Had the Nexus 7 for a few months now. Currently travelling around SE Asia. Been working great until this morning. Suddenly when ever I try and view something in landscape it goes dark! Auto-rotate is selected in Setting/Accessibility and I have rebooted the machine with no result. The moment you start to rotate from portrait to landscape it starts to dim and by tge time you reach landscape it is virtually dark. Any help would be much appreciated as this is driving me mad!