I am connecting my Macbook Pro 13 june 2012 model to a Sony Bravia LP 32 inch tv. The picture has a heavy purple colour cast, anyone know what the problem may be? Display settings is on the pixel dimensions 1360 x 768 when this happens. However when I switch the setting to 720p the colours are ok. The thing is that the text is more clear to read on 1360px x 768px so I would like to use that setting.