I had the exact same observations as Reinder Sanders. Prior to purchasing a new screen, remove ribbon connector and clean the ribbon contacts lightly with an eraser, reinstall ribbon connector and try it out. Mine worked perfectly after cleaning. I had a problem where steam was leaking from the steam tube swivel connecter O rings. Steam was getting into the electronics section and I assume some light corrosion on the ribbon connector occurred.
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.