Garmin Forerunner® 235 Sports Equipment Smart Watches download pdf instruction manual and user guide My Garmin 405 Forerunner never synced properly with the ANT agent and I have downloaded it properly. And on race day, even fully charged, Garmin Forerunner died on me! Useless. I got so fed up with the lack of responses before I wrote on this site and Garmin Support emailed me b/c their support site is ridiculous. Maintaining updated Garmin Forerunner 405 software prevents crashes and maximizes hardware and system performance. Using outdated or corrupt Garmin Forerunner 405 drivers can cause system errors, crashes, and cause your computer or hardware to fail. Furthermore, installing the wrong Garmin drivers can make these problems even worse. Find great deals on eBay for garmin forerunner 405. Shop with confidence. Skip to main content. garmin forerunner 410 garmin forerunner 405 band garmin forerunner 305 garmin forerunner 405 charger garmin forerunner 610 garmin forerunner 405 battery garmin forerunner 405cx garmin forerunner Without specific details it is difficult to know where to begin the troubleshooting process. To start from scratch or ensure that all settings are correct, access the 405 Owner's Page. This takes the user step by step through the process of setting up a 405 properly and pairing it with Garmin Connect (web-based) and/or Training Center (PC based). Get the App. On your smartphone, download and install the latest version of the Garmin Connect Mobile TM app. Sign in to your existing account or create a new account, then follow the instructions in the Garmin Connect Mobile app to add your Forerunner® Sport watch and personal trainer, Forerunner 405 gives you the best of both worlds in a sleek, stylish package. This high performance watch is easy to use and comfortable to wear when not training. Simply tap the touch bezel to change screens without fumbling for a button. Forerunner 405 comes in 2 colors — black or green — to fit your st