backer Id.
But a heads up: the Logistics team is still working out the return procedure for each region, so it’ll be a few days before you’ll receive instructions how to return it to us. The actual exchange should be fast though.