I have already posted my solution to the blank screen and buttons not working, I removed my A6 from the ,magnetic case and it immediately work as it should, as an experiment I put it back in the case and everything went black, removed it from the case and it worked OK again, I had originally tried to reboot it which did work but only to restart it, touch screen did not work along with home button etc. Why it should act up now after having been in the case for a long time s a mystery