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  • Could be a problem with the gmaptz.img file, i.e. the time map.
    First try using the webupdater to see if it offers you a time zone map update if it does then take it.
    If it does not then mount the Edge to the computer and delete the following file
    Garmin\gmaptz.img (This is the time zone map)
    Run the Webupdater after deleting the file and it will reinstall the map for you.

  • I gave that a go, but todays ride is dated 2019 and using the fit tool online has not managed to fix the corrupted time data.

    What now?

    Can I save my profiles and then do a hard reset? Any guidance on how to do this would be hugely appreciated.

  • I've been getting this a few times recently. I did a hard reset and I still had it a few times.

    I emailed Garmin and told them their useless, not just for this reason but others. They're going do make me pay £70 for a new replacement one.

    You can do a hard reset via the system menu. I tried to save my activity profiles but it didn't seem to work. I just had to remake them.

    You might find that you ride file is on the Garmin also. For me it would just make a weird file incorrectly dated. If I looked on the activities I had the correct file too.

  • You can but it does not always work as advertised, essentially you need to copy a few files off the garmin and then put them back after a reset and replace the newly created files.
    https://support.garmin.com/faqSearch/en-US/faq/content/eWswdSH4aC3xrXxmQj7U9A

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