Just want to say thanks to all on this thread for giving me a possible fix to my dead E2 and the courage to attempt it. My E2 just failed today, after 2 or 3 years reliable use. I was convinced it was not down to the battery so I used a small jewellers screwdriver to take the torx screws out and a larger one to take the case apart. I disconnected the battery for a few seconds and reconnected & bingo! Instant restart. All I've had to do is reset the date & time.