File:Wsod.jpg

This is White Screen Of Death, originated in United Kingdom. It was used in VHS ending, especially in USA, long after the credits roll. But it's no suprise it was also used briefly as a XNT 1 testcard from late 1981 to 1984. During startup, it was followed by either color bars or PM5544 testcard, used also in XNT 1. It was later replaced by a variant with red bars in 1984.