Display has vertical/horizontal bands of various cloured dots. Same problem using ext. monitor.
Problem exists on B/W display at boot up as well, although not in colour ( ragged display of words/numbers).
It started after son knocked computer, but not dropped.
LCD display replaced but still the same, but of course ext. monitor check would have proved this anyway if I hadn't jumped to hasty conclusion.
I don't know if comp was on when knocked, but if so could this have corrupted a video chip firmware?
Driving me mad and want to do some photos and artwork.
Thks. for any asst.