Suunto Support response:
Here’s what you can do:
Charge Your Watch - Connect your watch to the charger and let it charge for at least 30–60 minutes without pressing any buttons. Sometimes, a stable power source helps the device recover from service mode.
Hard Reset- While your watch is still connected to the charger, try pressing and holding the main button (or all buttons if there are multiple) for about 20 seconds. This can sometimes force the watch to exit service mode.
Leave It Charging- If a reset doesn’t help, leave the watch charging for a few hours to see if it automatically exits service mode.
Check for Software Update- Once or if the watch restarts, make sure to connect it to the Suunto app or SuuntoLink on your computer and check for any available software updates.
If the watch stays stuck in service mode after all these steps, it likely needs professional attention. Please let me know if the situation changes, or if you’d like, I can guide you through the repair request process for further support.