I'm having this same exact issue. My watch started having issues with the battery (charging and holding a charge) which I first assumed was maybe the charger so I bought a new OEM charger. The problems still persisted. Next I bought a new battery and still had no change in my watch's issues. To date, I cannot turn my watch on at all. The only time anything displays on the screen is when it is on the charger and it shows the charging battery percentage. When I hold the power button (for any length of time) it still will not turn on. Same thing when I hold both buttons. Additionally it will not turn on while off the charger as many people have stated in this forum. This seems to be an issue that is starting to plague S3 owners as their devices start to age. Considering the watch isn't exactly ancient technology, and Samsung markets themselves as a "premium" electronics company, this is really disappointing. Hoping to hear a fix for this issue sooner rather than later since there's no fun in having a $300 paperweight.
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