My Sony Bravia TV (sorry, haven't got the model in front of me), which is just over two years old, has started to show horizontal lines on the screen.  I think it's a fault in the display itself as I can see them on all channels and all inputs (i.e. TV, Freeview set-top-box connected via HDMI, Wii connected via composite cables).

The lines run horizontally across the entire width of the display and are about three fifths of the way down the screen.  They show up most when displaying solid colours in that area of the display.

I've tried to take some photos of them with the lines marked with red rectangles to show you where to look:





Does anyone know if this is a common fault with LCD TV's?  I think the TV only came with a 1 year warranty, what are my chances of getting it replaced under the Consumer Guarantees Act?

I bought it from Dick Smith.