Garmin makes excellent smartwatches and fitness trackers, and the Forerunner 255 is now a multisport triathlon watch. Sure, it’s a running watch, but you can use it while swimming or biking featuring Garmin’s high-end multi-band/dual-frequency GPS chipset. But some of the Garmin Forerunner 255 users reported that they are experiencing issues with the watch not turning on or taking too much time to turn on. Today’s blog has several troubleshooting solutions to fix Garmin Forerunner 255 doesn’t turn on issue.
Solutions to fix Garmin Forerunner 255 Won’t Turn On

1. Check the charging ports
The Garmin Forerunner 255 is powered by a built-in rechargeable lithium-ion battery. But before you replace a faulty battery, try cleaning the charging points first. If the charging ports are clogged or dirty, it is likely the cause why the Garmin forerunner 255 won’t turn on.
Clean charging points by rubbing alcohol using a fabric or cotton swab. For hard-to-remove dirt, use a small brush to clean the dirt.
After cleaning, check for battery issues by plugging Garmin into a power source and charging it for an hour. If the watch still won’t turn on, there may be issues with the battery. And you may need to replace the battery using the Garmin RMA method.