On the 7th of August when I turned on my 24" iMac (bought April 2008) the top half of the screen just went really dark. I brought it to a repair centre which said that the back lighting was dead and the whole monitor needed replacing for £1000. I'm gearing up to take the poor thing back to the Apple Store where I bought it (Regent Street) and say that the quality of the product is not up to expectations. I'd expect a monitor to last longer than 18 months. Hopefully they will repair or replace it for me. Anyone tried the the Sale of Goods Act on Apple?