Thecla

Hi all, Not sure if this is the right place to ask, but ad of yesterday evening my tv screen turns translucent black after connecting either my smartphone of my laptop with screen share. My tv is in the same wifi network as the laptop, the smartphone and my Ziggo media box. Last weekend my Tv got updated. If I am streaming my smartphone via the mediabox the tv screen gives normal views. Anyona an idea? Thanks from the Netherlands Thecla