Joy! I took the bezel off and pressed on the cable connector above the keyboard and to my surprise the problem disappeared. Happy that I don't have to replace the screen. :-)
I don't think this is a driver problem purely because of the external monitor results. I do feel however, that in all probability the lcd is on it's way out. Today when I turned it on after many hours of being off the problem is...
Toshiba P100-188
I have a strange problem which has just appeared in the last couple of days.
I am getting some cyan coloured vertical lines which appear in areas that are in a tonal range of mid-grey (so it appears).
Since...