

Hi. I don’t know if you fixed the issue. But I had the same problem and based on my research I soaked the watch in warm water and reset it and it work. Apparently this is a common issue when a button gets stuck. I didn’t have an issue with any buttons prior to this. But I noticed when I was trying to fix it that the down button wasn’t beeping when pressed but the others were and soaking it must of loosened the problem. I hope that helps.
Put into lukewarm water for about 30 minutes. Adding some mild detergent (regular soap should do) might help as well. During the bath, shake it vigorously several times while keeping it submerged. Remember not to press any buttons when the watch is under water.
Your fix of running the watch under warm water worked like a dream. The stuck button became unstuck and a reset then brought the watch to normal mode from Test mode. Thanks!