Well, it’s kind-of broke, although it’s not really broke at all, just developed an annoying fault. It looks like an image has burnt into it, although it is very faint and, and looks like the top part of Firefox.
The thing is though, I haven’t a clue how this has happened.
I always thought that for an image to burn in it had to be left on the screen for hours, although my monitor’s are set to switch off after 5 minutes.
So it doesn’t seem to make any sense to me at all, and it is one of those things that I wish I had never noticed, as my eyes keep getting drawn to the spot where it is.
But, what top’s it off is that I have 2 monitor’s, both identical, and the one that should go wrong would have to be the older one outside just of it’s warranty period. Although maybe Acer wouldn’t notice if I said it was the newer one. Hmm, Maybe that’s worth a try 
(I never said that though!)
Thanks for that tip, I’ll give it a try, I’ve been running this
http://www.jscreenfix.com/ on it aswell for a while now, but to no avail.
What might work is letting it ‘rest’ for a while.
I busted my (CRT) TV a while ago by putting a magnet on the front of it, and it ‘healed’ itself over time.