Still getting the same effect on my displays = first line, all pixels on; second line, all off - like picture in attachment in post #1.

I'll order a new display and try again. Hope to give you more info shortly.

Thank you for all your suggestions.

Blainecf, I always put some nail varnish as a mark on the upper side of my PICs ...because what happened to you, happened to me too sometimes ago :-)