Hey @gallijg73, this doesn't sound right, can you share a screenshot of the S10? Also, is the phone damaged in any way? Make sure that the brightness is not at the lowest by pulling down the Quick Panel from the Home Screen and adjusting it; it would also help being in a dark room to see if the screen is more visible. Try with a Soft Reset by pressing and holding the Volume Down as well as the Power buttons for 10 seconds. Is the full screen visible now?