One has a damaged Display (it isnt broken), it shows only Stripes from the top to the Roof, and you can´t read any word or sign.
The Other one, does nothing. You can´t switch on or off. we changed allready the battery, no better result. The funktions are dead.
Mayby a damaged Motherboard, don´t now.
Good day! Looks like you have to send it in to the depot. You can contact your local Helpdesk to obtain an RMA.