Just this morning this has happened. The screen will sometimes go off for a period of time before coming back on again. Other times the colours will be negative - namely I have a black theme and it goes white, blue becomes yellow, yellow blue etc. etc.
Also some of the buttons on the top panel are intermittently either sluggish to respond or possibly not working at all. Although it might be that when I press them it's generally causing the screen to go off for a few seconds then come back on again.
Anyone know what the problem might be?