Garmin Fenix 8 - 47mm, AMOLED: spontaneous shutdown

Good afternoon,

Approximately two weeks ago, my watch started turning off spontaneously, without any action on my part. I haven't identified any specific pattern – this occurs during training, while sleeping, and during regular wear, happening between one and several times per day.

I've already tried the following troubleshooting steps:

  • Cleaned the charging contacts

  • Performed a factory reset

  • Performed a factory reset with full data wipe

  • Enabled button lock (suspected power button might be sticking)

  • Re-flashed the firmware

  • Joined the beta testing program to try different software versions

None of these actions resolved the issue.

I would appreciate your assistance in resolving this problem. I'm ready to provide any necessary diagnostic data – logs, dumps, etc. – to help identify the cause.

Thank you for your support.