They usually can be resurrected. Either a new battery or sent to Garmin.
Yes, I know - maybe to have a backup watch. I´m quite pleased with the new one so far.
PS. It´s not totally dead but lasts only 20 minutes on the battery.
Ok, thanks - I´ve already been looking at a few other instructions on the Internet. Doesn´t look too hard once you´ve got all the things needed to go ahead. I´m in no hurry now that I have a new watch but one of these days it could happen...